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 MANUALSCHEVROLET1999EXPRESS 1/2 TON VAN V6-4.3L VIN WREPAIR AND DIAGNOSISHEATING AND AIR CONDITIONINGCONTROL ASSEMBLYSERVICE AND REPAIRCONTROL ASSEMBLY REPLACEMENT (EXPORT)
1999 Chevrolet Express 1/2 Ton Van V6-4.3L VIN W
Control Assembly Replacement (Export)
1999 Chevrolet Express 1/2 Ton Van V6-4.3L VIN WSECTION Control Assembly Replacement (Export)
REMOVAL PROCEDURE
1. Remove the instrument cluster trim plate.
2. Remove the heater and the A/C control from the instrument panel by the following procedures:
3. Remove the retaining screw (1) from the left edge of the control head (2).
4. Pivot the control head from the instrument panel in order to disengage the tab on the right side of the control head.
5. Pull the control head out of the instrument panel far enough to reach the vacuum and the electrical connectors.
6. Remove the electrical connectors.
7. Remove the vacuum connectors.
INSTALLATION PROCEDURE
1. Install the vacuum connectors.
2. Install the electrical connectors.
3. Install the control head to the instrument panel by the following procedures:
4. Align the tab on the right side of the control head with the slot in the instrument panel.
5. Pivot the control head into the instrument panel.
NOTE: Refer to Fastener Notice in Service Precautions.
6. Install the retaining screw (1) to the left edge of the control head.
Tighten
Tighten the heater and the A/C control head retaining screw to 4 N.m (35 lb in).
7. Install the instrument cluster trim plate.
1. Remove the instrument cluster trim plate.
2. Remove the heater and the A/C control from the instrument panel by the following procedures:
3. Remove the retaining screw (1) from the left edge of the control head (2).
4. Pivot the control head from the instrument panel in order to disengage the tab on the right side of the control head.
5. Pull the control head out of the instrument panel far enough to reach the vacuum and the electrical connectors.
6. Remove the electrical connectors.
7. Remove the vacuum connectors.
INSTALLATION PROCEDURE
1. Install the vacuum connectors.
2. Install the electrical connectors.
3. Install the control head to the instrument panel by the following procedures:
4. Align the tab on the right side of the control head with the slot in the instrument panel.
5. Pivot the control head into the instrument panel.
NOTE: Refer to Fastener Notice in Service Precautions.
6. Install the retaining screw (1) to the left edge of the control head.
Tighten
Tighten the heater and the A/C control head retaining screw to 4 N.m (35 lb in).
7. Install the instrument cluster trim plate.
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.