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 K1500, 5.7 RREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 449 (HEATING, VENTILATION AND AIR CONDITIONING)REPAIR INSTRUCTIONSRECIRCULATION DOOR REPLACEMENTINSTALLATION PROCEDURE

1999 Chevrolet Pickup K1500, 5.7 R

Installation Procedure

1999 Chevrolet Pickup K1500, 5.7 RSECTION Installation Procedure

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

Install the recirculation door to the air inlet housing.

Fig 1: Installing Recirculation Door
Courtesy of GENERAL MOTORS CORP.
Align the recirculation door with the other half of the air inlet housing.
Connect the air inlet housing halves.
Install the air inlet housing screws.
Tighten

Tighten the screws to 0.9 N.m (8 lb in).

Fig 2: Installing Air Inlet Housing Screws
Courtesy of GENERAL MOTORS CORP.
Install the air inlet housing to the HVAC module.
Install the air inlet housing screws.
Tighten

Tighten the screws to 0.9 N.m (8 lb in).
Connect the recirculation actuator electrical connector.
Install the HVAC passenger compartment air filters.
Close the HVAC passenger compartment air filter access door.
Install the I/P carrier. Refer to INSTRUMENT PANEL (I/P) CARRIER REPLACEMENT .

Fig 3: Installing Air Inlet Housing Screws
Courtesy of GENERAL MOTORS CORP.

RENDER: 1.0x

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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.