Jump to content

2015 GMC 1500 stumble no power on acceleration

Jack4909

By Jack4909
in Troubleshooting & Recalls

Recommended Posts

Jack4909 Enthusiast

Jack4909

Posted
Posted

We bought a 2015 GMC new 2 years ago yesterday. At just under 60000kms it started stumbling on acceleration intermittently (no power). It's like it's stuck in v4 mode had it to the dealership lots of times can't get it to repeat. Wont throw a code.This has been going on for five months now. The dealership did put a recorder in the truck and we were able to record two events but now it's with gm engineers for a month and half now. This is very frustrating as it does it when trying to pass and when turn a corner. If you don't know that this happens you could get yourself in trouble real fast. Have pulled out to pass and had to pull back in several times. Nothing like getting you ass handed to you by a minivan.

 

I have owned GM all my life but this is the first new truck. What a disappointment. First the paint falls off gm won't cover then this.

GMCustomerService Senior Enthusiast

GMCustomerService

Posted
Posted

We bought a 2015 GMC new 2 years ago yesterday. At just under 60000kms it started stumbling on acceleration intermittently (no power). It's like it's stuck in v4 mode had it to the dealership lots of times can't get it to repeat. Wont throw a code.This has been going on for five months now. The dealership did put a recorder in the truck and we were able to record two events but now it's with gm engineers for a month and half now. This is very frustrating as it does it when trying to pass and when turn a corner. If you don't know that this happens you could get yourself in trouble real fast. Have pulled out to pass and had to pull back in several times. Nothing like getting you ass handed to you by a minivan.

 

I have owned GM all my life but this is the first new truck. What a disappointment. First the paint falls off gm won't cover then this.

 

 

 

Hello Jack4909,

 

We apologize for what you've experienced and want you to know that it is important to us you have a positive experience with our products and dealers. We would be happy to forward this concern to your GM Regional Customer Care team, since our systems are set up to assist U.S. customers. If interested, please send us a private message with your VIN, contact information and servicing dealership. We look forward to hearing from you soon.

 

https://www.gm.com/privacy-statement.html

 

Kindly,

 

Anthony

GM Customer Care

Jack4909 Enthusiast

Jack4909

Posted
  • Author
Posted

Anthony

 

I have went and found a different dealership they seem to have a general idea what is causing this problem. To give you an idea of the difference I have the shop foreman telling me at the old dealership that there is nothing wrong with the truck. I go talk to the service manager at the new dealership set up a appointment and as I was leaving a mechanic walking across the parking lot stops me and says that truck is not running properly. What would you think. I have been in contact with gm costumer service Canada that's like beating your head against the wall it hurts and it's a waste of time. So far this new dealership is restoring some of our faith in gm service.

  • 3 weeks later...
Jack4909 Enthusiast

Jack4909

Posted
  • Author
Posted

Went to the dealership in Settler what a difference they actually seem to want to fix the truck. In the troubleshooting they found that the body control module was not communicating with the transmission which was activating the traction control this showed up as a code in the transmission. The connection is under the sill plate on the drive door. They also found the loud ticking noise which camrose said was injector noise to be the vacuum pump. Truck has been running great since. Five and half months half a dozen trips to camrose one hour each way and they kept telling us there is nothing wrong with the truck. The people in the service department in Settler were great.

Jack4909 Enthusiast

Jack4909

Posted
  • Author
Posted

No they didn't say all they said is that the transmission and body control module would loose communication with one another. They said that when the looked this issue up on GM's diagnostic sight that this was not the first truck to have this issue. They read a bulliten about the connection under the sill plate on the driver's side.

  • 4 weeks later...
Jack4909 Enthusiast

Jack4909

Posted
  • Author
Posted

Finally the problem has been fixed if you're engine has a lifter noise that seems to loud do let them tell you that's just the fuel injection. One of the lifters for the active fuel management system was sticking on number 7 cylinder and finally stuck completely bending the pushrod. The dealership changed out lifters and pushrod truck runs perfect again completely quite no injector noise.

Archived

This topic is now archived and is closed to further replies.

Go to topic listing

  • Recently Browsing   0 members

    • No registered users viewing this page.

