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- เผยแพร่เมื่อ 26 ก.ค. 2024
- This video details the common issues you may run in to with an LB7 Duramax. The LB7 Duramax was the first generation Duramax that spans from 2001 to early 2004. Later in 2004 the moved over to the LLY.
HERE ARE THE TOP 3 ISSUES:
Water Pump Failure
Blown Head Gaskets
Bad Injectors & Injector Location (Under Heads)
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lb7 Is the best imo everyone says injectors were a problem but when properly maintained and not thrashed on they hold up I got one with almost 500k miles with no problems except it just needs injectors its only had one set of injectors and a waterpump, they are great trucks!
i have an 03 have had the injectors done had water pump replaced .It is a solid truck still like new. love my truck
My LB7 is poorly maintained and isn’t stock, pushing a lot of power and is beaten daily. Temperatures are way higher than intended without it being studded. And it still runs great. 🤷🏼♀️ can’t kill it
Step dad has one bought it with 26k miles it now has 280k and it has been a work truck the whole time. Hes handicap so I've drove most the miles. Never been too tough on it unless I had to be. We're in the scrapping business and pull heavy loads regularly or hauling equipment. Bout 160k of those miles were pulling a trailer would be a good estimate. It's been very reliable and can pull just about anything you can fit on a 25ft flatdeck trailer or dump trailer with relative ease. I wont disclose the heaviest load we've pulled with it because of legality issues but it was impressive to say the least. Lol. The truck has paid for itself many times.
I'm the second owner of my 04 did the water pump and fuel injectors runs strong. I got the truck at just under 24k miles and I'm just now getting to 170k and love it.
if you have the stock injectors and your truck starts smoking you probably need to replace the injectors cuz they will be leaking fuel into the oil and that will ruin the oil pressure sensor. i took my truck to the dealer since we just moved to nevada and they told me the engine was shot and i needed a new one for 23,000 bucks i told them that would be a new truck and i drove away and found a diesel shop and it only cost me 11,000 for the injectors 3,006 and the injector lines all had to be replaced the braking system was leaking and the power steering was leaking. after 3 oil changes in 3 weeks i now have a strong running truck. go with the bosch injectors they do not have the problems of the stock ones i am just short of 200,000 miles keep an eye on your oil and black exhaust smoke. good luck
@@17buckrogers a year later but u got ripped its a 3-5k job max lol not 11k
Excellent LB7 content, thanks! After the typical 20 year old chevy truck maintenance is done, these trucks are freakin AWESOME! Slap a tune, and exhaust on them and it'll blow the tires off newer vehciles :D
i did a lot of research in the sound department and the lb7 sounds way better than any other duramax
Fixed vane vs VGT
Lbz with a turbo back sounds amazing
I just got one cause it sounded the most reliable out of the other motors. Lmm, lly ect
I, and others, have problems with fuel filter orings leaking air into fuel line. Some have BYPASSED the filter, which I'm hesitant to do, but I'm trying to replace the fuel filter head. Good video!
Good luck. Try using some clear tubing to make sure no bubbles are leaving fuel filter. Helped me but still have hard starting problems 😢
Had my lb7 for 6 years. At 190k now. Got Bosch remans at 115k and water pump done around then too. Other than drivetrain stuff, thermostats and rotting coolant o rings and lines. Trucks never left me hanging, except the time my idler pully went and belt wiped fan blade out. Stuck a fass on it and run fuel additive every tank. Eclb on 33s getting 23mpgs with crazy low egts compared to other dmaxs. At 22pds boost up a 7 mile 9% grade egt runs steady 1250 with 8k trailer behind it. 15mpgs with that enclosed car hauler on flat ground. Been running syn motor oil in transfer case since I got it. Has all bolt ons and efi live. Stock trans I just take it easy in o/d. More than enough power for me. I can’t see myself ever selling it. It’s been that good of truck. I’ve had that truck many states away from home on vacation with trailer many times. 6 speed would be nice, but only time I ever felt the need for it was in mountains with a trailer at 60mph. I usually just speed up some to keep egts at bay. First mod for lb7s should be lift pump. Entire fuel system, cp3, injectors will all benefit from it in long run. Turbo horn definitely helped light the turbo faster from stop. Recommend that too. Lb7s very reliable after the quirks get addressed. But any duramax has its quirks.
