Common Chevrolet Trailblazer Replacement Parts, 2021-2023

The Trailblazer 1st Gen ran from 2021-2023 and is 1.2L and 1.3L 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.

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

Cooling System

The usual tell is a temperature gauge that climbs in traffic and drops back on the highway. Catch it early and it is a parts bill. Ignore it and it becomes a parts and labor bill.

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. Owners who do mostly short trips see this sooner than the mileage suggests.

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

Worth knowing: Plug gap, heat range and electrode material are specified per engine, and GM’s Active Fuel Management and Dynamic Fuel Management engines are sensitive to it.

Sensors, Cameras and Driver Assistance

The usual tell is a TPMS light that will not clear after a tire rotation. This is one of the items where a towing or work truck and a commuter diverge sharply.

Common parts in this group: park assist sensors, backup cameras, blind zone modules, front camera modules, radar sensors.

Worth knowing: TPMS sensors have to match the protocol and frequency the receiver expects.

Brakes

The usual tell is a pedal that sits lower than it used to, or sinks slowly at a stoplight. Catch it early and it is a parts bill. Ignore it and it becomes a parts and labor bill.

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.

Suspension

The usual tell is a clunk over expansion joints that you feel in the floor more than you hear. Worth checking at the same time you rotate tires, since the wheel is already off.

Common parts in this group: shocks, struts, control arms, ball joints, sway bar links.

Worth knowing: Ball joint and control arm geometry sets your alignment range, and an out-of-spec part can make a correct alignment impossible.

Before You Order

Have the VIN ready. On a Trailblazer 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 Chevrolet OEM parts catalog. If you would rather search directly, search for Trailblazer parts.