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Home >> GMC >> 2006 >> Sierra 1500 HD, 4WD >> Repair and Diagnosis >> External Pages >> Different car >> Section 977 (Supplemental Inflatable Restraint System) >> Diagnostic Information and Procedures >> DTC B1001 (SDM) >> Circuit/System Testing

Circuit/System Testing

WARNING: This page is about a different car, the 2008 GMC Sierra, 2008 GMC Cab & Chassis Sierra, 2008 Chevrolet Silverado, and 2008 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
IMPORTANT: When removing connectors inspect for damage or corrosion. Damage or corrosion in the following requires repair or replacement of the affected.
  • SDM
  • SDM wiring harness
  1. Ignition ON, verify the scan tool Secondary Key Status displays Valid.
    • If not the specified value, verify the scan tool Received VIN Digits 2-7 match the vehicle VIN, if the VIN does not match, reprogram the BCM. If the VIN matches, reprogram the SDM.
  2. Ignition ON, verify the scan tool Primary Key Status displays Valid.
    • If not the specified value, verify the scan tool SDM Primary Key matches the Received Primary Key, if the key does not match, perform the Setup SDM Primary Key in BCM procedure.
  3. With a scan tool, verify DTC B1001 is not set as current.
    • If DTC is set as current, replace the SDM.
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