20 Most Recent 2007 GMC Yukon XL Denali - Page 2 Questions & Answers

Code not revel ant to this vehicle!

You have to remove the dash board and the heater box to get to it. On a scale of 1-10 I would give it an 8.5

My son is a master technician. He said it sounds more like the heater core to him. Does it have any smell to it, like antifreeze. I would definitely get a second opinion.

Sounds like a sensor is not working properly. Check to see if there are any obstructions in the way or excessive dirt around the latch or contacts

I get this same symptom when my phone is connected via Bluetooth and I receive a text message. Do you happen to have your phone connected via Bluetooth?

Well if you make sure the drain is open and working that is about all you can do except to take the vehicle to someone that can chemically clean the HVAC box and evaporator for you. I have also seen kits that you can purchase at one of the bigger autoparts chain stores.

check your fuel pump for proper pressure and even though your warranty is out they are still responsible to fis it because it happepned while under warranty

ok so whats actually happening with the car..

About the only thing I would be able to think of is a light staying on that you don't normally see.. Like the light in the glove box.. or perhaps you have a light that comes on under the hood when you open it, and it's not shutting off when you close the hood. Here's a far-out idea... Has your horn ever refused to quit honking.... and you unhooked the wires coming to the horns?? If so, that is your problem. That's because with a stuck horn, your horn relay is still operating even after you've unhooked the horns. Just thought I'd throw that out there.