GM Truck Club
THE PREMIER CHEVY TRUCK & SUV FORUM
Founded in 2004 ~ We're the #1 Chevy Truck & SUV Forum.
Silverado & Sierra | Tahoe & Yukon | Suburban & Yukon XL | SUV & CROSSOVER
Results 1 to 2 of 2
  1. #1

    Default 2009 Tahoe - Mystery Problems

    Howdy ya'll.
    Recently purchased a used 09 Tahoe with remaining factory warranty a week ago. Now noticing some things that's got me worried!


    • push gas pedal to accelerate and there's hesitation for a second or two, then it goes
    • when decelerating from 60 mph, there's a whining noise, it's present when decelerating from 45-60 mph
    • when coasting on the highway tonight (no gas or break), then giving light gas, growling noise can be heard

    dealer is aware of a rough idle but states "can't do anything about the rough idle unless it throws a code"

    help?

  2. #2
    Sr. Engineer
    Join Date
    May 2009
    Location
    Manitowoc, WI
    Posts
    400

    Default

    The hesitation is that way in all the new trucks.. its "torque management" in the computer meant to put less strain on the transmission. You can change it if you get a custom tune on your truck or buy tuning software like hptuners.

    The growling noise when giving it light gas is probably the truck running on only 4 cylinders for the active fuel management. You should be able to push a button on the driver's information center that shows when its running on 8 or 4 cylinders to verify this.

    Not sure on the whining noise. Is it in auto 4wd when its doing that?

Similar Threads

  1. 2009 6 speed problems
    By wadman in forum GM Powertrain
    Replies: 2
    Last Post: 11-30-2009, 06:33 PM
  2. CRACK DVD/NAV 2009 Tahoe
    By bowtie8 in forum Audio, Video & Gadget Tech
    Replies: 4
    Last Post: 06-17-2009, 04:30 PM
  3. 2009 chevrolet tahoe z71
    By raisor87 in forum Chevy Tahoe Forum (GMC Yukon, Cadillac Escalade)
    Replies: 6
    Last Post: 03-03-2009, 08:37 AM
  4. tahoe problems, need help quick!!!!!!
    By mmad16 in forum Lifted & Offroad Suspension
    Replies: 1
    Last Post: 08-15-2008, 11:01 PM
  5. 1999 Tahoe ABS Problems?
    By cbarnum in forum Chevy Tahoe Forum (GMC Yukon, Cadillac Escalade)
    Replies: 0
    Last Post: 06-20-2006, 10:35 AM

Tags for this Thread

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •