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 MANUALSPONTIAC1991FIREBIRD FORMULA, 5.0 F, STANDARD, M39REPAIR AND DIAGNOSIS (SINGLE PAGE)HEATING, VENTILATION & A/C (HVAC)HVAC CONTROL SYSTEMSHEATER SYSTEMHEATER CONTROL PANEL ASSEMBLY R & I ("J" BODY)
1991 Pontiac Firebird Formula, 5.0 F, Standard, M39
Heater Control Panel Assembly R & I ("J" Body)
1991 Pontiac Firebird Formula, 5.0 F, Standard, M39SECTION Heater Control Panel Assembly R & I ("J" Body)
Disconnect battery negative cable. Remove heater control panel trim plate and attaching screws. Pull heater control out. Disconnect electrical connections and cables from heater control. See Fig 1 . To install, reverse removal procedure.
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.