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The 2003 Chevy Avalanche requires Dexron VI transmission fluid. The estimated price for a transmission fluid change on a Chevrolet Avalanche 1500 falls between $144 and $165. Labor costs range from $89 to $110, with parts costing around $65. The transmission is a critical component of the vehicle and may encounter issues over time, such as stuck gears, jerking, hard shifts, shudders, slipping, or delayed shifts leading to acceleration problems. It is essential to promptly address any transmission fluid leaks.
The manual recommends using Dexron III, but using Dexron VI should also be okay.
The 2003 Chevy Avalanche requires dexron vi for its transmission fluid.