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Home >> Chevrolet >> 2021 >> Trailblazer L >> Repair and Diagnosis >> Body & Frame >> Ignition Switch/Steering Lock >> Immobilizer System >> Diagnostic Information and Procedures >> DTC P1649 >> Reference Information

Reference Information

Schematic Reference

Immobilizer Wiring Schematics 

Connector End View Reference

Master Electrical Component List , or Component Connector End Views - Index

Description and Operation

Immobilizer Description and Operation (without BTM) , or Immobilizer Description and Operation (with BTM) 

Electrical Information Reference

Scan Tool Reference

Control Module References