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2025 Chevrolet Silverado 3500HD maintenance schedule

The 2025 Silverado 3500HD is part of the T1XX generation (2020-2026), sold as a pickup. Below: its service intervals with the source behind each one, the fluids it takes, and the NHTSA recalls issued for it.

Service schedule

What the 2025 Silverado 3500HD 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 filter45,000 mi / 4 yearsManufacturer
Cabin air filter22,500 mi / 2 yearsManufacturer
Tire rotation

Validate DRW pressure

7,500 mi / 1 yearManufacturer
Brake fluid45,000 mi / 3 yearsManufacturer
Engine coolant150,000 mi / 5 yearsManufacturer
Transmission fluid

Change external Allison filter

45,000 miManufacturer
Spark plugs (L8T)97,500 miManufacturer
Serpentine belt97,500 mi / 10 yearsManufacturer
Differential and transfer case fluid

Massive 12.0-inch ring gear diff

45,000 miManufacturer
PCV valve (L8T)97,500 miManufacturer
12V batteryInspect, 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-30 (L8T), 15W-40 (L5P)
Coolant
Dex-Cool
Transmission fluid
Allison TES 668

Powertrains in this generation

  • 6.6L 8-cyl (L8T), 401 hp, 6/10-speed auto, RWD/4WD
  • 6.6L 8-cyl diesel (L5P), 10-speed Allison auto, RWD/4WD

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

Safety recalls

1 NHTSA recall for the 2025 Chevrolet Silverado 3500HD

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.

Fuel system, gasoline

NHTSA 26V129000

March 2026

General Motors, LLC (GM) is recalling certain 2025-2026 Chevrolet Silverado 3500, and GMC Sierra 3500 vehicles with gasoline engines and dual fuel tanks (RPOs L8T and N2N). The rear fuel pump may not transfer adequate fuel to the front tank, causing an engine stall.

Remedy: The vehicle's engine control module (ECM) will be updated by a dealer or through an over-the-air (OTA) update, free of charge. Owner notification letters were mailed April 8, 2026. Owners may contact GMC customer service at 1-800-462-8782 or Chevrolet customer service at 1-800-222-1020. GM's number for this recall is N262544420. Vehicle Identification Numbers (VINs) involved in this recall became searchable on NHTSA.gov on March 5, 2026.

Running costs

What maintenance typically costs

A typical year of maintenance
$1,320
Five years of maintenance
$7,200
The major service near 100,000 mi
$3,120

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

Other Silverado 3500HD model years

T1XX (2020-2026)

2020202120222023202420252026

K2XX (2015-2019)

20152016201720182019

Shopping new? The Chevrolet Silverado 3500HD 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 Silverado 3500HD for income?

Carlyle scores the exact listing on cost per remaining mile and projected Turo income, so you know what a 2025 Silverado 3500HD earns before you buy it.

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