Note this video was published previously but we had a torque spec wrong so we decided to fix that and republish. Thank you for your continued support! We will do our best to continue you bringing you quality content to help you with your vehicles!
Also, if they failed to install the pump with the piston on top dead center. How would I tell. He gave me back my truck leaking gas. Took it back to him and now I'm having injector issues because he said he replaced injector 8 due to this pump failing.
This is why im glad I wen with a 2002 Sierra it's old and not as beautiful as the newer trucks but when something does need replaced it's a straight forward repair, im not at all knocking anyone who owns a newer truck they are gorgeous and powerful, but with older ones there are less electronics parts to deal with, thank God for people like you who share their knowledge to help confident DIY'ers to make their own repairs and save thousands 💯👍🏿
Thank you! I just completed this job on my 2014 Silverado with 5.3. Went smooth thanks to your video. I used all gm parts off rock auto. Saved a ton vs dealership. Took me under 3 hours start to finish. I appreciate the help!
If you don't mind me asking how is everything working still? I need to do this job as well as injectors/seals on mine soon and I was going to get gm genuine parts on rockauto but was a little worried about buying parts on there.
I watched this video last week because I’m about to tackle this job. It’s like you guys knew I’m doing it this Saturday and reposted it just so I wouldn’t miss it lol.
Lol glad to help! We found that we had a torque spec wrong :( It was painful to take down at 120K views but we didn't want anyone having problems so we fixed the error
I paid my truck off 12-21-21. My truck went into a limp mode and would not go on 12-23-21 so I took my 2015 GMC sierra 1500 truck to get it fixed on 12-30-21. The #1 cylinder was misfiring the camshaft was found to be bad from CMC Automotive in Langley SC. When I found out the repair cost was going to be $7500 I called around to get other prices. Found that where I bought my truck from in 2015 from Johnson motors in Aiken SC could do the repairs for $4000 + or - $200. It took several weeks for them to get parts to fix it. I got my truck back on 1-19-2022. Drove it until 2-14-2022 and it did the same thing. They repaired it. I got it back 3-11-2022. Drove it until the same thing happened again on 3-18-22. Took it back to get it repaired and they couldn’t fix it after having it for two weeks. So GM said they were going to put me a new 5.3 engine in it. Every since 4-19-22 I have been waiting for it. Every week I get a no ETA. I have been without my truck pretty much since 12-30-21. Is there an attorney I can talk to about this matter?
FWIW According to the factory manual, the cover is not unbolted, it is removed with the intake. The intake manifold bolts are loosened, then slid forward. Then the harness retainers in the back can be accessed and removed (what you ended up doing). If you dont have a factory repair data, Mitchell1 DIY is cheap - $60 for one vehicle for 4 years. It has full factory shop data..
My 2018 sierra had the same problem both duel pumps went out and the warranty only covered the rear fuel pump so I had to come out of pocket 1800$ to fix this problem!!!! Warranty definitely sucks for this repair 😢
Awesome video! I'm still banging my head why the need for cylinder 1 to be in top dead center on the exhaust, how does that relate to the high pressure pump? To my understanding, the fuel pump simply pumps fuel into the lines and the injector takes care of introducing fuel into the cylinder.
The high pressure pump is mechanical not electric and is powered by the lifting action of the camshaft. A camshaft has a low and high spot. Think of the shape of an egg spinning on its horizontal axis. You want the camshaft lobe in the "low" position in order to relieve any tension on the pump.
Could you please elaborate on how to know when it’s on the exhaust stroke? About to do this next weekend and that’s the only part I’m worried about messing up on. Great video though!
Mine is a 2017 Ltz 5.3 lt It looses power while driving to the point where it will turn off, I switched the battery still does the same thing Idling sometimes it starts to shutter I sometimes punch on the pedal and it doesn’t respond as it should , it starts to take off then looses power.
Okay, so would a hp fuel pump failure cause a no start issue? Sons truck cranks and acts like it wants to start but then just turns over. Fuel pump in tank runs. Fuel is making it to the hp pump. But wont start. Has a P12a8-00 "fuel pump control status signal message counter incorrect" code among other unrelated BCM codes due to led aftermarket headlights. How do you verify a hp fuel pump failure (or an in tank pump failure since there are no ports to attach a gauge)?
Question, does the cam just need to be at the lowest position to install the new pump? Could someone maybe put an indicator in and rotate until the lowest reading is acquired?
If I’m going to install the same high pressure pump again without putting the first cylinder is it ok? Or it’s mandatory whether if it’s new or old? Because the old sensor on the pump and I had to remove it to fix the sensor then I heard about this recommendation 😅
lol. Well, it would seem to me that if it runs without it, it's fine. I don't only say that to be funny. What I would check for is if the bolts run all the way down. They may reach torque, but that shield may have a certain thickness that the bolt is designed for. If they bottom out, you can grind that unthreaded end of the bolt off, and reinstall. That isn't really a bracket, so much, as it is a shield to protect the delicate pump when you're installing it, or swinging an engine around during engine R&R. So, with that, if you can live without it, It'll probably run fine for you. Disclaimer: YMMV.....
I drive a 2015 GMC Sierra 4x4 5.3 can I do the same transmission flush like the one you did with the Silverado 5.3 can I flush the same way please respond thank you keep making those videos
It should be the same process but really, just a drain and fill and filter change every 30k miles should be good and a lot easier. Do you have the 6l80 transmission?
Is cause the cooler lines that connect to the ac condenser one side came off an drain all the fluid on the road had to drive out of the freeway it happen twice so that's why I wanted to flush it or just do the transmission an filter change please respond thank i don't know what transmission it has where would I find it
How common of a failure is it? Is it on the first few years or all of them? Lol. I really don't want to have to do mine.... but I know I'll probably have to at some point.
No surprise it’s not covered under warranty. They know how severe it could be and how much money it could cost ….it won’t kill you , so therefore they have juked yet another issue with their trucks
I'm pretty sure our trucks do not have a serviceable filter but I have not looked into it much yet so could be wrong. From my limited research I believe it is in the fuel tank itself.
@@user-lp3cf5yn5b (low pressure pump) tap fuel gauge into line, under bed rail by fuel pressure sensors. (high pressure pump) tap fuel gauge into fuel rail before injectors
I don't have any codes ,it just has a small stumble to it when taking off ,and the tranny was just rebuilt so its not that , its almost like a run out of has deal that's why I'm asking ...you think the high pressure pump could be going , it has 178000 on it
@@mikemuniak4711 usually you'll notice it at the top end and not pulling away. Don't rule out the transmission or torque converter, things can be rebuilt wrong sasly
I never had a check engine light cone up but mine has failed... and unfortunately can't find this part ANYWHERE! They have apparently discontinued this fuel pump and there are none in stock and the supposed new ones aren't even in stock at manufacturer!! Chevy went from great vehicles to they are the biggest JOKE bc even the newer trucks are trash having failures within the first 10k miles
Note this video was published previously but we had a torque spec wrong so we decided to fix that and republish. Thank you for your continued support! We will do our best to continue you bringing you quality content to help you with your vehicles!
I just had a mechanic tackel this job, does this fuel pump cause injectors to fail?
Also, if they failed to install the pump with the piston on top dead center. How would I tell. He gave me back my truck leaking gas. Took it back to him and now I'm having injector issues because he said he replaced injector 8 due to this pump failing.
is this essentially the same process as a 2013 Chevy Malibu
Best sequence with very organized, technically complete explanation for each step taken throughout the process I have ever seen. TY Sir.