I have a 2004 with 410000 miles on, the injectors have been replaced twice, once at 205000 and I just put a new set of Bosh injectors in it, doing a little front end work now. Still love the truck
Got a 02 LB7 just put a Airdog 150 so far I love it. Before empty I would get 19 to 20.5 mpg. Loaded trailer get about 13.5 Waiting to see how loaded with airdog will do.
also brake system (booster) and power steering leaks
LB7’s also had an issue with the filter heads taking on air from the bleeder and various other seals and o-rings as well. Other then that one of the best duramaxs
Question , I just bought a 2001 Duramax, 211,000 miles , noticed the turbo doesn't whistle instead I'm hearing a whine , but also it goes into limp mode after it hits 3000 rpms, any suggestions , the guy I bought from said replace fuel filter
Thanks for the vid. I couldn’t find one bit of info online anywhere about lb7 duramax engine. Must be super rare. Good that this info is out there...never heard any of this stuff.
You must not be looking hard. The WORST thing I ever did was trade a 1999 Powerstroke 7.3 in on a 2003 Duramax LB7!!!
the LB7 is the first generation duramax
MrBNARick you must’ve bought a lb7 that wasn’t well maintained then because it’s a reliable truck
Head gaskets are not that common on the lb7 it's mostly injectors
Right that what I’m thinking head beakers were a common problem on the LLY not the LB7
LB7s use the same gaskets as LLYs. The LLY is more likely to blow them but it’s still an issue on LB7s
Tyrel Granger I’ve heard about there water pumps
i know its gonna sound dumb but if the truck takes a long time to crank on does that mean my injectors are done?
@@texasnhis49bitches49 yeah its a cause dealing with it right now on my 03 starts fine cold but when hot take a lot of turns to fire
LB7! My favorite. I know! It has it's problems. Good truck.
Mine is 2003 Duramax. It's mileage is 140,000. I replaced all the fuel injectors. There is no other issue with this truck other than driving uphill with a camper on its bed and a jeep pulled behind. Any recommendations to consider?
Is there preventative maintenance to keep them injectors working good?
I’m looking at a used 2003 GMC Duramax 2500. It’s got only 105,000 miles on it. I’m guessing it’s got the LB7. It’s in pretty much mint condition and when you look at the price of newer trucks, I figure it’s a great deal. Priced at $18,000.
Did you get it? I bought mine for 13,500 with 103000 during the pandemic. Guy didn’t post it online and kept lowing the price because no one ever stopped or called
So $13,000 is to much for lb7 with 285,000?
@@khadimrasul3321 I think so
I just bought a 2001 2500HD Duramax 91,800 miles for $14,000. Very clean truck older couple(70’s) own it one owner.
i bought a 2004 chevy duramax $18,500 with 181k miles. you got a deal!
Don’t forget about the passenger charge pipe getting hole worn through by the power steering lines and the transfer case pump rubbing through the case.
Isn't the transfer case pump any early 2000s chevy
Dont you mean driver side pipe?
That lb7 Hitter Ol Son‼️
What is y’all’s opinion on installing a air dog 150 fuel pump on a LB7
Couldn't some type of thermal-wrap be applied to that section of the exhaust pipe to keep that head cooler??
You can but it’s really not an issue. I don’t know anyone that’s ever had an issue from a hot down pipe
Isaac record you sound like you really know your diesels. I am looking at an 03 duramax 230k mile for about 5k think I should get it? Looks decent inside and out. I am no diesel mechanic though.
Anthony M Sounds like a good deal if it’s clean and doesn’t need major mechanical work. Ask if it’s ever had injectors done and if they have proof. Check oil for fuel and exhaust for excessive hazing and then basic stuff like leaks and blow by
That isn't going to cause any issues. The most retarded uneducated thing ive ever heard someone say. And he is completely wrong about injectors, you do not put vco style injectors back into this truck you always put sac style. The water pump takes like 1hr at most to replace. Injectors for somebody doing it their first time take like 5-12hrs
Isaac record i would rather be safer then sorry
A question
When I drive LB7 on the road, temperature of engine is fine with a truck camper on its bed and a jeep pulled behind. But I drive the truck with the same setup on uphill, the engine Temperature goes high. Sometimes, I have to stop to cool the engine off. I am planning to replace two thermostats soon because I had a similar experience with my jeep. Is that what you would recommend me to do?
Thank you for your feedback I made up my mind I’ma get me one just water pump and injectors and those are the most costly but as long as it’s not a lot of fixing all the time should be set
Great video bro, I’m right there with you on the transmission they are the best!! One made
Thanks buddy! Can’t beat an Allison
I purchased an 03 3500 dually about 8 months ago and it only currently has 154k with the 6.6 6 speed and I am currently getting clutch slippage in 6th gear on the highway last night going about 68-70 mph. So I'm not sure if it's low on fluid or if it's gonna need a new clutch assembly however this is my first desiel and I love it. Any recommendations would be greatly appreciated
Thought 2003 were 5 speeds?
@@jonnyg9330 the 01 to 05 Allision 1000 transmission always had physically capability of a 6 speed from the factory as internals go the TCM and valve body limited it to 5-speed, the 6-gear was disabled. There are companies out there makes a 5 speed to 6 speed conversion kit for the older transmission to unlock the 6-gear all needs to be done is a TCM that unlocks the 6-gear and a valve body that able to run it and you will have the same transmission that the 2006 trucks had. The kit that I went with was from Duramax Tuner it was a bit pricey but well worth it
I love the LBZ ran amazing
I bought my 03 gmc 6.6l LB7 and it has a welded water pump, new bosh injectors and studded new grade c gaskets. All done 12k miles before I bought her.
My lb7 has 285k on it and runs great. Worst think you can do with these trucks is race up hills with a load. Heat builds up and causes huge issues. I pull a 16k lb toy hauler. I keep rpms low. Everyone can just go around me.
might sound like a dumb question but how do i go about keeping the rpms low going up and down hill.
Keeping your rpms low going up a grade will make your truck get hot REAL quick.
Injector connectors are also a problem if one goes out the truck goes into limp mode and won’t pull itself
I'm looking at a 1 owner 2003 LB7 with 55k on it, (old man truck) super clean. he only really used it to pull a 10,000 LB 5th wheel camper in the summer. Seems like a good buy, should I be looking out for something with the age and low miles?
Sounds like a slick truck! The only thing to really watch out for would be seals and rubber hoses as they tend to degrade over time, especially if it sits. And of course look for white smoke - indication it may need injectors. You can check for blow by by setting the oil fill cap upside down on the oil fill hole. If it doesn’t move, you’re good. If it jumps off, there’s an issue with blow by, might need head gaskets.
I have this truck you are looking for. Its a 2003 GMC Sierra 2500 HD SLT crew cab short bed (white color with black leather interior and fully loaded), 6.6 Duramax with 1000 Allison trans with approx 55K total miles on the truck. All injectors have been replaced by the dealer at approx 35K miles. I'm the original owner used only to pull my boat. The only issue I'm not selling at this time but you'll never know.
@@1mw4tch1ng Let me know when your ready to sell. the other truck did not work out.
Looking at on 04 lb7 with 180k miles. Looks clean in pics. What are things to check or sounds to listen for when I go see it?
did ya get it ?
Oh my God thank you so much. I’m definitely doing my research. I’m looking for a 2003 sierra Duramax it will be my third gm/Chevrolet whatever technically my second GMC sierra except I just had gas so I need to do my research on the Duramax. it’s my dream truck and I want the right one… I had a 10 Silverado GFX that I absolutely hated but I love my first 2003 GMC sierra
Ive heard these overheat alot in the summer while towing i know about the injectors and water pump
overheating issues are 04.5-05, LLY motor, you can figure out what motor a truck is by using a vin decoder
I love my 04 LB&. 278K.
The lb7 is a great motor put you an air dog or fass lift pump and some brand new bosch injectors and you will get 300k to 400k miles out of injectors. My 2002 lb7 has 487k miles on it and it stills runs like it was brand new if not better. I keep all maintenance done on it. I've put a small efi live tune, arp stud kit, 5" straight pipe exhaust, air dog2 lift pump, bosch injectors, Pcv reroute. Truck is solid with no issues besides changing tension pulls every 100k miles.
