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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 20 (Theft Deterrent System) >> Diagnostic Tests >> DTC P1630: POWERTRAIN CONTROL MODULE UNABLE TO LEARN PASSLOCK(tm) MODULE PASSWORD >> Diagnostic Aids

Diagnostic Aids

WARNING: This page is about a different car, the 2002 GMC Savana, 2002 Chevrolet Chevy Express, 2001 GMC Savana, and 2001 Chevrolet Chevy Express. However, it is still accessible from the selected car via links, so may be relevant.

PCM in learn mode is a DTC for vehicle at assembly plant, dealership and outside garage personnel as an indication that the learn mode is enabled. This means PCM is now ready to learn a new password.

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