This is why im glad I wen with a 2002 Sierra it's old and not as beautiful as the newer trucks but when something does need replaced it's a straight forward repair, im not at all knocking anyone who owns a newer truck they are gorgeous and powerful, but with older ones there are less electronics parts to deal with, thank God for people like you who share their knowledge to help confident DIY'ers to make their own repairs and save thousands 💯👍🏿
Thank you! I just completed this job on my 2014 Silverado with 5.3. Went smooth thanks to your video. I used all gm parts off rock auto. Saved a ton vs dealership. Took me under 3 hours start to finish. I appreciate the help!
If you don't mind me asking how is everything working still? I need to do this job as well as injectors/seals on mine soon and I was going to get gm genuine parts on rockauto but was a little worried about buying parts on there.
Everything is great. No leaks, no engine lights. Runs perfect. Don’t hesitate to use rock auto. Have used them for years with no issues.
@@bmanbarnheart4158 Thanks for info!
I watched this video last week because I’m about to tackle this job. It’s like you guys knew I’m doing it this Saturday and reposted it just so I wouldn’t miss it lol.
Lol glad to help! We found that we had a torque spec wrong :( It was painful to take down at 120K views but we didn't want anyone having problems so we fixed the error
Wow I was wondering if mine was failing and you described exactly what my truck does lol thanks
Glad to help!
I paid my truck off 12-21-21. My truck went into a limp mode and would not go on 12-23-21 so I took my 2015 GMC sierra 1500 truck to get it fixed on 12-30-21. The #1 cylinder was misfiring the camshaft was found to be bad from CMC Automotive in Langley SC. When I found out the repair cost was going to be $7500 I called around to get other prices. Found that where I bought my truck from in 2015 from Johnson motors in Aiken SC could do the repairs for $4000 + or - $200. It took several weeks for them to get parts to fix it. I got my truck back on 1-19-2022. Drove it until 2-14-2022 and it did the same thing. They repaired it. I got it back 3-11-2022. Drove it until the same thing happened again on 3-18-22. Took it back to get it repaired and they couldn’t fix it after having it for two weeks. So GM said they were going to put me a new 5.3 engine in it. Every since 4-19-22 I have been waiting for it. Every week I get a no ETA. I have been without my truck pretty much since 12-30-21. Is there an attorney I can talk to about this matter?
That stinks 😔 you should definitely get a lawyer involved
This was fantastic, thanks for sharing.
So glad the motor put up a code, otherwise you may never have known until it was too late! Merry Christmas
Glad to help! Merry Christmas!
FWIW According to the factory manual, the cover is not unbolted, it is removed with the intake. The intake manifold bolts are loosened, then slid forward. Then the harness retainers in the back can be accessed and removed (what you ended up doing). If you dont have a factory repair data, Mitchell1 DIY is cheap - $60 for one vehicle for 4 years. It has full factory shop data..
Wow, No easy repair. Thank GOD I have a Zurich Extended Warranty.
My 2018 sierra had the same problem both duel pumps went out and the warranty only covered the rear fuel pump so I had to come out of pocket 1800$ to fix this problem!!!! Warranty definitely sucks for this repair 😢
This is an awesome video. Thank you for sharing with with us.
Awesome video! I'm still banging my head why the need for cylinder 1 to be in top dead center on the exhaust, how does that relate to the high pressure pump? To my understanding, the fuel pump simply pumps fuel into the lines and the injector takes care of introducing fuel into the cylinder.
This is a GDI system. It requires a lot of pressure, in comparison with older systems.
The high pressure pump is mechanical not electric and is powered by the lifting action of the camshaft. A camshaft has a low and high spot. Think of the shape of an egg spinning on its horizontal axis. You want the camshaft lobe in the "low" position in order to relieve any tension on the pump.
I think I will have my mechanic do this for me if my fuel pump goes bad. Lol
That works too! :) He'll probably watch this video haha
How do you diagnose a bad pump? I just noticed smell of gas coming from my oil dip stick
Commenting to find later
Could you please elaborate on how to know when it’s on the exhaust stroke? About to do this next weekend and that’s the only part I’m worried about messing up on. Great video though!
