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Diagnostic Procedure

WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2002 GMC Sierra, 2002 GMC Cab & Chassis Sierra, 2002 GMC C3500 HD, 2002 Chevrolet Silverado, and 2002 Chevrolet Cab & Chassis Silverado. 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. Turn ignition off. If air bags have not deployed, go to next step. If air bags have deployed, go to step  5.
  3. Inspect vehicle and undercarriage for signs of impact. If no impact has occurred, go to next step. If impact has occurred, go to step  5.
  4. Replace SDM. See SENSING & DIAGNOSTIC MODULE (SDM)  under REMOVAL & INSTALLATION. Go to step  6.
  5. Replace components and perform inspections as required following an accident. See POST-COLLISION INSPECTION . Go to next step.
  6. Reconnect all SIR components. Go to SIR DIAGNOSTIC SYSTEM CHECK . 57
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