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 ProblemsCheck Engine Light Due to Gas Cap Issue
A Loose or worn gas cap may cause Check Engine Light to illuminate.
The speedometer or other instrument panel gauge may begin to work erratically at times. Our technicians tell us that the instrument cluster must be sent to a repair facility to correct this fault. The warranty has been extended on some of these units to 7 years or 70,000 miles.
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...