Wayne Reinhart pcv reroute? That's in lly/lbs
@@1ronman1 you are correct I done that on my 06 the one I got rid of and got my 03 lb7 which is a very reliable truck
Yeah lb7!!!
Don't forget glow plugs and engine code p0380 its a nightmare to fix especially if your glow plugs break off in head
That makes me puke in my mouth!!:)
My lb7 2500hd now has 98,000 miles plenty of power. I also have a 04 Chevy 3500 with the 8.1 gas very good truck both sound good . But I had about 16,000 lbs with the gooseneck behind the 2001 2500HD lb7 going up a steep hill and it sounds awesome. It has more toque pulling power then the 8.1 gas for sure. But the 8.1 gas in the 3500 does handle a heavy load a lot better. The lb7 Duramax gets twice the fuel mileage as the 8.1 gas . lb7 gets 23 mpg highway 15 mpg city ; the 8.1 gas get 10 mpg highway and 9 mpg city.
I just recently bought a 03 gmc 2500 lb7 and noticed it’s leaving a small drip of oil in the drive way. Thoughts anyone?
Anyone have wiring issues? I’ve had no issues but some connectors look a little fragile I assume from all the heat cycles
Anyone know anything about these transmission's? Mine shifts good every now and then. Last night on my way home from work, it couldn't go past 40mph. I changed the fuild and filter not even 1,000 miles ago.
I was told it could be a bad TCM or a bad shift solenoid.
Truck has 168k miles
Its a 2001 lb7 4x4
Check out your neutral Safty switch on the side of the transmission
what is high mileage on this eng?
I absolutely love my LB7 but the LBZ is my dream truck for it's buildability and performance.
Bhswarrior94 I’m 17 and currently own an LBZ With 198,000 miles on
I’m new to diesel, I sold my cammed gasoline for my single cab dually (2001). I’ve been told injectors we’re done recently and it has no leaks! I was wondering if yours smokes a bit from the exhaust? I asked the seller and he said since it was tuned (diablo) so it was normal just wondering if that’s true or if you had and advice??
Hey how's it going man, have you gotten answer to your question yet?
Christian Flores unfortunately not, I’ve been doing a ton of research and using many different fuel additives. I’m stuck between a stuck or failing injector and I think I can rule out a coolant issue
@@trey1sauce165 is it a white puff of smoke on start up?
Christian Flores when I start it up it doesn’t smoke, it smokes once it’s warmed up... specifically when I get off the highway or something and I pull into work and I come to a stand still it’ll start smoking out the exhaust pipe. Previous owner said just rev it a little and it’ll clear it out which usually does it then if I sit too long I’ll need to clear it out again?
@@trey1sauce165 I put 48 injectors in my truck over for yours but I did put 700000 km on the truck
Hey bro am looking to buy a 2002 duramax, 6.6, how good are they and whats the highest mileage it can reach??
If you stay on top of small issues, should be able to reach 350k+ at least before needing a major overhaul of the engine and/or transmission. These trucks are built solid and keep their value! Around here it doesn’t matter if it has 200k or 300k miles, they are priced the same
I got me a 2002 crew cab 2500HD and love it. Stock truck and very dependable. Bought it 7 months ago. Mileage is around 16 mpg city driving. No idea on hwy driving. I have run it in -60 degrees weather north of Fairbanks in January this year. No issues and 260K miles.
Yeah my lb7 has 308k on it with no codes or anything and it still runs and drives amazing
999,999 then it turns into zero's again.
if it smokes it will need injectors the stock ones are garbage get the bosch injectors and you may need to replace the injector lines as well. now that mine is fixed it runs awesome.
Bought a new 2003 duramax LB7. At 117,000 miles had to replace injectors. Dealer says out of warranty and never heard of injectors going bad! Total cost right at $5,000. Ouch. But the dealer said I’d never have to worry about injectors ever again. At 177,000 miles injectors are bad again? Can’t be! Chevy dealer now out of business. Found a new Chevy dealer. Good news, price hasn’t gone up. Another $5,000. OMG. Also have replaced the canister/housing around the fuel filter twice. Looses prime unless you always park nose downhill. Always been a Chevy fan but I just can’t stand anymore! Side note: each time only 2 or 3 injectors were bad, but because of design, you have little choice but to replace them all.
