Question about 2005 GMC Yukon Denali
Next time it does it take your fist and hit the top of the console armrest, toward the rear of the armrest, if it stops suspect the Rear Seat Audio module, I'm assuming you have one because I've replaced 3 in the last few months for this exact problem,it sounds like an alt. whine up and down with the engine speed, yes the amp is bolted to the floor under the console, you can pop that RSA module out and let it hang until it makes the noise and then lightly hold it and tap on it to see if the noise goes away. The RSA needs to be programmed to the truck at a dealer.
Hope this helps
Posted on May 08, 2013
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Posted on Jan 02, 2017
SOURCE: Rear heater not working
Possible blend door motor (controls amount of heat that comes out). Or heater core in back is clogged, or air bubble. If your able to locate the two heater hoses that run to the back of the vehicle and check to see if there hot next to the heater core. if both are hot (be careful not to burn yourself) then the flow is good usually. need to pull the panel off and check the blend door motor is working when you turn the rear heater control to cold to hot. let me know what you see
Posted on Apr 07, 2009
Your front pump in the transmission could be going bad. Check the transmission fluid for level and condition. The fluid should be bright red and not burnt (dark in color like burgandy). Best thing to do is take it to a transmission shop and have them check your truck for DTC codes with a Tech 2 scanner and have them do a transmission line pressure test. The whining can also indicate low on transmission fluid and that's bad, you may have burnt some of the clutch packs already and shorten the life of your transmission. Good luck and keep me posted, be glad to help.
Posted on Jun 28, 2009
sound like the head unit's out put mosfet is going bad, but i have also ran in to this problem when it was a speaker wires shorting out. so first check the connection on your rear speakers.
Posted on Oct 15, 2009
Could be the latch mechanism for the door is sticking. You could try using some white grease on the latch and the contact where the latch hooks to. You can purchase the grease from most auto parts stores. You will not need to use alot. Just apply a small amount to the mechanisim and then work it in using the manual handle. Then open and close the door several times to feel the "action". Then apply a little more and repeat. This should loosen the latch and get it working again. Also make sure that none of the tension springs have come loose on the latch. And check the seal around the door and make sure it is not pinched and has a proper fit.
Posted on Dec 29, 2009
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