2017-2023 GMC Acadia Parts Guide: What Owners Replace First

The Acadia 2nd Gen ran from 2017-2023 and is the smaller Acadia. 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.

Ignition and Engine Management

The usual tell is a check engine light that flashes under load, which means raw fuel is going into the converter. Catch it early and it is a parts bill. Ignore it and it becomes a parts and labor bill.

Common parts in this group: spark plugs, ignition coils, camshaft position sensors, crankshaft position sensors, oxygen sensors.

Worth knowing: Coil primary resistance affects dwell, and the ECM is calibrated for the factory value.

Exhaust and Emissions

The usual tell is a P0420 or P0430 efficiency code. The number in the manual assumes conditions most people in North Texas do not have.

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 carpet that stays damp under a worn factory mat. This is one of the items where a towing or work truck and a commuter diverge sharply.

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

Worth knowing: GM Accessories liners are laser-measured to the specific floor pan and retain the factory anchor posts, which is a safety item.

Glass and Wipers

The usual tell is a rain sensing system that triggers late or not at all. Worth checking at the same time you rotate tires, since the wheel is already off.

Common parts in this group: wiper blades, wiper transmissions, wiper motors, washer pumps, rain sensors.

Worth knowing: Vehicles with rain sensing or heated wiper park use different assemblies.

Drivetrain and Transfer Case

The usual tell is vibration that appears above 55 mph and grows with speed. Worth checking at the same time you rotate tires, since the wheel is already off.

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

Worth knowing: CV axle length and spline count vary by ride height package on the same truck.

Brakes

The usual tell is uneven pad thickness side to side when you pull a wheel. Owners who do mostly short trips see this sooner than the mileage suggests.

Common parts in this group: brake pads, brake rotors, brake calipers, brake hoses, wheel speed sensors.

Worth knowing: Aftermarket rotors are frequently thinner at the same nominal diameter, which changes heat capacity and warp behavior.

Before You Order

Have the VIN ready. On a Acadia 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.

If you are not sure which version fits your build, send us the VIN and we will confirm before anything ships. Shop our GMC OEM parts catalog or search for Acadia parts.