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.
Diagnostic Procedure
2004 Oldsmobile Bravada AWDSECTION Diagnostic Procedure
WARNING: This page is about a different car, the 2003 Chevrolet Corvette. However, it is still accessible from the selected car via links, so may be relevant.
- If SIR diagnostic system check has been performed, go to next step. If SIR diagnostic system check has not been performed, go to SIR DIAGNOSTIC SYSTEM CHECK .
- Install scan tool to Data Link Connector (DLC), located under left side of instrument panel. Turn ignition on. Using scan tool, verify PCM is programed with correct VIN. If VIN is not correct, go to next step. If VIN is correct, go to step 4.
- Using scan tool, reprogram PCM with correct VIN. Go to step 7.
- If BCM was replaced, go to next step. If BCM was not replaced, go to step 6.
- Using scan tool, program BCM with proper Regular Production Option (RPO) configuration. Go to step 7.
- Replace SDM. See SENSING & DIAGNOSTIC MODULE (SDM) under REMOVAL & INSTALLATION. Go to next step.
- Reconnect all SIR components. Ensure all components are properly mounted. Using scan tool, erase DTC's. Road test vehicle. Check for DTC's. If DTC is retrieved, go to step 2. If DTC is not retrieved, system is okay. Go to SIR DIAGNOSTIC SYSTEM CHECK .
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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.