2004 GMC Yukon Denali Repair and Maintenance

A guide to problems, costs, maintenance and repair for your 2004 GMC Yukon Denali

2004 GMC Yukon Denali Problems

Front/Rear Differential May Develop Noise Due to Worn Bearings

The front or rear differential may develop an abnormal noise due to worn bearings or another internal fault. Our technicians tell us that a complete overhaul of the affected differential is commonly necessary to correct this condition.

Turn Signal Switch May Fail and Cause Clicking Noise

A clicking noise may be noted from the turn signal flasher after the turn signals are switched off.  This is commonly cause by a faulty turn signal switch which will require replacement.

"No start" due to anti-theft system failure
The anti-theft system may fail causing a no start condition, the security light may illuminate. Our technicians tell us that the ignition switch may need to be replaced to correct this fault.

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2004 GMC Yukon Denali Questions

Heater not blowing (1 answer)

As of this morning the heater isn't blowing. Yesterday I drove for 20 minutes before it decided to come on. And that was after allowing it to warm up for 10-15 minutes. But today it didn't blow at all. Should I still try to wiggle the wire or does this sound like something else

Why when I turn my heat on it won't blow? (1 answer)

Turn it all the way up on high and 90 and I feel heat coming through the vents but no blowing at all

Why did the check engine light come on in the afternoon and not in the morning? (1 answer)

In the morning, I drove to work with no problems and the check engine light was not on. After an eight hour shift, I started the truck and noticed the check engine light was on. I had it diagnosed at Advanced Auto as a PO442 code. If I change the gas cap and the check engine light is on, where ca...

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2004 GMC Yukon Denali Reviews

Dear Hempsted NY. You and I must have the exact same Denali. Every problem you listed is identical to the problems I am having. I thought for years, my truck was rock solid. My radio blacks out then recovers on its own. My right front tires wear strangely and my brakes were recently changed, pads and rotors now, I don't trust my brakes....waaay too spongy for my liking. I guess thats GMC tel...
my vehicle is in good shape but it have been given me the next list of problems 1 the right front wheel is worn, and i have seen many denali's whit that problem 2 the trany started shifting on his own 3 after the first time i changed the brakes it haven't been the pedal is always spongy the only time it get's hard is when i take it to the car wash after a couple of days it ...
I bought mine used w/about 99,000 miles on it. It has never left me stranded or not started, etc. But i've had it nearly 8mos now and have only put about 5,000 miles on it (i also have a 2008 sebring i bought new, that has 52,000 on it already) i do a lot of driving. This Yukon has been in the shop more than on the road! Some of the denali trim is peeling off on the rear and the front quar...

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