Installation Procedure

WARNING: This page is about a different car, the 2003 GMC Sierra, 2003 GMC Cab & Chassis Sierra, 2003 Chevrolet Silverado, and 2003 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.

IMPORTANT: The Key should be in the off position when connecting the electrical connectors to ensure proper calibration.

Connect the electrical connectors to the HVAC control assembly.
Install the HVAC control assembly.
Install the accessory switch assembly to the instrument panel. Refer to ACCESSORY SWITCH REPLACEMENT .
NOTE: Refer to FASTENER NOTICE .

Fig 1: Installing HVAC Control Assembly

Courtesy of GENERAL MOTORS CORP.

Install the screws from the HVAC control assembly.
Tighten

Tighten the screws to 1.9 N.m (17 lb in).
Install the instrument panel storage tray.
Install the instrument cluster trim plate bezel. Refer to BEZEL REPLACEMENT -- INSTRUMENT PANEL (I/P) CLUSTER .
IMPORTANT: Do not adjust any controls on the HVAC control module while the HVAC control module is calibrating.

If interrupted improper HVAC performance will result.
Start the vehicle and let run for one minute.