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HOMESERVICE MANUALSCHEVROLET2008CHEVY EXPRESS G3500, VAN PASSENGER EXTENDEDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 54 (HVAC SYSTEM - AUTOMATIC)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 2007 GMC Yukon XL, 2007 GMC Yukon, 2007 Chevrolet Tahoe, 2007 Chevrolet Suburban, and 2007 Chevrolet Avalanche. However, it is still accessible from the selected car via links, so may be relevant.
Fig 1: View Of HVAC Control Assembly & Screws
GM1682699Courtesy 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 (Cadillac) or Instrument Panel Accessory Trim Plate Replacement (Except Cadillac) .
  2. Remove the accessory switch assembly. Refer to Accessory Switch Replacement (Cadillac) or Accessory Switch Replacement (Except Cadillac) .
  3. Disconnect the electrical connectors.
1 Screw, Control Assembly - Heater and Air Conditioning (Qty: 4)
NOTE: Refer to Fastener Notice .

Tighten:  1.5 N.m (13 lb in)
2 Control Assembly, Heater and Air Conditioning
Tip:  The 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.