Tom Marshall the stock fuel filter housing is known to fail over time most people just delete it and put an aftermarket lift pump that has fuel and water filter with it. That dealer lied injectors don't last forever they wear out over time and will be replaced or rebuilt
What about the oil pumps??
How does the lb7 do with hauling cause I'm looking at one to haul my c10 around
Joshua Palacio they haul great like any other dmax
@@SyrupCraft6 ok thanks
I have a tuner and in the tow setting I get in around 27mpg on the highway
@@dirtbagleftist1688 thank u
Injectors wouldn’t be an issue on any LB7 or any duramax if you install a lift pump
Agreed! Do you like FASS or Airdog?
Dustin T I don’t know I guess a FASS because they have an air and water separator
I’ve never had a problem with injectors my uncle has a 02 with 400k miles never needed injectors
I am rebuilding my 01 LB7 had machine work done and the whole 9 yards, this truck had 300k when i put it in the shop. i've done some research and seen where duramax across all gen's have had issues with cranks snapping not a common issue but still something to be aware of. with that being said i'm rebuilding this truck back all stock, should i buy a new crank or would it be safe to use the old one? any advice on this subject would help please
How many miles your truck have on it
Currently around 216k
I have a 2002 duramax it’s fine when you drive it normally but when you floor it’s like it bogs down and we can’t figure out the problem
clogged fuel lines
Air filter or leak in your system
Get the fuel filter changed, 9 out of 10 times when someone tells me this I end up fixing it by changing the fuel filters.
Add a air dog fuel pump
What about not adding horse power but pulling a heavy toy hauler
I just bought an 02 Sierra 3/4 ton with an LB7 mated to a 6 speed manual. So far I’m really impressed with the truck. This is my first truck and my first diesel, though I’ve driven and worked on tons of trucks I’ve never owned one. The two times I’ve calculated the fuel economy, I got 18.05mpg then 18.45mpg. For a big truck that seems really good. I’m hoping with some babying, that it’ll last me a long time.
That’s awesome man! You hardly hear of a gmc with the 6 speed manual. Truly a rare one you have there buddy
I have 07 Classic with LBZ.
Near me a dealership has an 03 Sierra Duramax with 118k on for it 12k. kinda tempted
If you fix these issues these engines are bulletproof and last as long as the Cummins diesel!
Ground wires , transfer case pump rub, hub bearings and front end are also weak spots.....
What will cause air in the fual
Leaking your fuel system, 90% chance it's leaking in your fuel filter assembly where the primer pump is
agree with dr. fishing, other than dry rotted fuel lines, the filter housing is one of the worst pieces in the fuel system. replaced mine with a new one from "dmax store" a few years ago and by the next winter the truck wouldnt start after 12 hours from loss of fuel system prime. due to these trucks not having a lift pump, the cp3 sucks fuel through 20ish feet of hose depending on the model, any little leak or crack in hoses or just the vacuum alone introduces air into the fuel. install a lift pump and bypass the stock filter all together. havent had an issue with mine since.
Your boyfriend trying to suck off the exhaust pipe at night..jk bud there is a leak injectors return line cp3 fuel rail fuel filter housing (would see it externally) or maybe you or someone else changed fuel filter and didn’t prime her before take off? Good luck
leaky fuel head will let air into the system you will have to hand pump it to get your pressure up so you can start the truck and if you let it sit for a while like over night you will have to pump it up again. it holds pressure while your driving
Not well one duramax motors. Had powerstrokes 7.3 mainly. But I bought an 02 gmc lb7, ran good when I bought it needed a water pump, I replaced the pump for 385 I wanna say. I did hydro boost myself and some other stuff aswell. But recently it will not start. I did new fuel pump and new primer pump and new fuel filters, hell new batteries and a new starter. She cranks just fine just will not start. I love my truck it’s had a lot done to it. It was all banks performance parts. I have after market head studs and everything else you could think. I bought the truck with a steal at 6k cash money. And it has definitely had over 20k worth of money put into the motor alone. Just was wondering if anyone knew anything about why the hell my coolant reservoir is holding a ton of pressure after I leave it plugged up for a few days. I left town for about a 3 days and just didn’t realize I left it plugged into for the block heater the day I got back went to start it, and remembered I needed washer fluid so when I did the washer fluid noticed I was a tad low on coolant went to add some. And when I barley loosened the cap the fucking thing launched at me like a bat out of hell. Coolant went everywhere
Was told I would been injectors soon at just over 100K
Now over 250 with no changes
Recently noticed my oil pressure drops at idle after it’s warmed up good
Having it checked this week and hopping for the best
How low was it going? What was the fix?
