GM Parts Club
Most suspension problems announce themselves well before they strand anybody. On a 2015-2019 Sierra 2500HD, these are the ones worth acting on.
1. The nose diving noticeably further under braking than it did new
This one is usually early, which is good news, because it is cheap to fix early. Start by looking at struts.
2. A clunk over expansion joints that you feel in the floor more than you hear
This one is usually early, which is good news, because it is cheap to fix early. Start by looking at ball joints.
3. The body keeps moving after you cross a dip instead of settling once
By the time this is obvious you are generally replacing more than one part. Start by looking at struts.
4. Uneven or feathered tire wear on the inside or outside shoulder
By the time this is obvious you are generally replacing more than one part. Start by looking at ball joints.
5. A ride height that sits lower on one corner
This one is usually early, which is good news, because it is cheap to fix early. Start by looking at shocks.
What to Do Next
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.
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.
We have been selling GM parts online since 2009 and out of the Dallas store since 1956. Start with our GMC OEM parts catalog, or search for Sierra 2500HD shocks.
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