Maintenance / 2001 Silverado 1500 2WD · Automatic 4-speed · 8 cyl · 4.8 L

Automatic transmission fluid

Match the fluid to the exact transmission, not just the vehicle model. A drain-and-refill amount differs from the total dry capacity.

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IntervalReplace at 50,000 mi (83,000 km) under severe use; normal service lists 100,000 mi (166,000 km).Verified

01 / Requirements

Configuration-specific service and fitment facts

These sourced values are shared by the specification sheet and the maintenance guides for this exact configuration.

Transmission fluid

Automatic transmission fluid: DEXRON III automatic transmission fluid Verified

Castrol Transmax DEX/MERC Automatic Transmission Fluid

DEXRON III-compatible automatic-transmission fluid · One container holds 1 US gallon (3.785 L). Castrol specifies DEXRON-IIIH compatibility. Confirm the installed automatic transmission and use GM’s filter-change and level-check procedure; a complete service also requires its correct filter and seal. The routine refill quantity and those parts remain unverified, so this gallon is not a complete service kit.

Part number: 03520 · 1 US gallon (3.785 L)

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Level and compatibility: Use the specified fluid and the transmission-specific level-check procedure. Conventional ATF, belt-CVT fluid and manual gear oil are not interchangeable.
Severe-service conditions: For this non-Allison transmission, the 50,000-mile fluid-and-filter service applies with GVWR above 8,600 lb, frequent traffic at 90°F (32°C) or hotter, mountainous use, frequent trailer towing, or taxi/police/delivery service. Otherwise the first fluid-and-filter service is at 100,000 miles. Confirm the installed transmission and obtain the required filter, seal and service procedure before purchase.