Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSCHEVROLET2008SILVERADO 3500 4WD V8-6.0LREPAIR AND DIAGNOSISRELAYS AND MODULESRELAYS AND MODULES - BRAKES AND TRACTION CONTROLTRAILER BRAKE CONTROL MODULELOCATIONS
2008 Chevrolet Silverado 3500 4WD V8-6.0L
Trailer Brake Control Module: Locations
2008 Chevrolet Silverado 3500 4WD V8-6.0LSECTION 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)
Right Rear Frame Rail (31 Series):
1 - Trailer Brake Controller Solid State Relay
2 - Trailer Brake Controller Module (TBCM)
RENDER: 1.0x
NO RELATED
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.