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Circuit Description

WARNING: This page is about a different car, the 2002 GMC Sierra, 2002 GMC Cab & Chassis Sierra, 2002 Chevrolet Silverado, and 2002 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.

The Transmission Control Module (TCM) can be calibrated to communicate with an electronically-controlled engine via a BUS circuit (SAE J1939). Diagnostic information is also communicated via the BUS circuit. This DTC applies to the 6.6L engine only.

This is a type "B" DTC.

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