Backup Lamps
The backup lamp request signal is sent from the PCM to the BCM on the GMLAN serial data system. This signal is based on the park neutral position (PNP) switch signal. The BCM supplies voltage to the backup relay and to the automatic day/night mirror when the vehicle is in reverse. The backup relay supplies a voltage on the backup lamp supply voltage circuit to the backup lamps and trailer backup circuit.
Maybe the back up lamps relay is stuck closed sending battery voltage to the lights all the time . The factory repair manual said this back up lamp relay is in the under hood fuse / relay box. It also states the relay is a PCB - printed circuit board relay , soldered directly on the circuit board inside the fuse / relay center .
SOURCE: 2007 GMC YUKON denali, rear brakes have an air
Here's a link to a thorough article on the subject which should help you...
http://www.aa1car.com/library/abs_bleeding.htm
SOURCE: Replace headlamps 2007 GMC Yukon
It should be pretty easy, thats why there no "directions" Lift up the hood, now at the headlights there should be 2 rods, lift these rods and the lights should lift out, to access the bulbs.
SOURCE: Heated seats won't stay on in 2004 GMC Yukon Denali
See GM TSB 05-08-143-001, If you have Adjustable pedals, especially if they don't work with the memeory buttons, but function with thier own buttons. Its the Brake Pedal Position Sensor is shorted and mesing up the seat module which controls the heaters too. My 05 Suburban had the same issue
SOURCE: my 2007 yukon's reverse lights
Switch on transmission is jammed, order a new one but disconnect it for now.
SOURCE: 2007 GMC YUKON. Keyless Entry problem. The remote ...
Disconnect the battery to the car for five mins. Thay should reset the keyless module. I had the same problem
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