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2026 Chevrolet Silverado 3500HD maintenance schedule

The 2026 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 2026 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

3 NHTSA recalls for the 2026 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.

Equipment

NHTSA 26V114000

February 2026

General Motors has decided that certain 2027 Chevrolet Bolt EV, 2025-2026 Cadillac OPTIQ, Chevrolet Colorado, Equinox EV, GMC Canyon, 2026 Buick Enclave, Envision, Cadillac CT5, Escalade, Escalade ESV, Escalade IQ, Escalade IQL, LYRIQ, VISTIQ, Chevrolet Blazer EV, Corvette Convertible, Corvette Coupe, Corvette Convertible E-Ray, Equinox, Silverado 1500, 2500, 3500, Silverado EV, Suburban 1500, Tahoe, Traverse, GMC Acadia, Hummer EV Pickup, Hummer EV SUV, Sierra 1500, 2500, 3500, Sierra EV, Terrain, Yukon, and Yukon XL vehicles. The radio may not have been set to the correct status to download the electronic owner's manual during production. As such, these vehicles fail to comply with the requirements of Federal Motor Vehicle Safety Standard number 208, “Occupant Protection.”

Remedy: Dealers will reset the vehicle radio, which will facilitate automatic download of the electronic owner’s manual, free of charge. Owner notification letters were mailed April 16, 2026. Owners may contact GM customer service at 1-866-467-9700, Chevrolet customer service at 1-800-222-1020 or Cadillac customer service at 1-800-333-4223. The manufacturer's number for this recall is N252540430. Vehicle Identification Numbers (VINs) involved in this recall became searchable on NHTSA.gov on February 26, 2026.

Equipment

NHTSA 25V815000

November 2025

General Motors, LLC (GM) is recalling certain 2026 Chevrolet Silverado 1500, 2500, and 3500 vehicles. These vehicles may not have received an owner's manual during production. As such, these vehicles fail to comply with the requirements of Federal Motor Vehicle Safety Standard number 225, “Child Restraint Anchorage Systems.”

Remedy: Dealers will provide the owner’s manual, free of charge. Owner notification letters were mailed December 30, 2025. Owners may contact Chevrolet customer service at 1-800-222-1020. GM's number for this recall is N252532020. Vehicle Identification Numbers (VINs) involved in this recall became searchable on NHTSA.gov on November 25, 2025.

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 2026 Silverado 3500HD earns before you buy it.

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