GM Theft System Repair in Plano, TX
Expert GM theft deterrent diagnostics and repair for Chevy, GMC, Cadillac, and Buick.
GM uses Passlock, Passkey, and PK3/PK3+ theft systems. When they fault, "Service Theft Deterrent System" appears and the vehicle won't start. We diagnose and repair all GM theft issues.
GM Theft Systems
Passlock: resistor-based. Passkey/PK3: transponder-based. PK3+: encrypted communication. Each has different failure modes.
Common Issues
Service Theft Deterrent warning, theft light on, key not recognized, BCM data loss, intermittent no-start, fault after battery disconnect.
Theft System Reset
Clear faults, re-register transponders, BCM key learn, ECM synchronization using manufacturer diagnostics.
BCM Programming
Replacement BCMs need vehicle-specific programming and key registration. Complete service on-site.
What We Offer
Our Services
Frequently Asked Questions
Need Chevrolet Service?
Call or text for fast mobile Chevrolet locksmith service in Plano and DFW.