GMC Guides
Fitment and upgrade guides for every GMC we cover: lift kits, wheel fitment, tire sizes, bumpers and armor, lighting, winch and recovery, and performance. Built from factory specs, owner forums and real builds.
1. Choose Your GMC
Sierra 1500Half-ton Sierra guides
Sierra 2500 HDHeavy-duty Sierra guides
Sierra 3500 HDHeavy-duty Sierra guides
2. What Every Guide Covers
Every vehicle page links to the same seven guides, so once you know your way around one vehicle you know them all.
| Guide | What it covers | Shop |
|---|---|---|
| Lift Kits | Leveling kits vs full lifts, how much lift each tire size usually takes, and the supporting parts (track bars, control arms, bump stops) that come with more height | Lift Kits |
| Wheel Fitment | Bolt pattern, center bore, lug thread and torque, plus the width and offset combinations owners run without rubbing | Wheels |
| Tire Size | Factory sizes by trim, the biggest tire for each lift height, load range and speedometer calibration | Tires |
| Bumpers & Armor | Winch bumpers, rock sliders and skid plates, and the sensors, cameras and fog lights that have to carry over | Bumpers |
| Lighting | LED headlights, fogs, tail lights, light bars and rock lights, wiring through a fuse and relay, and headlight aiming | Lighting |
| Winch & Recovery | Winch sizing from your vehicle's GVWR, mounting options and the recovery gear worth carrying | Winches & Recovery |
| Performance | Tuners, intakes, exhaust, brakes and gearing, split by engine so you only see what fits yours | Performance |
Not sure what fits your GMC? Call 419-670-3141 or email sales@offroadsource.info for a free fitment check.