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Fig 1: View Of HVAC Control Assembly & Screws

Courtesy of GENERAL MOTORS CORP.

Callout

Component Name

Preliminary Procedure

Remove the instrument panel accessory trim plate. Refer to Instrument Panel Accessory Trim Plate Replacement (Except Cadillac) or Instrument Panel Accessory Trim Plate Replacement (Cadillac) .
Remove the accessory switch assembly. Refer to Accessory Switch Replacement (Except Cadillac) or Accessory Switch Replacement (Cadillac) .
Disconnect the electrical connectors.

Screw, Control Assembly - Heater and Air Conditioning (Qty: 4)

NOTE: Refer to Fastener Notice .

Tighten: 1.5 N.m (13 lb in)

Control Assembly, Heater and Air Conditioning
Tip: The HVAC control module must be reprogrammed. Refer to Control Module References .

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.

Safety Warning

HVAC Control Module Replacement

Use the Manual With the Right Hardware

When to See a Mechanic

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