Question about 1999 GMC Yukon Denali
Problem for several years, multiple dealers, still no luck.
We thought we had it when we replaced the MAP sensor in Jan 08, but doing it again. I still think it has something to do with the lower air pressure when it rains. The problem has NEVER occured by washing the truck, and one shop dowsed it in water repeatedly to try to get it to induce problem. It only does this when it rains. No code is ever indicated during or after the problem.
Vehicle will turn over a couple revs when key is reset (and fuel pump recycles). It turns over a few revs then quits. If you do not reset the key, and try to push the key to start from the ON position, it does not catch any revs (no fuel, because no reset) thereafter.
Crank sensor, dist have also been replaced with various tries by dealers, they did nothing, no difference. MAP sensor replace seemed to solve the problem for a couple rains, until now (Live in AZ.)
One of my problems was with a 99 Yukon SLE and it wouldn't start when the air temp was below freezing. It would crank, but for whatever reason the fuel pump would disengage, I used to have to prime the throttle body with gas to keep it running and as soon as the engine got warm, voila! I know it doesn't sound like the same issue, but hear me out. I bought the SUV secondhand. It had an aftermarket security system installed, and according to the dealer who fixed the problem, the original installer tapped into the main wiring harness and made a mess. After replacing the wiring harness, this and a other problems miraculously disappeared. If you have anything tapping into your main wiring harness you may be getting moistur and causing a short. Hope this helps, and if not ... sorry for wasting your time.
Posted on Apr 20, 2009
When the dist. was replaced, did that include the cap, rotor and ignition module? what about fuel filter? coil?
Posted on Nov 28, 2008
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:
Feb 23, 2014 | 2004 GMC Yukon
Sep 06, 2012 | 1999 Mercury Sable
Oct 06, 2010 | 2003 GMC Yukon Denali
Jun 08, 2010 | Volkswagen Jetta Cars & Trucks
May 09, 2009 | 2007 GMC Yukon
Feb 05, 2009 | 1999 GMC Yukon Denali
Dec 27, 2008 | 1999 Pontiac Grand Prix
Nov 11, 2008 | 2003 GMC Yukon XL
Aug 22, 2008 | 2003 Nissan Frontier Crew Cab
1,124 people viewed this question
Usually answered in minutes!
Step 2: Please assign your manual to a product: