K 3500 Truck 4WD V8-6.6L DSL Turbo VIN 1 (2001)
Air Door Actuator / Motor: Customer Interest
Heating, A/C - Passenger Side of Vehicle Colder/Warmer
File In Section: 01 - HVAC
Bulletin No.: 01-01-37-008
Date: April, 2001
TECHNICAL
Subject:
Passenger Side of Vehicle Colder/Warmer Than Driver's Side
(Repair HVAC Case to Cowl Seal)
Models:
1999-2001 Chevrolet and GMC C/K Pickup (Silverado, Sierra) and Utility (Suburban, Tahoe, Yukon, Yukon XL) Models
2002 Cadillac Escalade
Condition
Some customers may comment that the passenger side of the vehicle may be:
1.
Colder than the driver's side when the heat mode is on.
2.
Warmer than the driver's side when the air conditioning (A/C) mode is on.
3.
There may be dampness on the vehicle dash assembly when the A/C mode is on.
Cause
Condition may be due to poor sealing of the HVAC air inlet case to the front of dash or the recirculation mode door actuator may not hold the
recirculation door closed while driving.
Correction
Replace the recirculation door actuator (if necessary) and repair the HVAC case to cowl seal using the following procedures:
1.
Place the A/C control in the manual heat mode.
2.
Remove the fixed mast radio antenna.
3.
Open the hood and install fender covers.
4.
Remove both wiper arm assemblies using the following procedure:
4.1.
Disconnect the washer solvent hose from the air inlet grille panel nozzle.
4.2.
Remove the cover from the wiper arm retainer. Remove the retainer.
Important:
Use a battery terminal puller in order to remove the wiper arm.
Rock the wiper arm back and forth in order to loosen the arm from the drive shaft. Remove the wiper arm.
5.
Lower the hood.
6.
Remove the air inlet grille panel using the following procedure:
6.1.
On each end of the air inlet grille panel is a rubber flap for the hood hinge cutout. Lift this flap and remove the air inlet grille panel attaching
screw.
6.2.
Remove the air inlet grille panel center top push pin.
6.3.
Remove the clips that position the forward edge of the grille panel to the top of the cowl.
