GM Parts Club
The suspension system on the 2020-2026 Sierra 2500HD is not complicated, but it is easy to spend money in the wrong place on it. This is the version we give people at the counter.
What You Will Notice First
- A ride height that sits lower on one corner
- The nose diving noticeably further under braking than it did new
- Uneven or feathered tire wear on the inside or outside shoulder
- The body keeps moving after you cross a dip instead of settling once
None of these are emergencies on day one. All of them get more expensive if you sit on them.
The Parts Involved
- Shocks.
- Struts.
- Control arms.
- Ball joints.
- Sway bar links.
- Coil springs.
- Leaf springs.
- Strut mounts.
- Air ride compressors.
Why the Factory Part Matters Here
- GM valving is tuned to the specific spring rate and curb weight of your trim, and a generic replacement changes the whole balance.
- Vehicles with adaptive or air suspension talk to the module, and non-OEM parts often will not report correctly.
- Ball joint and control arm geometry sets your alignment range, and an out-of-spec part can make a correct alignment impossible.
Service Interval
Shocks and struts are wear items. Plan on inspection at 50,000 miles and replacement somewhere between 60,000 and 100,000 depending on road quality and load.
Ordering Notes
Trim and package content matters enormously here. Off-road packages, air ride and adaptive or magnetic damping all use different parts than the base vehicle wearing the same model name. On the Sierra 2500HD specifically, trim and package content is the thing that trips people up.
Ordering is easiest if you have the VIN in front of you. Head to our GMC OEM parts catalog to shop by vehicle, or search for shocks to go straight to a part.
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