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 MANUALSCHEVROLET1988G 30 VAN V8-305 5.0LREPAIR AND DIAGNOSISHEATING AND AIR CONDITIONINGCONTROL ASSEMBLYSERVICE AND REPAIR
1988 Chevrolet G 30 Van V8-305 5.0L
Control Assembly: Service and Repair
1988 Chevrolet G 30 Van V8-305 5.0LSECTION Service and Repair
G SERIES
LESS A/C
1. Disconnect battery ground cable.
2. Remove instrument panel bezel.
3. Remove control assembly mounting screws. Draw control unit rearward, then lower unit from instrument panel. Be careful not to kink control cables during replacement procedure.
4. Disconnect control cables, illumination bulb and blower switch harness lead.
5. Reverse procedure to install.
WITH A/C
1. Disconnect battery ground cable.
2. Remove control knob from headlamp switch, and remove instrument panel bezel.
3. Remove control unit to instrument panel retaining screws.
4. Remove temperature control cable mounting tab screw and eyelet clip.
5. Draw control unit out of instrument panel, first bringing lower right mounting tab through, upper tab next, and lower left tab.
6. Disconnect vacuum lines and harness leads.
7. Reverse procedure to install. Check temperature door operation.
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.