Question about 2002 GMC Yukon Denali
Key switch was left on, the battery went dead. After charging battery the truck now idles rough when started. If you don't touch gas it idles rough and goes dead after letting up on accelerator. When driving truck it goes dead if you let off the gas. We have removed the negative battery terminal in an attempt to reset system, no change.
If the bat went dead and was disconnected it can take 25 to 50 miles of driving for computer to reset sensors and controls. Sounds like MAF Sensor maybe reading different than when it was first driven. Did you drastically change climates or altitudes, New readings from when it originally was put into service. Slight changes in temp, alt and other variables gradually reset, if driving does not improve within 50 miles it will need diagnostics.
Posted on Jan 06, 2009
Based on my own experience, I would guess your fuel pump is dying, which these older Denali's are notorious for. I just had to replace mine, and it's not easy or cheap. Also check the air filter...if it's really dirty/clogged it can effect idle, power, etc.
Posted on Apr 06, 2015
a 6ya expert can help you resolve that issue over the phone in a minute or two.
best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
Posted on Jan 02, 2017
Tips for a great answer:
Dec 27, 2016 | 2002 Chevrolet Venture Passanger
Jul 24, 2015 | 2007 Toyota RAV4
Feb 15, 2014 | BMW Cars & Trucks
Jun 12, 2013 | Cars & Trucks
Sep 24, 2012 | 1989 Ford Probe
May 23, 2011 | 2005 Mazda RX-8
Nov 06, 2010 | 1999 Buick LeSabre
Dec 31, 2008 | 2002 Toyota Tundra
Oct 23, 2008 | 1991 Dodge Power Ram 50
407 people viewed this question
Usually answered in minutes!