Mine is a 2017 Ltz 5.3 lt
It looses power while driving to the point where it will turn off, I switched the battery still does the same thing
Idling sometimes it starts to shutter
I sometimes punch on the pedal and it doesn’t respond as it should , it starts to take off then looses power.
Where can I find the manual you where following, great video very informative
What if you don't put the cam in proper position when installing pump
Awesome video.
Do all 5.3 have this high preassure fuel pump on top of the fuel tank fuel pump OR does it just apply to flex fuel 5.3s ?
Did your codes and afterburn come back?
How long did the fuel smell last on your dipstick?
Oh Boy! What did I buy?
Junk I hated mine I'm buying Toyota from now on.
Okay, so would a hp fuel pump failure cause a no start issue? Sons truck cranks and acts like it wants to start but then just turns over. Fuel pump in tank runs. Fuel is making it to the hp pump. But wont start. Has a P12a8-00 "fuel pump control status signal message counter incorrect" code among other unrelated BCM codes due to led aftermarket headlights. How do you verify a hp fuel pump failure (or an in tank pump failure since there are no ports to attach a gauge)?
Possibly blowing black smoke on WOT? Customer has the same code, black smoke at WOT and idle. Running very rich
I don't believe mine did but I caught it early
Question, does the cam just need to be at the lowest position to install the new pump? Could someone maybe put an indicator in and rotate until the lowest reading is acquired?
Yes, gm has a tool that sits inside and when it bottoms out you know you are at the lowest point of the fuel lobe
It'll be under crazy spring pressure when you're removing it. Why not just find TDC of exhaust stroke cyl #1? There is a good reason for that.
Awesome 👏🏾
Thank you 🙌
I have a 2015 with a leaking fuel pump did you see the recall for this
Not sure about a recall, do you have a link to it?
I wonder what it would take to delete the high pressure fuel pump and swap from DI to port injection like on the previous gen LS engines.
That sounds like a pain lol
Is it possible, yes. Is it worth the amount of time, parts & $$$, no. You would be better off installing an entire Gen IV system into this body style.
Just needs everything but the block... that's all it would take.
How do I find top dead center on exhaustroke
I’m getting P0090 and 91 when it’s snowing/slushy wet outside. I had the high pressure pump replaced problem still persists. Any suggestions?
Ryan, I just bought a truck with the same codes. My mechanic is replacing high pressure fuel pump. Did you ever get those codes to go away? Thanks
What if after installing you get codes for the fuel rail pressure circuit and injectors 1-3-5-7
no codes coming up but have strong smell of gas coming from top of motor ?
From inside the motor when I removed the oil cap. Not on top of the motor. External leak could be a fire risk so get that fixed asap
There was a recall issued on Feb 2015 (#14858), is this the replacement pump that has failed again?
I got the truck with 19K miles on it. Im not sure if it was replaced prior to my ownership
If I’m going to install the same high pressure pump again without putting the first cylinder is it ok? Or it’s mandatory whether if it’s new or old? Because the old sensor on the pump and I had to remove it to fix the sensor then I heard about this recommendation 😅
Supposed to be done regardless 👍
Any update on the hp fuel pump? How’s it going so far ? Because I’m about to change mine out and I’m going to use the exact same brand you used.
No issues!
How important is that black bracket on top of the pump? Already installed the lines and intake 🤦♂
lol. Well, it would seem to me that if it runs without it, it's fine. I don't only say that to be funny. What I would check for is if the bolts run all the way down. They may reach torque, but that shield may have a certain thickness that the bolt is designed for. If they bottom out, you can grind that unthreaded end of the bolt off, and reinstall. That isn't really a bracket, so much, as it is a shield to protect the delicate pump when you're installing it, or swinging an engine around during engine R&R. So, with that, if you can live without it, It'll probably run fine for you. Disclaimer: YMMV.....
