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Dope. 5 years later this video is the only one that shows a ground going to the computer. Good job.

What kind of cables/wiring?

I'm setting this post 5 years after. Just got an 04 and been having these issues, related the Throttle Body and the Accelerator Pedal Position Sensor and still having the issue. I suspected the grounding but wasn't sure. This will be a good option to try.

i had a question bro if you can answer it i would appreciate it so i just recently cleaned my throttle body on my 05 gmc sierra 5.3 just because i had no check engine light on for it before so after i cleaned it i installed everything back the right way and did the 3 minute idle re learn well tried now when i turn it on it warms up good but once it warms up it starts to surge the rpm goes up and down then when i put it in reverse or drive it revs up and going into gear or to reverse, drive any when i drive it and give it a little pull to see it it feels good i feel good normal power but as soon as i let go the gas now it stays reved up or accelerated then once i come to a stop the idle kind of goes down like slowly and just starts surging again do you think this could be my problem or what else do you think it can be i replaced air filter cleaned my maf sensor do you think this may be the cause of that before my truck wouldn’t do that it would die out coming to a stop though so i would just hold the gas to keep the idle from dropping all the way and stalling the truck but now it doesn’t let me even do that cus when i try it revs up on its own until i drive off so we ended up trying a new tb but i guess that didn’t work either , some shop said i needed a tune up and that didn’t fix anything either , so im over here trying to find something do you have any clue what can cause the rpm to surge go up and down after warming up , but when they did the tune up at a shop , they did my spark plugs , spark plug wires and cleaned my injectors thinking it was that and nothing it still kept doing same thing so do you know if this is related a mechanic told me that it can be that or my maf sensor but i had replaced that one with a used oem one so i dont know if i want to try another maf sensor but i kinda want to try the tac module sensor i don’t know if it seems like the same problems im having

Funciono, gracias por el video

Once again the escalade is saved by TH-cam ❤️‍🔥

ok so probably about 6 years i battled this and issue, had numerous mechanics look at it. followed up by changing alternator, tps, wiring harness to tps, harness to control module, map sensor, checked grounds, even the turn signal switch, all what mechanics told me was wrong. i could drive it it would happen i’d pull over turn it off and one three times and it would be fine for like a month. on accident i was checking how hard it would be to change my cat on bank 2, and noticed my o2 sensor was chewed up. i never got a code for a bad o2 sensor. i changed it and i hadn’t had that problem in 3 years. go figure 🤯

I dislike Chevy for this reason !! It’s a dangerous issue .

Okay so you say you've got a voltage drop I've got a voltage spike does a grounding issue process the same carateristic's

Thank you so much for this info couldn’t find it anywhere else

I have a 2004 gmc Yukon xl, 5.3l… I had the “reduced engine power” for awhile… I put a new throttle body, new acceleration pedal position sensor on the truck with the same problem… I had 2 very good mechanics look at my truck with the same problems…I didn’t think to look at a video from TH-cam cause I didn’t think it would be a video worth watching so I let the truck sit up for almost 8 months (I have another yukon xl)… yesterday I went out to look at the truck, dirty as hell and was about to give up on the truck, but I finally pulled up this video, went out and did everything in this video to my truck and it fired up with no reduced engine power…I drove it around yesterday and to church today… I want to say THANK YOU FOR THIS VIDEO, it helped TREMENDOUSLY!!!!! BE BLESSED

It is a few years later my brothers 03 Escalade has the same problem we are in the process of making your modifications. I own a 2002 Denali Sub that doesn’t have this issue yet. I will install this mod onto my truck once we get my brother truck to work properly. I am wondering how is your truck today? Do you still have your truck? Thanks for this I know that putting out a video is extra effort and I think we all appreciate your time!❤

what gauge wire did you use

Do not put a aftermarket TB on it unless you got access to a good scan tool to update it with the ecm I put my old TB back on after cleaning it real good and replaced the TAC module and grounded like the video and she purring again thx 🙏it did not run right until I replaced that module it syncs the pedal sensor and the TPS!! I knew I was golden when the engine check light never came on

It worked for me!

Right I almost sold mine after it went to the dealer and they couldn't even fix it! They replaced all these things also!!!

Hey man, looks like you did quite a good job, also a good job explaining what you did. Great video!

Good shit.

I have a 2005 Suburban 1500 5.3L that was giving me fits with the P1516 code. I had swapped some other parts (maybe needed or not) including the pedal sensor and throttle body, and even my alternator that was starting to go bad. Running new ground wires seems to have fixed my issue. Thank you!!

I do auto electrical. I believe it's working because your providing the vehicle with proper ground, to the block and body. I don't think the cases to the modules or throttle need any type of ground.

I do auto electrical. I believe it's working because your providing the vehicle with proper ground, to the block and body. I don't think the cases to the modules or throttle need any type of ground.

This is a good idea but doesn’t that ground connect to splice 102 witch also grounds many components?

