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 MANUALSPONTIAC1998FIREBIRD V8-5.7L VIN GREPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTCOMPUTERS AND CONTROL SYSTEMSBODY CONTROL MODULETESTING AND INSPECTIONCLEARING DIAGNOSTIC TROUBLE CODES
1998 Pontiac Firebird V8-5.7L VIN G
Clearing Diagnostic Trouble Codes
1998 Pontiac Firebird V8-5.7L VIN GSECTION Clearing Diagnostic Trouble Codes
Current DTCs (21 to 25) remain stored by the body control module (BCM) and are displayed in the diagnostic mode as long as the BCM detects the fault. Once the fault is corrected, the current DTCs are cleared by the BCM. To clear history DTCs (31 to 35) press and hold the door unlock switch for 4 seconds while the BCM is in the diagnostic mode. The BCM will sound three audible warning tones to confirm that the DTCs are cleared.
To clear BCM history DTCs on vehicles without power door locks, backprobe with a fused jumper from BCM connector C1 terminal D to ground for 4 seconds. The BCM will sound three audible warning tones to confirm that the history DTCs have been cleared.
To clear BCM history DTCs on vehicles without power door locks, backprobe with a fused jumper from BCM connector C1 terminal D to ground for 4 seconds. The BCM will sound three audible warning tones to confirm that the history DTCs have been cleared.
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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.