I want to tackle this job but god damn man this shit looks terrifying.
It's not too bad, just take your time with it. A shop should not charge a ton to do this tho
This is super easy I assure you
I drive a 2015 GMC Sierra 4x4 5.3 can I do the same transmission flush like the one you did with the Silverado 5.3 can I flush the same way please respond thank you keep making those videos
It should be the same process but really, just a drain and fill and filter change every 30k miles should be good and a lot easier. Do you have the 6l80 transmission?
Is cause the cooler lines that connect to the ac condenser one side came off an drain all the fluid on the road had to drive out of the freeway it happen twice so that's why I wanted to flush it or just do the transmission an filter change please respond thank i don't know what transmission it has where would I find it
Hey where did you get the summit white headlights? Looking to do this to my truck.
I had the chrome painted :)
How and why did this fail? Is this issue common? Is there an “upgrade “?
It is a common issue. Not sure of the cause except bad internal seals. I have not looked into upgrades for it
I blame the EPA for everything wrong with cars these days, lol.
So the description leaves out the torque spec for #2 for the new fuel line...is there no specific torque?
How many ugga dugga's should I go? Lol
How common of a failure is it? Is it on the first few years or all of them? Lol. I really don't want to have to do mine.... but I know I'll probably have to at some point.
Though my experience will differ as I have the 4.3L. I'm sure it's close enough with a few quirks.
Can you tell me the torque specs for the hight pressure pump ? Great video sir
They are linked in the description
No surprise it’s not covered under warranty. They know how severe it could be and how much money it could cost ….it won’t kill you , so therefore they have juked yet another issue with their trucks
Did you find the part? Bc I can't find it anywhere! They apparently discontinued it and I'm stuck?
@@BrandonLee-rb1kp I was never personally looking for it. I’m sure it exists somewhere
Dumb question, but where is the fuel filter located?
I'm pretty sure our trucks do not have a serviceable filter but I have not looked into it much yet so could be wrong. From my limited research I believe it is in the fuel tank itself.
There is no fuel filter just the strainer on the fuel pump in the tank
to all watching, please test fuel pressure from both your low pressure and high pressure pumps before you start replacing parts.
How
@@user-lp3cf5yn5b
(low pressure pump) tap fuel gauge into line, under bed rail by fuel pressure sensors.
(high pressure pump) tap fuel gauge into fuel rail before injectors
So I have a 2014 ,can you tell me if on these trucks do they also have a fuel pump in the tank as well ?
Yes they do. Low pressure in the tank, high pressure on the block
So how do you know which one is about to take a shit?
@@mikemuniak4711 my low pressure is still going strong. Had to replace the hpfp once. Depends on the codes you get.
I don't have any codes ,it just has a small stumble to it when taking off ,and the tranny was just rebuilt so its not that , its almost like a run out of has deal that's why I'm asking ...you think the high pressure pump could be going , it has 178000 on it
@@mikemuniak4711 usually you'll notice it at the top end and not pulling away. Don't rule out the transmission or torque converter, things can be rebuilt wrong sasly
did anyone get a raw gas smell in the cabin from the failure of this part
I did not. Not sure about others. If you are smelling fuel be very careful. If there is an external leak that could cause a fire
I never had a check engine light cone up but mine has failed... and unfortunately can't find this part ANYWHERE! They have apparently discontinued this fuel pump and there are none in stock and the supposed new ones aren't even in stock at manufacturer!! Chevy went from great vehicles to they are the biggest JOKE bc even the newer trucks are trash having failures within the first 10k miles
i thought the fule pump was in the gas tank....
the low pressure fuel pump is in the tank. This is the high pressure pump
GM wanted gas engines to be just as hard to work on as diesels.
This one he's replacing is to operate the higher pressure for the direct injection.
Replace this w DOD delete