Sierra 3500 4WD V8-6.0L (2008)
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Trailer Brake Control Module: Locations
Wheels/Vehicle Underbody Component Views
Left Rear Frame and Underbody Components (20/30 Series)
Left Rear Frame Rail (20/30 Series)
1 - Trailer Connector (UY7)
2 - Trailer Brake Controller Module (TBCM) (JL1)
3 - Trailer Brake Controller Solid State Relay (JL1)
Right Rear Frame and Underbody Components (31 Series)