B0066.mp4 Apr 2026

: Right (passenger side) Frontal Deployment Loop.Specifically, these codes often point to a short to ground , an open circuit , or voltage out of range for the pretensioner—the device that pulls the seat belt tight in an accident. 2. Common Causes

While it may seem like a major component failure, the root cause is often a simple electrical break: b0066.mp4

: In trucks like the Colorado and Canyon, wires pass through a rubber boot in the door jamb. Years of opening and closing the door can cause these wires to stretch and eventually snap . : Right (passenger side) Frontal Deployment Loop

: Vibrations or seat adjustments can loosen the yellow connectors typically found under the seats. Years of opening and closing the door can

: Exposure to moisture can corrode impact sensors or wiring harness pins, disrupting the signal.

The code (often paired with B0065 ) is a diagnostic trouble code related to a vehicle's Supplemental Restraint System (SRS) , commonly found in General Motors vehicles like the Chevrolet Colorado and GMC Canyon. It indicates a fault in the passenger-side seat belt pretensioner circuit, which is critical for safety during a collision.