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HOMESERVICE MANUALSCHEVROLET2008CHEVY EXPRESS G2500, VAN CARGO, 6.6 6REPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 1614 (HVAC SYSTEM - AUTOMATIC)REPAIR INSTRUCTIONSMODE VALVE ACTUATOR REPLACEMENT
2008 Chevrolet Chevy Express G2500, Van Cargo, 6.6 6

Mode Valve Actuator Replacement

2008 Chevrolet Chevy Express G2500, Van Cargo, 6.6 6SECTION Mode Valve Actuator Replacement
WARNING: This page is about a different car, the 2009 GMC Sierra, 2009 GMC Cab & Chassis Sierra, 2009 Chevrolet Silverado, and 2009 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
Fig 1: View Of Mode Actuator & Screws
GM1696344Courtesy of GENERAL MOTORS CORP.
Callout Component Name
CAUTION: In order to avoid actuator damage, DO NOT apply power to the actuator when it is not installed in the HVAC module.

Preliminary Procedure

  1. Remove the knee bolster. Refer to Knee Bolster Replacement (With RPO SLT) or Knee Bolster Replacement (Without RPO SLT) .
  2. Remove the air outlet duct - floor LH. Refer to Floor Air Outlet Duct Replacement - Left Side .
  3. Disconnect the electrical connector from the mode actuator.
1 Mode Actuator Screw (Qty: 2)
CAUTION: Refer to Fastener Caution .

Tighten:  1.6 N.m (14 lb in)
2 Mode Actuator
Procedure: 
Re-calibrate the mode actuator. Refer to Actuator Recalibration .
Tip:  Mode actuator cam is now accessible.
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.