GMC Jimmy Timing Covers

Understand GM’s AFM system—how it operates, it’s pros and cons, common lifter failures, and your options for tuning, disabling, or full AFM delete.

Choosing new wheels for a GMC Chevrolet truck. This project uses Speedway Motors GM Rally Wheels and new tires to enhance the appearance of the truck.

Improve speed and utilize practice time efficiently by gaining awareness of corner times.

What happens when you advance or retard a camshaft? In this tech article, we explain the pros and cons of installing your cam straight up, advancing or retarding.

Jason Martin is in the pits at 305 Racesaver Nationals talking to racers about topics they would like more information on. Follow along as Jason Martin gives advice on how to set your birdcage.

Decode, ID, and upgrade your GM 12-bolt rear end. Learn axle specs, gear ratios, and best performance parts upgrades.

A guide to choosing the right camshaft for your engine. See how to install a new LSR roller camshaft while upgrading valve springs and rocker trunnions.

Steve provides a step-by-step guide to install the Speedway Motors GM 10-Bolt Polished Finned Aluminum Rear End Cover.

Learn more about GM steering column identification, GM steering column lengths, and GM steering column compatibility.

Here's our attempt to do the impossible: pick a favorite GM truck design!