Defrosting Insufficient for GMC Truck Jimmy - 2WD 2001

1. Inspect for an obstruction in both of the defroster nozzles.
2. Perform the following steps, as necessary:

•	Remove any foreign objects.

•	Repair any loose instrument panel pad that blocks an outlet.

3. Inspect for the proper operation of the defroster door.
4. Inspect for one of the following conditions.

Replace the defroster actuator or hose if one of the following conditions exist:

•	A faulty defroster vacuum actuator

•	A faulty defroster vacuum hose

5. Inspect for insufficient heating.