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2021 Chevrolet Blazer maintenance schedule

The 2021 Blazer is part of the C1XX generation (2019-2026), sold as an SUV. Below: its service intervals with the source behind each one, the fluids it takes, the problems owners report for this year, and the NHTSA recalls issued for it.

Service schedule

What the 2021 Blazer needs, and when

All 12 of these items come from Chevrolet's own published schedule. Manufacturer rows link to Chevrolet's own schedule, Independent rows to a service shop or parts retailer's published guide.

ServiceIntervalSource
Engine oil and filter

OLM dictated

7,500 mi / 1 yearManufacturer
Engine air filter

Inspect at each oil change

45,000 mi / 4 yearsManufacturer
Cabin air filter22,500 mi / 2 yearsManufacturer
Tire rotation7,500 mi / 1 yearManufacturer
Brake fluid

Replace fluid completely

45,000 mi / 3 yearsManufacturer
Engine coolant150,000 mi / 5 yearsManufacturer
Transmission fluid

Severe service interval

45,000 miManufacturer
Spark plugs97,500 miManufacturer
Serpentine belt97,500 mi / 10 yearsManufacturer
Differential and transfer case fluid

AWD models

45,000 miManufacturer
PCV valve97,500 miManufacturer
12V battery

Test annually

Inspect, replace as neededManufacturer

Intervals are for normal driving; towing, short trips, extreme heat or dust shorten them.

Fluids and engines

What goes in it

Engine oil
5W-20 (LCV), 0W-20 (LSY), 5W-30 (LGX)
Coolant
Dex-Cool
Transmission fluid
Dexron VI

Powertrains in this generation

  • 2.5L 4-cyl (LCV), 193 hp, 9-speed 9T50, FWD
  • 2.0L 4-cyl (LSY), 228 hp, 9-speed 9T50, FWD/AWD
  • 3.6L 6-cyl (LGX), 308 hp, 9-speed 9T65, FWD/AWD

Confirm the exact spec against the owner's manual or the label under the hood; capacities vary by engine and drivetrain.

Known problems

What 2021 Blazer owners run into

Problems reported for this model year, with the mileage they tend to show up at. Buying past a window is not automatically a pass - it just needs to be priced in.

9T65 transmission shudder

high severity

40,000-80,000 mi · $400-$4,500 to fix

Harsh shifting

Source: repairpal.com

Shift to Park microswitch

medium severity

30,000-60,000 mi · $250-$500 to fix

Vehicle remains awake in park

Source: repairpal.com

Safety recalls

1 NHTSA recall for the 2021 Chevrolet Blazer

From NHTSA's recall database, matched by model and year. Recall repairs are free at Chevrolet dealers, and a given car may already be fixed or fall outside a campaign, so check the VIN at nhtsa.gov/recalls before you buy.

Seat belts

NHTSA 20V811000

December 2020

General Motors, LLC (GM) is recalling certain 2020 Chevrolet Bolt EV and 2021 GMC Canyon and Sierra 1500, 2500 and 3500, Yukon, Yukon XL, Cadillac Escalade and Escalade ESV and Chevrolet Blazer, Camaro, Colorado, Equinox, Silverado 1500, 2500 and 3500, Suburban and Tahoe vehicles. Incorrect bolts may have been used at one or more fastening locations to secure the seat belts to the vehicle. If an incorrect bolt was used, the seat belt may not be properly attached to the vehicle.

Remedy: GM will notify owners, and dealers will replace the suspect bolts, free of charge. The recall began January 29, 2021. Owners may contact GMC customer service at 1-800-462-8785, Cadillac customer service at 1-800-458-8006, or Chevrolet customer service at 1-800-222-1020. GM's number for this recall is N202322230.

Running costs

What maintenance typically costs

A typical year of maintenance
$715
Five years of maintenance
$4,180
The major service near 100,000 mi
$1,540

Typical US independent-shop estimates for this generation; they vary by region and condition.

Other Blazer model years

C1XX (2019-2026)

20192020202120222023202420252026

Shopping new? The Chevrolet Blazer guide covers the current model, with what it costs to keep for 1 to 15 years.

Sources

Researched 2026-09-18. Modeling, not mechanic advice - always confirm against your car's owner's manual and service records.

Running a Blazer for income?

Carlyle scores the exact listing on cost per remaining mile and projected Turo income, so you know what a 2021 Blazer earns before you buy it.

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