Changed the key lock switch and now it starts for two seconds and shust back off.
Sounds like you need tom relearn the security pass lock system. There are plenty of videos on you tube that will show you how to do this.
Essentially you will turn the key on, do not start, and leave it on until the security light stops flashing. then turn the key off and then it turn it back on, do not start. repeat for a total of three times then turn off and start the vehicle. Should take about 30 minutes. side note, it will not hurt to have a battery charger hooked up while you do this to make sure the battery does not go dead...
I’m happy to assist further over the phone at https://www.6ya.com/expert/jeremy_d728a59f986299fa
SOURCE: 2005 gmc yukon xl denali service ride control
it has to do with your air ride suspension best bet is take it to the dealer there is probably a problem with a level sensor. hope this helps you
SOURCE: 2005 gmc yukon back passenger doors will not
My wife's 2003 Yukon wouldn't lock the rear doors or hatch, but it would unlock. My problem was the lock relay was bad. There are two relays, one for lock and one for unlock. They are located in the fuse panel on the left side of the console. Open the drivers door and you will see a cover that pops off. Behind this are several fuses and relays. Consult your manual to see which is the lock and unlock relays. They are side by side on a 2003. They pull straight out. I replaced both and they were around $10 apiece at any auto store.
SOURCE: rear doors and tailgate will not lock with remote
Harris, did you find a solution to your problem? I am having the same issue on my 04 denali. Rear doors and tailgate wont lock but the unlock fine. Front door function normally? let me know.
SOURCE: 2001 gmc yukon xl key in ignition won't turn to
The tumblers in the ignition lock may be seized, try cleaning it out first with a small spray of WD40 and try the spare ignition keys. The keys it self may be too worn down for the tumblers in the lock and if you have lots of other keys on your key chains, this will promote the lock to wear out quicker. Good luck and hope this helps and try turning the steering where back and forth as you try to turn the ignition key.
SOURCE: I have a 2005 GMC Yukon XL. The service 4WD is on.
Yes you do have to take it to the dealer, This is a common problem in these trucks. This is caused by a bad encoder sensor in the shifter on the side of the transfer case. The sensor can be replaced with out having to replace the shifter assembly.
THe best test is to get the code from the system. This sensor is a sliding resistor and the material wears off causing a false reading. That is why the lights were showing Nothing, but you were able to drive. The code for the sensor is C0327.
TBS: #PIP3480M: Rattle Drone Or Buffeting Noise At Highway Speed In 2WD Or DTC C0327 - keywords 246 2hi 2high 4WD auto awd buffet buzz case click indicator knock lamp light service tick transfercase transfer vibrati - (Mar 4, 2008) Vehicles involved were built approximately between 01/01/04 and 03/06/06. The noise condition if not noticed by the customer may cause eventual encoder sensor wear causing DTC C0327 set in the Transfer Case Control Module (TCCM).
An updated TCCM calibration has been released to apply light pressure to the transfer case clutch pack and reduce the rattle. The calibration was released on 3/18/07 and the title line will read "to correct transfer case rattle at highway speeds and possible DTC C0327". For Rattle only (no current DTC C0327 set), Install the updated calibration and if necessary follow the diagnostics listed below
If the vehicle has a current or history dtc C0327 and can be diagnosed to the encoder sensor, re-flash with the updated calibrations and replace the encoder sensor as necessary.
Important Note: All NV246 transfer cases built 02/25/06 and beyond are manufactured with pressed fit parts to help reduce the rattle. Inspect the ID tag on the transfer case for this build date and verify the tccm has the latest calibration before repairs are initiated.
Thank you fur using Fixya and good luck.
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