Pre-Winter Cooling System Check for Your 2019-2024 Chevrolet Blazer

Coolant condition, hoses and the surge tank. Applied to a 2019-2024 Blazer, here is what that looks like.

Filters and Fluids

Watch for a slight hesitation on hard acceleration with a dirty air filter. Follow the oil life monitor rather than a fixed mileage. Engine air filter every 30,000 to 45,000 miles. Transmission service intervals vary widely by transmission and by whether you tow.

Ignition and Engine Management

Watch for a rough idle that smooths out above 2,000 rpm. Iridium plugs on most modern GM engines are a 90,000 to 100,000 mile item. Coils are replaced on failure, not on a schedule.

Suspension

Watch for uneven or feathered tire wear on the inside or outside shoulder. Shocks and struts are wear items. Plan on inspection at 50,000 miles and replacement somewhere between 60,000 and 100,000 depending on road quality and load.

Sensors, Cameras and Driver Assistance

Watch for a backup camera image that flickers, goes blue, or shows lines. TPMS sensor batteries typically last seven to ten years and are commonly replaced as a set during a tire change.

The Short Version

Oil filters: Engine size and emissions equipment change the filter, and diesel filter kits in particular are not interchangeable across model years.
Spark plugs: The same nameplate can have three different engines in one model year. VIN is the only reliable way to get the right plug.
Shocks: Trim and package content matters enormously here. Off-road packages, air ride and adaptive or magnetic damping all use different parts than the base vehicle wearing the same model name.
Park assist sensors: Painted park assist sensors are ordered in primer and painted to your code. Confirm your paint code before ordering.

Everything here is available as a genuine GM part through our Chevrolet OEM parts catalog. If you would rather search directly, search for Blazer parts.