The 1st Generation Sierra propelled GMC into the 21st century as its best-selling vehicle. With optional LS power, the Sierra can be just as capable at the track as it is the worksite. Whether you're building an all-around street machine, off-roader, or track weapon, Holley has the parts you need to make your dream a reality.

Take control of your vehicle’s accelerator with Edge Products throttle boosters featuring wireless throttle sensitivity adjustment. With the Amp’d 2.0, you can fine-tune pedal response on-the-fly or build a fully custom throttle curve right from the Android/iOS mobile app—perfect for eliminating lag, improving drivability, and dialing in performance for towing, off-road, or street use.