GM Service Manual Online
For 1990-2009 cars only
Makes
🢒
GMC_Truck
🢒
2001
🢒
Yukon XL - 4WD
🢒
HVAC
🢒
HVAC Systems - Manual
🢒 Defrosting Insufficient
Problem
Action
The defroster nozzle is obstructed.
•
Inspect the defroster nozzle.
•
Remove any foreign objects.
•
Repair any loose instrument panel pad that blocks an outlet.
The defroster air valve actuator is faulty.
•
Inspect the defroster air valve operation.
•
Replace any faulty actuator valve as necessary.