I’m looking into purchasing a 01-02 LB7 with the Alison, I live in western Pennsylvania most of our used trucks are rusted out so I’m searching down south. This would be a secondary vehicle for me so I’m not concerned with low mileage, what’re some things I should check? I have some experience with diesel vehicles as I currently own a vw TDI but after getting rid of my ram 1500 I’ve decided it’s time for another truck and I’m torn between a Cummins or duramax.
I have a 2004 lb7 80k orginal miles Clean TEXAS title . Nothing wrong, new tires. New shocks new inner and out tie rod ends (KRYPTONITE), side view mirrors replaced as well.. I have it for $18.500 . I live in Fort Worth TX
You forgot to mention: Front end suspension SUCKS!; The engine block coolant plate gasket (buried behind the downpipe) that will fail and leak after about 160,000 miles; random electrical issues with the dash gauges; a fuel filter that is a ROYAL PAIN IN THE ASS to change (anytime you need to remove a fender well cover just to perform ROUTINE maintenance... IT'S A SHIT DESIGN) and horrible fuel efficiency when under a load. All of these things can be fixed with aftermarket products, but GM/Isuzu should have made a better engine to begin with.
Hey I have a 03 6.6l . Crank no start, do you have any tips ?
Calgary Framing Crew cam sensor. If not air in the feul
@@aaronwilton8738 ,where is located the cam sensor ?
change your fuel filter and while the filter is off check the fuel head and change all the o rings about 10.00 for the kit and they will give you a metal bleed screw instead of the stock plastic one also check the o ring for the fuel filter see if it needs to be replaced it might leak if put on too tight try priming the fuel pump on top of the filter head it may take as many as 50 pumps to pressurize the system. When pressurized you should be able to start the truck and can drive the truck if you let it sit over night you will need to pump it back up to start, boy what a hassle. if the o ring kit does not work and you are still losing pressure try replacing the fuel head get a stock one i got mine from amazon and the fuel tubes were not the same as the stock one and i had to modify the fuel line and make it longer now my fuel problem is solved. i have an 04 lb7
@Calgary Framing Crew did you resolve your issue? I have the same problem right now.
I got my 01 in 06 w/88,000mi and have been running it on straight vegi oil since. Just hit 240,000mi with no major issues. Belt tensioner had to be replaced twice. Alternator at about 200,000mi, looked like the original. Thermostat went out a few thousand mi ago. Tie rod ends recently. The driver door is falling apart. Personally I wouldn't go newer than 04 because they aren't able to run on used fryer oil, but I'm sure they are nice. I've been running the Bully Dog tuner the whole time, in tow setting I can get in the high 20's mpg carrying 250 gallons of fuel.
What do you use to filter your fryer oil? I’m told water remains in suspension and can ruin IP.
How common are fuel injector failures? I want one of these, but I think I'd have to take a loan out for injectors lol
bought my 2001 lb7 in 2012 with 150,000 miles, it ran fine not towing, but pulling up a hill and towing had a code (dont remember exact code) but was for "massive fuel leak" had it checked out at a dealer and was either cp3 or injectors. well i researched injectors, new bosch ones were about $350 each, replacing 8 gets a bit expensive and add on another $600 or so for new fuel hardlines. well i found "pensicola diesel" (believe thats how its spelled, anyway dont believe "all" the bad reviews i spent about $1500 for 8 complete rebuilt injectors, 8 glow plugs and it came with valve cover gaskets. i didnt get new fuel lines either, just cleaned them out really well. now its almost 2020 and ive put on 25,000 miles (mainly towing, its not a daily driver) and still running well, however at the time i still had my fuel leak issue, it was the cp3 going out. if you are really interested in one of these duramax's the best thing to do is invest in a lift pump. i put in a FASS 150gph for about $600, best upgrade ever for ANY dmax, just dont use their blue fuel line, had to replace it under a year from dryrot and cracking. to my knowledge the duramaxes still dont use a lift pump and there lies the root cause of the issues. cp3 working to hard sucking and pressurizing fuel, which in turn leads to low fuel pressures at the injectors causing early failures. take care of that and you got a solid motor
@@moparkr Ok, I have two questions, one of which is just a general question. One, what is injector haze? And two, what does a lift pump do?
