Most Replaced Parts on the K2XX GMC Sierra 1500 (2014-2018)

The Sierra 1500 K2XX ran from 2014-2018 and is the generation before the carbon fiber bed and Multi-Pro tailgate. After enough of these come across the parts counter you start to see the same short list of components over and over. Here is what owners of this generation actually end up buying, and what to know before you order.

Filters and Fluids

The usual tell is a slight hesitation on hard acceleration with a dirty air filter. Owners who do mostly short trips see this sooner than the mileage suggests.

Common parts in this group: oil filters, air filters, cabin air filters, fuel filters, transmission filters.

Worth knowing: Dexos1 and dexos2 licensing exists because GM engines have specific requirements, and warranty language references it directly.

Body and Exterior

The usual tell is a hazy or yellowed headlamp lens that no longer projects a sharp cutoff. Mileage is a rough guide here. Load, heat and road surface matter more.

Common parts in this group: mirrors, door handles, grilles, bumper covers, headlamps.

Worth knowing: Factory paint codes only work if the substrate and primer are the same.

Drivetrain and Transfer Case

The usual tell is a clunk on the transition from drive to reverse. This is one of the items where a towing or work truck and a commuter diverge sharply.

Common parts in this group: transfer case encoder motors, front differential actuators, u-joints, CV axles, driveshaft center bearings.

Worth knowing: Wheel bearings on modern GM trucks carry the wheel speed sensor in the same assembly, and sensor tolerance affects ABS and stability control.

Electrical and Charging

The usual tell is power windows or seats getting slower over a season. Catch it early and it is a parts bill. Ignore it and it becomes a parts and labor bill.

Common parts in this group: batteries, battery cables, alternators, starters, body control modules.

Worth knowing: Auxiliary and stop-start systems use AGM batteries, and dropping a flooded battery in is a short path to a repeat failure.

Exhaust and Emissions

The usual tell is a check engine light that appears after fueling and clears itself. Heat is the accelerant on this one, which is why it shows up faster here than up north.

Common parts in this group: catalytic converters, oxygen sensors, DEF injectors, diesel particulate filters, EVAP purge valves.

Worth knowing: EVAP components are leak-rate sensitive, and the monitor is comparing against a factory reference.

Interior

The usual tell is a sun visor that will not stay up. Mileage is a rough guide here. Load, heat and road surface matter more.

Common parts in this group: floor liners, carpet floor mats, console lids, seat covers, shift knobs.

Worth knowing: Genuine trim matches grain and color code, which universal parts never quite do.

Before You Order

Have the VIN ready. On a Sierra 1500 the same model year can carry two or three different engines and several suspension packages.
Check the SPID label in the glove box or console for your RPO codes.
Front and rear parts are rarely the same number, even when they look identical.
If the part is electrical, confirm the fit before you order. Electrical parts are not returnable at any GM dealer, including us.

Everything here is available as a genuine GM part through our GMC OEM parts catalog. If you would rather search directly, search for Sierra 1500 parts.