1981 GMC C3500 Electrical, Lighting and Wiring Parts

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Headlight & Taillight Wiring Diagram

Headlight & Taillight Wiring Diagram

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Check out this headlight wiring and taillight wiring diagram.

Grounding the Electrical System

Grounding the Electrical System

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Are your gauges reading erratically or does your car run out of power at high rpm? It may be the cause of a bad ground. Speedway Motors can show you how to diagnose and fix the problem in no time at all!

Installing 3" Ram Horn Manifolds on a C/10

Installing 3" Ram Horn Manifolds on a C/10

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See how to install 3" Ram Horn exhaust manifolds on a C/10 with a 406 engine. Learn some tips on welding steel tubing to a cast iron manifold and how they are modified to fit the truck.

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