Most Replaced Parts on the T1 Chevrolet Suburban (2021-2023)

The Suburban T1 ran from 2021-2023 and is IRS and a much larger third row. 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.

Suspension

The usual tell is uneven or feathered tire wear on the inside or outside shoulder. Heat is the accelerant on this one, which is why it shows up faster here than up north.

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

Worth knowing: Vehicles with adaptive or air suspension talk to the module, and non-OEM parts often will not report correctly.

Cooling System

The usual tell is crusty orange residue around a hose clamp or the surge tank seam. 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: Aftermarket radiators frequently use fewer rows or thinner tanks than the original, which shows up as a heat problem only when you tow.

Heating and Air Conditioning

The usual tell is air that only blows on the highest fan setting. Owners who do mostly short trips see this sooner than the mileage suggests.

Common parts in this group: cabin air filters, blower motors, blower motor resistors, A/C compressors, condensers.

Worth knowing: Condenser and evaporator core dimensions are specific, and a near-fit leaks at the seal.

Drivetrain and Transfer Case

The usual tell is vibration that appears above 55 mph and grows with speed. Catch it early and it is a parts bill. Ignore it and it becomes a parts and labor bill.

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.

Ignition and Engine Management

The usual tell is fuel economy that drifts down a mile or two per gallon over a few months. The number in the manual assumes conditions most people in North Texas do not have.

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 pedal that sits lower than it used to, or sinks slowly at a stoplight. 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 Suburban 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 stock genuine GM parts for every nameplate on this list and ship nationwide from Dallas. Start at our Chevrolet OEM parts catalog, or search for Suburban parts if you already know what you need.