0:37 “except sale the truck” 😅 my favorite part!

SOMEONE DO MINE!!! ILL PAY!

I am working on a 2003 yukon xl. This will work. Thank you.

Can it be a bad pedal?

Awesome video man thanks! With you having routed a ground to the alternator bracket, do you no longer have to mess with the ground strap behind the block? Again, thanks for the info!

Im dealing the reduced power issue on ny friends 03 tahoe and no luck so far. So glad my 99 Sierra doesn't have these issues, so far.

So where does the ground on the back of the block go to?

Instead of drilling that spot at the alternator can I put it on the bolt beside where you drilled?

I put a 6.0 on my 03 gmc truck starts but it won’t accelerate don’t know what could me wrong

Where did you get your ground wires? What gauge? Tnx

Thank you for taking the time to make this video, I was resetting my code often even while driving. Today I couldnt get rid of the code it kept popping up after resetting it. Followed ur vid did the wiring and jus like that problem solved..What a relief.. Thank you again !!!!!!!!!!!

I taken the ground strap off the back of the motor multiple times.. you just need smaller arms hahaha

I just finished replacing all the intake gaskets... intake manifold, fuel injector gaskets, valve cover gaskets, throttle body intake gasket. Hooked everything up and when I went to start it up, the throttle body was making all kinds of clicking noises. Then the reduced power mode. So I hooked it up to my OBD2 monitor and it threw a P1516 code. I shut it down and put it in ac start mode before cranking and the throttle body began making clicking noises again. I ran around to the front and tried to manually open the butterfly valve, but it was clicking so fast in an open and shut mode that moving the butterfly valve wouldn't budge. I shut it off and cleaned the throttle body with CRC Brake clean... opened the butterfly valve and cleaned top and bottom, but I don't think that had anything to do with it. I went back to put the AC switch with the keys again and while it was making the clicking noises... I cleared the codes. Then I started it up, and cleared the codes immediately again. I then went strait to clear the codes after about 10 to 15 seconds later... but this third time I didn't wait for any engine light to come on.... I just cleared the computer anyway on the OBD2 computer. Then I shut it off. Went back to to the AC switch without cranking it over and cleared the computer again via OBD2 Computer... and just to note.... the 'engine light' that comes on when you're throwing a code had not come on... However, I just cleared it anyway. Then I shut the AC switch off... (and just to be clear... Not the 'Air Conditioning' switch, but the AC switch (When you turn your ignition keys clockwise 2 steps and all the dashboard lights come on). I disconnected the OBD2 computer and started the engine. Purred like a kitten. I've been driving it around for a month now and no codes, no reduced power, no... NOTHING! The throttle body electrical just needed to be reset and for it to re-learn what to do. So.....Before you start going on a wild goose chase to find what is wrong... try resetting the computer with an OBD2 computer.... up to the point when you're clearing the code switch when it isn't even throwing a code. Reset your throttle body with the computer and give that a try before you get so mad that you want to take a hammer to the engine. It may just need to be reset in order to start fresh like it's new.... If it worked for Randy on South Park when the internet was overloaded... It just might work for your car... without the ectoplasm!

I sold a 04 Suburban for this very reason. Glad I sold it.

Didnt work for me

Brother….TY. Fantastic video. Lost ground melted my fuel relay in engine compartment. Figured it out. New / used relay box now gotta du3 the grounds.

You are an elite hacker.

Great video

Where you from boss man

Thank you for making this video. I have an 05 Silverado 2500 HD 6.0 LS. I have been battling reduced power mode for nearly two years on and off. I have replaced everything correlated to the issue, including changing the throttle body 3 different times through warranty swaps. I followed this video to a T. Did it Yesterday 7/31/23. I am hoping this takes care of my problem. No issues so far. Unfortunately I will need to drive this for quiet a while, but I feel really good about this. GM in these years are known to have weak grounding issues and I think this video really illustrates the importance of having a good ground for your vehicle. 777boatman if your ever in Tucson AZ I will buy you a beer brother, because I think you saved my ass! Fingers crossed. Thanks again!

This WORKED!! Thank you so much for this

I want to thank you for this video. I was having the same issue with my suburban and what you did I did and so far it has done the job. Thank you thank you thank you

Hello does this setup also for codes po120,po220,po1516, and po2135? Can you send me the exact point of the green safety ground? From what I can see you ran from the battery to the TAC, TAC to the firewall. Firewall to the alternator. I have the big black negative cable from the firewall to the alternator.

I hope this fixes my problem, I have 89 c1500 with a 6.0 drive by wire,no check engine light,but it will rev in park,I put it in drive and it won’t accept throttle.but if I let the engine get to operating temp it will work.

Great video!! Thank you!!!

6/2/03 I have a 2004 silverado 5.3L with that same problem and 3 mechanics couldn't fix it. So I did your ground set up and it's been working fine . Thank you!!!!!

P01516 2003 Silverado 👀

Appreciate your time