2020 GMC Sierra 1500 Wheel Alignment Specifications

Quick reference

Adjustability

On the 2020 GMC Sierra 1500, the front alignment offers adjustment for caster and toe. Front camber, however, is not directly adjustable from the factory. To correct front camber issues, aftermarket solutions such as specialty cam bolts or adjustable control arms are typically required. The rear axle on the 2020 GMC Sierra 1500 generally has non-adjustable camber and toe from the factory. Any significant deviation in rear alignment usually indicates bent suspension components, which would require replacement.

Recommended adjustment hardware

Since front camber is not factory-adjustable on the 2020 GMC Sierra 1500, if you find your front camber outside of the acceptable range, you will likely need aftermarket solutions. Popular options include eccentric cam bolts that replace the lower control arm bolts, allowing for camber adjustment. Brands like SPC Performance or Moog offer such kits. For rear alignment issues that aren't due to bent components, some aftermarket kits may offer eccentric bushings for minor adjustments, but significant issues typically point to more serious damage.

Symptoms of bad alignment

Identifying alignment issues early can save you from costly premature tire wear and potential safety hazards. Here are some common symptoms and accompanying tire wear patterns:

• Uneven tire wear: This is the most common indicator. If your tires are wearing more on one side (inner or outer shoulder), it often points to incorrect camber. If both shoulders are wearing, or the center is wearing excessively, it could be under- or over-inflation, but check alignment as well. Feathered wear (one side of the tread block is worn smooth while the other side is sharp) often indicates a toe issue.
• Vehicle pulling or drifting: If your Sierra consistently pulls to one side when driving on a flat road, or if you constantly have to correct the steering to keep it going straight, your caster or camber could be off.
• Steering wheel off-center: Even if the vehicle tracks straight, a crooked steering wheel when driving in a straight line typically indicates an issue with total toe.
• Vibration: While vibrations can stem from many sources (unbalanced tires, bent wheels), an alignment issue can sometimes contribute, especially at higher speeds.
• Loose or wandering steering: If your truck feels less stable or wanders on the road, particularly at highway speeds, it could be a sign of insufficient caster or excessive toe.

When to align

To ensure optimal handling, tire longevity, and safety, it's recommended to get an alignment in the following situations:

• After suspension or steering component replacement: Any time components like tie rods, ball joints, control arms, or wheel bearings are replaced, an alignment is crucial.
• After installing new tires: New tires should always be accompanied by an alignment to ensure they wear evenly from the start.
• After hitting a significant pothole or curb: A hard impact can easily knock your alignment out of spec.
• Every 12-18 months or 15,000 miles: Even without obvious symptoms, alignment can drift over time due to normal wear and tear or minor impacts.
• If you notice any of the alignment symptoms listed above.

Typical alignment cost

In most parts of the country, a typical four-wheel alignment for a 2020 GMC Sierra 1500 can cost anywhere from $100 to $180. Prices can vary based on your location, the specific shop, and whether any specialty adjustments or parts (like cam bolts) are needed. It's important to note that this cost is a small investment compared to the price of prematurely replacing a set of truck tires.

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