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HOMESERVICE MANUALSCHEVROLET2008CHEVY EXPRESS G3500, VAN PASSENGER EXTENDEDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 745 (HVAC SYSTEM - MANUAL)REPAIR INSTRUCTIONSHVAC CONTROL MODULE REPLACEMENT
2008 Chevrolet Chevy Express G3500, Van Passenger Extended

HVAC Control Module Replacement

2008 Chevrolet Chevy Express G3500, Van Passenger ExtendedSECTION HVAC Control Module Replacement
WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2011 GMC Yukon XL, 2011 GMC Yukon, 2011 Chevrolet Tahoe, 2011 Chevrolet Suburban, and 2011 Chevrolet Avalanche. However, it is still accessible from the selected car via links, so may be relevant.
Fig 1: HVAC Control Module
GM1682696Courtesy of GENERAL MOTORS CORP.
HVAC Control Module Replacement

Callout Component Name

Preliminary Procedure

  1. Remove the instrument panel accessory trim plate. Refer to Instrument Panel Accessory Trim Plate Replacement (Except Cadillac) , Instrument Panel Accessory Trim Plate Replacement (Cadillac) .
  2. Remove the accessory switch assembly. Refer to Accessory Switch Replacement (Cadillac) , Accessory Switch Replacement (Except Cadillac) .
  3. Disconnect the electrical connectors.
1 Heater and Air Conditioning Control Assembly Screw (Qty: 2)
CAUTION:

Refer to Fastener Caution .


Tighten 
1.5 N.m (13 lb in)
2 Heater and Air Conditioning Control Assembly
TIP:  HVAC Control Module must be reprogrammed. Refer to Control Module References .
RENDER: 1.0x

NO RELATED

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.