Common Chevrolet Silverado 3500HD Replacement Parts, 2020-2023

The Silverado 3500HD T1 ran from 2020-2023 and is current heavy duty platform. 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.

Glass and Wipers

The usual tell is a washer pump you can hear running with nothing coming out. Heat is the accelerant on this one, which is why it shows up faster here than up north.

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

Worth knowing: GM wiper arms and blades are matched to the specific windshield curvature, and length is not the only variable.

Sensors, Cameras and Driver Assistance

The usual tell is a park assist system that disables itself in cold weather and comes back warm. Catch it early and it is a parts bill. Ignore it and it becomes a parts and labor bill.

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

Worth knowing: Camera and radar aim is a service procedure, not a bolt-on.

Body and Exterior

The usual tell is a window that drops into the door or moves crookedly. How the vehicle gets used moves this interval more than the odometer does.

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

Worth knowing: Mirrors carry cameras, heaters, turn signals, blind zone modules and puddle lamps, and the wiring connector varies by content level.

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

Exhaust and Emissions

The usual tell is a P0420 or P0430 efficiency code. This is one of the items where a towing or work truck and a commuter diverge sharply.

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.

Heating and Air Conditioning

The usual tell is air that is cold at highway speed and warm at a stoplight. The number in the manual assumes conditions most people in North Texas do not have.

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

Worth knowing: R-1234yf systems on newer GM vehicles use different oils and fittings than older R-134a systems.

Before You Order

Have the VIN ready. On a Silverado 3500HD 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 Silverado 3500HD parts if you already know what you need.