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Diagnostic Procedure

WARNING: This page is about a different car, the 2002 Oldsmobile Bravada, 2002 GMC Envoy XL, 2002 GMC Envoy, and 2002 Chevrolet TrailBlazer. However, it is still accessible from the selected car via links, so may be relevant.
  1. 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 .
  2. Using scan tool, verify that PCM is programmed with correct VIN. If VIN is not correct, go to next step. If VIN is correct, go to step  4.
  3. Using scan tool, program correct VIN into PCM. Go to step  9.
  4. If BCM was replaced, go to next step. If BCM was not replaced, go to step  6.
  5. Using scan tool, program BCM using scan tool prompts. Go to step  9.
  6. Using scan tool, verify that BCM is programmed with correct VIN. If VIN is not correct, go to next step. If VIN is correct, go to step  8.
  7. Using scan tool, program correct VIN into BCM. Go to step  9.
  8. Turn ignition off. Replace SDM. See SENSING & DIAGNOSTIC MODULE (SDM)  under REMOVAL & INSTALLATION. Go to next step.
  9. Reconnect all SIR components. Using scan tool, clear DTC's. Road test vehicle. Turn ignition off for 10 seconds. Go to SIR DIAGNOSTIC SYSTEM CHECK .
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