2020-2023 Buick Encore GX Parts Guide: What Owners Replace First

The Encore GX 1st Gen ran from 2020-2023 and is 1.2L and 1.3L turbo three-cylinder. 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.

Exhaust and Emissions

The usual tell is a diesel that regenerates far more often than it used to. Owners who do mostly short trips see this sooner than the mileage suggests.

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

Worth knowing: Catalytic converters are emissions-certified parts, and substrate loading is what the downstream oxygen sensor is judging.

Drivetrain and Transfer Case

The usual tell is a clunk on the transition from drive to reverse. Owners who do mostly short trips see this sooner than the mileage suggests.

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

Worth knowing: Transfer case shift motors and encoders are matched to the specific case, and the module reads their position directly.

Cooling System

The usual tell is a temperature gauge that climbs in traffic and drops back on the highway. Mileage is a rough guide here. Load, heat and road surface matter more.

Common parts in this group: radiators, water pumps, thermostats, coolant hoses, cooling fans.

Worth knowing: Surge tanks and caps are pressure-rated to the specific system, and a wrong cap is a slow way to cook a head gasket.

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. This is one of the items where a towing or work truck and a commuter diverge sharply.

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

Worth knowing: Oxygen sensor response time is what the fuel trim strategy is built around; slow generic sensors cause driveability problems that never set a clean code.

Brakes

The usual tell is a grinding noise, which means the friction material is already gone. Heat is the accelerant on this one, which is why it shows up faster here than up north.

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

Worth knowing: GM friction material is matched to the specific rotor metallurgy and the ABS calibration on your vehicle.

Glass and Wipers

The usual tell is chattering or streaking that returns within a week of new blades. How the vehicle gets used moves this interval more than the odometer does.

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

Worth knowing: Windshields with acoustic interlayer, HUD or camera brackets are not interchangeable with base glass.

Before You Order

Have the VIN ready. On a Encore GX 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.

We are a factory GM dealer, not a reseller, so what you order is the same part the service drive installs. Browse our Buick OEM parts catalog or search for Encore GX parts.