Justin E injector haze is white smoke from the exhaust from unburnt fuel that can be caused by injectors sticking open. A lift pump just supplies fuel to the high pressure fuel pump and pumps like airdog or fass add filtration
mopar1969kr the cp3 on a duramax doesn’t need a lift pump. It’s designed to use vacuum. The vacuum system isn’t why LB7 injectors fail, oem injectors cracked and leaked fuel into the crankcase and use a vco style nozzle that wears out over time.
stock ones on the lb7 will always fail sooner or later go with bosch about $3,000 and you may need new injector lines as well
I'm looking at buying a 03 Duramax that needs a new motor
3 times replaced my injectors twice wawa put gas in my tank and i didnt realize untill she was puffing white smoke now i got 30 over there badass and 5 to 6 speed conversionpops a master tech though by the third time all by my self about 9hrs total both banks all 8 injectors
Nice! I’ve heard that in all honesty it isn’t necessarily hard to swap them, just a lot of stuff to remove and remember how to put back. I’ll be calling you if I ever need a hand with them! 😂
@@DustinTi just came across this i deleted my fuel filter and i found out the stock housing has a fuel heater element in the housing which the black oxide fails and crapy connectors and its after the filter will send the rust into the ficm then into you cp3 theninto your injectors no joke 263k miles
Gail banks injectors are the best
I have 01 duramax w/little over 200 K got new injectors under warrinty I just paid labor sweet bocsh too.I run a power programer 3 and have had a very reliable truck. No need to up grade at this time. Lol
Wow, it was covered under warranty? How did that work?
@@DustinT It was a recalled by general motors. I missed the date but was under the miles.
Found a 2002 gmc sierra 2500hd 6.6, extended cab with an 8ft bed with a topper. 2 sets of rims with brand new tires on all rims. It's got 234xxx miles with new injectors...he wants 13 grand. No rust and no mods. Does anyone think that's a good deal? I know zero about diesel trucks
How y’all feel abt a 2004 Chevy 56k miles one owner their asking 29k for it
Lbz best power and reliability.. I am the very proud owner a slightly tuned panty droppin lb7 exhaust tunes injectors studs lift pump and built trans...almost gave myself wood listing that shit..I did my injectors at 149000 so what I’ll have to do it again at 300,000ish maybe?!?! The lb7 injector “issue” is blown way out of proportion by powerstroke idiots and Cummins guys can’t knock Cummins but duramaxs are the fastest when built/tuned Cummins makes high torque and power and powerstrokes just make a cute whistle sound...done ranting lb7 best exhaust sound out of all the duramaxs period
Tyler Stops I'm at 200k on my injectors. Every time I replace fuel filter I dump sea foam in it
I don’t have an LB7 but my LBZ has 420k!
looks like the mice ate your insulation in the same spot they ate it in my truck.....
12v cummins comes with a million mile warranty dont
Got one with only 3 oil changes 60k mi auto crew cab 2wd dually for sale duds.
ah les degs du camion lb
It seems EGR issues are common.
Only on Cali trucks any other LB7s are emissions equipment free
L5p is the best
Yea say that when you start having problems with all the emission crap that are on it you will think differently. Today diesel Engines are nothing but money pits. the pre- emission engines are so much better and easy to work on
All this common issues can be solved whit a C ...... CUMMINS
Then you'll start blowing through transmissions.. No thanks.
But I want a V8, not a upsized diesel RB26DET
Dr. Fishing Cummins doesn’t make transmissions
@@millerbartlett3453 I think its obvious the OP is talking about a Ram with a Cummins.. Chrysler builds the hunk of shit trans behind the Cummins.
Should have bought an LBZ It’s what I have
🤣
He is wrong on everything he has said