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The 2003 Chevy Avalanche can hold up to 5 quarts of transmission fluid, specifically Dexron VI or ATF 4. This fluid is available in one-quart containers at many retail stores and auto parts shops, as well as online from a trusted seller. Prices for a bottle range from $4 to $17. If you opt to have a mechanic or automotive technician replace the fluid, expect to pay labor costs ranging from $40 to $89 on top of the fluid cost.
The 2003 Chevy Avalanche can hold up to 5 quarts of transmission fluid.
Five and a quarter quarts