Safety Warning

DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.

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HOMESERVICE MANUALSCHEVROLET1999PICKUP C2500, 2D PICKUP, 6.5 F, STANDARDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 671 (HEATING, VENTILATION AND AIR CONDITIONING)REPAIR INSTRUCTIONSRECIRCULATION DOOR REPLACEMENTINSTALLATION PROCEDURE

1999 Chevrolet Pickup C2500, 2D Pickup, 6.5 F, Standard

Installation Procedure

1999 Chevrolet Pickup C2500, 2D Pickup, 6.5 F, StandardSECTION Installation Procedure

WARNING: This page is about a different car, the 2003 Pontiac Grand Prix. However, it is still accessible from the selected car via links, so may be relevant.

Install the recirculation door (1) into the recirculation housing (2).

Fig 1: Installing Recirculation Door
Courtesy of GENERAL MOTORS CORP.
Align the retaining tabs and install the recirculation housing (2) to the HVAC module.
NOTE: Refer to FASTENER NOTICE .
Install the recirculation housing screws.
Tighten

Tighten the screws to 1.5 N.m (13 lb in).

Fig 2: Installing Recirculation Housing Screws
Courtesy of GENERAL MOTORS CORP.
Connect the recirculation actuator plunger rod to the recirculation actuator lever.
Position the recirculation actuator on to the mounting slides of the HVAC module assembly.
Ensure that the lock tab locks the recirculation actuator in place.
Important: inspect for binding at the recirculation actuator lever.
Connect the vacuum line to the recirculation actuator.
Install the HVAC module. Refer to HVAC Module Assembly Replacement .

Fig 3: Connecting Recirculation Actuator Plunger Rod To Recirculation Actuator Lever
Courtesy of GENERAL MOTORS CORP.

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.