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The 2000 GMC Sierra 1500 requires Dexron VI Transmission Fluid with a 5-quart capacity. This fluid serves as a lubricant, safeguarding the transmission components against heat-related damage. The cost for a transmission fluid replacement on your Sierra typically ranges from $180 to $230 for labor, with parts priced at $80. It is recommended to change the transmission fluid every 90,000 miles. Indicators that it's time for a change include grinding noises from the transmission, difficulty shifting gears, slipping during gear changes, sudden surges, and delayed movement after shifting into gear.
The 2000 GMC Sierra 1500 utilizes 1 quart of traditional transmission fluid with a 20w dexron iii-h/mercon specification.