Jump to content

Engine stalling when decelerating. HELP

GMSEEDENALI

Recommended Posts

GMSEEDENALI New Member

GMSEEDENALI

Posted
Posted

2007 GMC Sierra Denali 6.2l AWD, 115K miles, never had issues until...

 

Last week my truck completely stalled on me after driving it w/no issues for about twenty minutes, but immediately stalled out at the gas station. Truck did the same thing after driving it on an hour long trip when i slowed down to about 20MPH on the freeway and RPM's were at about 1k. Had it towed to the closest shop and they informed me the fuel modulator kit was bad and that ended up costing me $800 out the door. I drove it back home on the freeway and it dies 2 more times getting off of the freeway.

 

There are no codes and the truck runs very well until it stalls out. The problems seems to only occur AFTER the truck has warmed up and I am decelerating, basically around 1k RPM. Took it back to the dealership and they swapped out the fuel pump kit AGAIN, thinking/hoping the last fuel pump kit was bad. That didn't work. They replaced the crankshaft sensor and that didn't change a thing. They also cleaned out the throttle body to no avail. They have also hooked up a fuel pressure meter to see if fuel is being starved prior to stalling out and they told me it drops to about 5 PSI before stalling.

 

Myself and the shop is completely dumbfounded and we're both scratching our heads. I wish the truck wasn't worth anything because I'd junk it and get another one, but it's gotta be fixable right?

 

I would appreciate any and everything you could add to this because I can't afford to dump anything more into it without knowing the issue. Thank you very much for any input!

00Silverado4x4 Senior Enthusiast

00Silverado4x4

Posted
Posted

5 psi? There's the problem. I think you need to find a better dealership to fix your vehicle. If they didn't fix it right the first time, they should have warrantied their work. Obviously they are clueless wonders and you're footing the bill. I'd take that situation up their chain of command and get some real solutions.

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

    250.6k
    Total Topics
    2.7m
    Total Posts

  • Member Statistics

    343,007
    Total Members
    8,960
    Most Online
    Brendan C
    Newest Member
    Brendan C
    Joined

  • Who's Online   5 Members, 0 Anonymous, 1,020 Guests (See full list)

  • Latest Articles

  • Posts

    • Grumpy Bear
      The Peckish Synapse

      By Grumpy Bear · Posted

      You can always count on greed to prey on ignorance and stupidity.    Friend bought a 2019 Ford Flex and asked me about using Valvoline R&P 5W30 in it. Told him give the miles on it and the fact it wasn't yet using oil that it was a good plan. He uses a Valvoline quick change shop for his oil service.   First they tell him that isn't the oil the OEM recommends. He told them he didn't care what the OEM thought. Then they floated the, "But it will void your warranty"    His reply was it's a 2019, there is no warranty and informed them their knowledge of the law was lacking.    Then they tell him 'But it will ruin your motor"!.    Mine to ruin he says. Finally they give in and charge him 150% the semi-syn price    Point it the brainwash is so embedded that even the service industry is drunk on their swill. The public is right behind them. Echoing the same lies on every forum and media platform. If the end goal is indeed EV then I'd say that ship is about built. 
    • CamGTP
      Gas Prices

      By CamGTP · Posted

      Diesel hit $6.00 here today at the truck stop.   Payed $2.79 for E85 today too.
    • richard wysong
      Electrical Problem - solved

      By richard wysong · Posted

      Thanks for posting, I'm sure it will help someone
    • Brendan C
      2026 6.6 L5P oil cooler leaking oil at 4,000 miles

      By Brendan C · Posted

      New to diesel trucks. I happened to find my oil cooler leaking oil externally with only 4,000 miles on the truck. I didn’t realize this was an issue until I started researching it. Dealer is going to replace it under warranty but I’m wondering if there’s anything GM is working on to fix this issue. I’ve heard the oil filter used is the same as they use on their V6 motors and that’s what is causing the problems. Should I switch to a bigger filter or keep using the OEM recommended? 
    • Vu1can
      Seems to be Missing a lot of Updates

      By Vu1can · Posted

      So, GMCustomerService:  Judging by the Update History pictured above, is this truck missing any updates that it actually needs. If it's just for the infotainment system, the radio is working fine and no trouble with SeriusXM. and Android Auto is working fine wirelessly with my phone. Some months ago, an update notice was sent to my truck. I approved the update and it finished saying that the update was successful, but it seems that whatever that update was, it didn't actually get installed - at least not if I'm to go by the Update History shown above.   So, again, are there any updates that this truck really should have? I've checked with my dealer but they're reluctant or commit to anything and if I want them to check, they require a $200.00 fee just to check it out and then I'd have to pay for the actual update(s).    Ignorance is bliss, and if none of the updates goes to fixing any mechanical discrepancies, I'll just leave things as is.  

  • GM-Trucks.com Clubs

  • Popular Contributors

×
×
  • Create New...