2004 GMC Yukon Denali Repair and Maintenance
A guide to problems, costs, maintenance and repair for your 2004 GMC Yukon Denali
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2004 GMC Yukon Denali ProblemsFront/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.
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.
2004 GMC Yukon Denali QuestionsHeater 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
Turn it all the way up on high and 90 and I feel heat coming through the vents but no blowing at all
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...