WARNING: This page is about a different car, the 2002 Pontiac Firebird and 2002 Chevrolet Camaro. However, it is still accessible from the selected car via links, so may be relevant.

Retrieve and display DTCs by entering Body Control Module (BCM) using SECURITY indicator diagnostic mode. See RETRIEVING BODY CONTROL MODULE DIAGNOSTIC TROUBLE CODES . If diagnostic mode is entered and DTCs are retrieved, go to next step. If diagnostic mode cannot be entered, perform TEST C: CANNOT ENTER BODY CONTROL MODULE DIAGNOSTICS under SYSTEM TESTS.
If both DTCs 12 and 55 are retrieved, go to next step. If DTCs 12 and 55 are not retrieved, perform TEST C: CANNOT ENTER BODY CONTROL MODULE DIAGNOSTICS under SYSTEM TESTS.
If either DTC 25 or 35 are retrieved, go to next step. If both DTCs 25 and 35 are retrieved, go to step 5.
If DTC 35 is retrieved with DTC 25, go to next step. If DTC 35 is retrieved without DTC 25, see appropriate ANTI-THEFT SYSTEMS article.
If any other DTCs are retrieved other than DTC 12, 25/35 and 55, perform appropriate test in accordance with DTC retrieved. See DIAGNOSTIC TROUBLE CODE DEFINITIONS . If no other DTCs are retrieved other than DTC 12, 25/35 and 55, perform appropriate diagnostic system check for malfunctioning system. See BODY CONTROL SYSTEM DIAGNOSTIC SYSTEM CHECK .

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.

Safety Warning

Body Control Module System Diagnostic System Check

Use the Manual With the Right Hardware

When to See a Mechanic

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