  • Forum Statistics

    250.4k
    Total Topics
    2.7m
    Total Posts

  • Member Statistics

    342,791
    Total Members
    8,960
    Most Online
    d.lowrey
    Newest Member
    d.lowrey
    Joined

  • Who's Online   0 Members, 0 Anonymous, 5,172 Guests (See full list)

    • There are no registered users currently online

  • Latest Articles

  • Posts

    • Grumpy Bear
      J&L OIL SEPARATOR CO

      By Grumpy Bear · Posted

      Just did an injector/HPFP replacement on Pepper at 192,400 miles; close enough to 200K, RIGHT? (If 200K is considered life end and to me it isn't). But hey, to each his own.    Have never run a catch can on this vehicle. Back side of every valve looked like a new valve spray painted semigloss black. Port walls looked 'neat' (all a normal result of passive EGR via VVT) Zero build up even in AFM cylinders. Just color. It uses no measurable oil and never has.    At 155,000 I put her on E-85 and a borescope of the cylinders at plug change showed very clean pistons and valve faces. The replaced injector tips looked new. (It was the pump piston seal that was leaking). Oh well, have six good backups.    Still gets 28 mpg on gas (highway average) and over 20 (highway) on alky. UOA's look good and runs as good now as it did when I bought it. Better in fact.    What improvement would a Catch Can provide this motor?     And given all this I expect that IF I installed one I'd see some water/gas/oil vapor accumulation. Byproducts of normal combustion.   Having said that, IF my motor used an appreciable amount of oil I'd consider it a useful 'crutch' until I had the situation corrected OR if bore polished, until I junked it or rebuilt it to stave off repeated plug fouling.    I'm not telling you what I THINK. But what its DONE.          
    • Grumpy Bear
      Starting a new thread regarding mounting my 2014 OEM wheels to my 2026

      By Grumpy Bear · Posted

      Love the look. I'm a SCSB lover myself.    Two items. 1.) A spacer changes scrub radius but this also changes when we use wheels of different offsets. A little isn't a big deal. 2.) Steel wheels, alloy wheels all have different thickness. Same effect on the stud and lug nut as a spacer. When hub centric the wheel isn't supported by the stud. It's supported by the hub. The stud just keeps it all together.  
    • JAI3
      2016 Sierra 5.3L L83 new injectors now runs rich.

      By JAI3 · Posted

      I had a evap sol go bad a couple weeks ago. . I replaced it.  While watching live data at the time I saw I had some cylinder 1 misfires. No MIL but on live data I could see ~50 at startup and about 70 more after an hour a drive all on cyl 1.  I also noticed that the LTFT were -5% to -15% always.  And that bank 2 is always -3% richer than bank 1. Even across all driving modes, city, highway, etc it’s always 3% richer than bank 1. So I start with the misfire. Swapped coil, plug, and plug wires from 1 to 3. No follow. I got an Injector reseal kit, pulled the D/s injector rail, swapped #1 and #3 injectors, resealed them, reinstalled and retested.  The misfire followed to 3. So I ordered and replaced all 8 injectors, spark plugs, and plug wires. Also replaced the 1 time use fuel pipes under the intake manifold.  Injectors that were in the truck since new were  Part # 12668390.  I replaced them with # 12742701 Got from RockAuto. Pretty certain they’re genuine and the correct ones. I called a friend at a parts store who told me “the 12742701 were the correct superseded part # for the originals I was replacing”. So started truck after replacing all that and it’s running -15 - -30 LTFTs. I reset the fuel trims with GDS2 and drove it for a 60 miles trip each way. There have been no changes in the LTFTs.  I checked if the HPFP was leaking into the crankcase. I removed the pvc and watched the trims. No difference.  I checked the alcohol content and it was at 10%  I’m out of ideas here. Truck seems to run great. Just always rich on the fuel trims.  Anyone with any help or ideas would be greatly appreciated.  I ran an injector balance test just for the heck of it and it came back this. I’m confused.  I have gds2 and some other diag tools if anyone knows of anything I should test next.
    • Coastie05
      Will not stay in Reverse

      By Coastie05 · Posted

      Definitely needs to go back to the dealer. 
    • Grumpy Bear
      Wow I'm in a pickle. (Broke down truck) and a story.

      By Grumpy Bear · Posted

      No, but don't skimp on safe! 😉 

  • GM-Trucks.com Clubs

  • Popular Contributors

×
×
  • Create New...