Chevrolet & GMC Articles

Chevrolet Silverado dashboard at night with a GM transponder key in the ignition and the red SECURITY warning light glowing on the instrument cluster

GM VATS, PASSLock, and PASS-Key III Failures: A Technician's Complete Diagnostic Guide for Silverado and Tahoe Owners

VATS, PASSLock, and PASS-Key III are three completely different anti-theft architectures across GM's truck and SUV lineup. A working Burbank automotive security technician's breakdown of how each generation works, how each fails, and what the correct diagnostic and repair workflow looks like on a Silverado, Tahoe, Suburban, Sierra, Yukon, or Colorado.

May 18, 2026 18 min read

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