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Home >> Chevrolet >> 2006 >> Silverado 1500 HD, 4WD >> Repair and Diagnosis >> External Pages >> Different car >> Section 1141 (Immobilizer System) >> Diagnostic Information and Procedures >> DTC P1631 (with RPO Y41) >> Reference Information

Reference Information

WARNING: This page is about a different car, the 2008 Cadillac CTS. However, it is still accessible from the selected car via links, so may be relevant.

Schematic Reference 

Immobilizer Schematics 

Connector End View Reference 

Component Connector End Views

Description and Operation 

Immobilizer Description and Operation (without RPO Y41)  or Immobilizer Description and Operation (with RPO Y41) 

Electrical Information Reference 

Scan Tool Reference 

Control Module References for Scan Tool Information