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.
1997 Pontiac Firebird Formula, 2D Convertible, AutomaticFACTORY OEM SERVICE PROCEDURE
Body Control Module
- Description & Operation
- Self-Diagnostic System
- Diagnosis & Repair
- Notes
- DTC 12, Begin Diagnostic Display
- DTC 21/31, Courtesy Lights Feed (Circuit Shorted To Ground)
- DTC 22/32, Courtesy Lights Return (Circuit Shorted To Battery)
- DTC 23/33, Retained Accessory Power (Circuit Shorted To Ground Or Battery)
- DTC 24/34, Fasten Seat Belt Indicator (Circuit Shorted To Ground Or Battery)
- DTC 25/35, Security Led Present (With Theft Deterrent Only)
- DTC 41, Last Transmitter Message Received Valid
- DTC 42, Last Transmitter Message Received Had Invalid Id
- DTC 43, Last Transmitter Message Received Had SUMCHECK Error
- DTC 44, Last Transmitter Message Received Had Encryption Error
- DTC 45, Receiver Processing Currently In 20-Second Lockout
- DTC 55, Begin Configuration Display
- Removal & Installation
- Wiring Diagram
Factory Service Tools
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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.
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