GM Truck Club
Founded in 2004 ~ We're the #1 Chevy Truck & SUV Forum.
Silverado & Sierra | Tahoe & Yukon | Suburban & Yukon XL | SUV & CROSSOVER
Results 1 to 3 of 3
  1. #1

    Default 95 Tahoe, high idle, trans starts out in 3rd gear.

    I am in a quandry. My 95 Tahoe has been parked for about 90 days. Prior to that it ran and drove like a new truck. Now it starts right up, but idles in park at 1200-1300 rpm. in gear it is right at 1000 rpm. The idle is a bit on the rough side. It is silky smooth at cruise speed.
    I see the "check engine" light is on, but I can't get a code.
    The biggest problem is that when the gear selector is in "D" the trans starts out in 3rd gear. If I manually drop it all the way to low it starts out in 2nd. Prior to retiring the truck I did a trans service with synthetic fluids and an oil change along with a complete tuneup. I did drive the truck for a couple of days after the service and all worked great.
    Any ideas out there?

  2. #2
    Sr. Engineer
    Join Date
    Aug 2009
    Virginia Beach, VA.


    I would look in the area of the TPS (Throttle Position Sensor) or the IAC (Idle Air Control)....

    But the TPS would be my first look I think.

  3. #3


    Is a TPS signal relative to the transmission?

Similar Threads

  1. high idle/ high engine compartment heat
    By lynx in forum General Chevy & GM Tech Questions
    Replies: 3
    Last: 09-05-2010, 03:03 PM
  2. Low idle speed when in gear?
    By artlock in forum Performance & Fuel
    Replies: 7
    Last: 07-29-2010, 10:34 AM
  3. 1999 Tahoe high idle
    By ffcmckinney in forum GM Powertrain
    Replies: 5
    Last: 03-30-2010, 01:15 PM
  4. high idle
    By jeroen in forum General Chevy & GM Tech Questions
    Replies: 3
    Last: 02-07-2010, 04:06 AM
  5. sporatic idle while in gear and cold...
    By Cros89 in forum Chevy Silverado Forum (GMC Sierra)
    Replies: 16
    Last: 02-20-2009, 09:12 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