2004 Chevrolet Impala LSFACTORY OEM SERVICE PROCEDURE

HVAC Control Module Replacement

WARNING: This page is about a different car, the 2008 Buick Lucerne. However, it is still accessible from the selected car via links, so may be relevant.
Fig 1: View Of HVAC Control Module
GM1683159Courtesy of GENERAL MOTORS CORP.
Callout Component Name
NOTE: Refer to Fastener Notice .
Fastener Tightening Specifications:  Refer to Fastener Tightening Specifications .Preliminary Procedure: Remove the instrument panel center trim panel. Refer to Instrument Panel Center Trim Panel Replacement .
1 Heating and Air Conditioning Control Assembly Screw (Qty: 3)

Tighten:  1.0 N.m (9 lb in)
2 Heating and Air Conditioning Control Assembly
Tip:  Disconnect the heating and air conditioning control assembly electrical connectors.
Refer to Control Module References for programming and setup information.
Factory Service Tools

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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.

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