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  1. #1

    Default 07 avalanche Reduced power, service traction control and stabilitrak off

    I have a 2007 Chevy avalanche now this issue has occurred numerous times. The check engine light turns on than the displays shows service traction control, stabilitrak off and engine power reduced. This has happened in the drive way even before putting it in reverse. I could shut the truck off for 10 mins and everything goes back to normal except for the check engine light. I know the previous owners had it checked out and had the gas pedal replaced. I've taken it to a shop and all they say is to take it to get the throttle re-learned. Has anyone had this issue and what was the fix? I've read many of these post and I really don't want to be going to the dealer over and over dealing with their B.S. If anybody could help me out I would greatly appreciate it. Thanks

  2. #2



    Oh no! I am sorry to hear that you are experiencing an issue with your vehicle. I might not be able to give you any technical advice but I would be happy to look into this concern for you. Please private message me referencing this thread if I can be of any assistance.

    Jennifer T.
    GM Customer Care

  3. #3


    Hi @dealmanza, I have had the same problem as well; twice in fact, both times last week when it was cold. I have not had a chance to read the codes.

    I am starting to believe this is a common problem with the '07 and up trucks. Some threads that i have read have suggested that the Mass Air Flow sensor is dirty. I don't know, I have not taken the time to look.

    I believe the problem is causing the PCM to go into reduced power mode and because of this mode, things like traction/stability control are being shut off.

    '09 Avalanche LTZ - Black
    '05 Envoy XL (sold)

  4. #4


    Hey folks. Sounds like ya'll are having similar problems to like I just went through. Granted, I'm in a 2010 Sierra with the 5.3L but it sounds like the same problem. I ended up having to have the Throttle body actuator assembly replaced on my truck to fix the issue. Apparently there are two sensors in the module, and one of em stopped working like it was supposed to. After they replaced the assembly, they had to reprogram the computer to accept the new hardware specs. Sadly the years worth of tuning work went out the window. It ended up costing me a little over $655 to repair. Hope this helps point ya in the right direction, I haven't had any issues with my truck since the repair. Good luck!

    2010 GMC Sierra 1500 SLE Extended Cab Z71 4X4 5.3L Flex Fuel
    MagnaFlow single in duel out system
    Volant CAI & Ram Air Scoop with Power Core Filter
    Rhino Tuff Grip Spray in Bed liner
    Undercover Classic Tonneau
    Trail FX Bug "deflector"
    AVS Window Deflectors
    Black Powder Coated Nerf Bars
    RECON L.E.D. Interior, 3rd Cab light, Projector headlights, and Taillights
    ATX Crawl Wheels wrapped in BFGoodrich Rugged Terrain tires
    CalTrend Neoprene seat covers
    2" leveling kit from Max Trac
    Diablo Trinity with Diablew Tune

  5. #5


    I think the answer is in this thread:

    Check the service bulletin on page 3, there is a 10 year extended warranty. Mine is being repaired, at no cost, on Wednesday.

  6. #6


    Hi all I have an 07 Avalanche with engine service light and stabilitrak warning my mechanic today did change the air filter as he said the codes he got was engine running rich and low power to the traction control engine light is off but traction control is still kicking on and of most annoying, anyone have a fix please.

  7. #7


    There are a lot of times when the traction control and stability control kick off; but, it appears that it is usually when the computer detects a problem with the engine.

    Mis-fires, throttle position problems, O2 readings high, or low, etc, will all cause the engine to run at less than peak performance. It appears the first thing to be turned off is the TC and the SC.

    If you could find out what the codes were, we might have some suggestions.

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