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05 GMC Sierra Duramax Transmissoin fluid

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Hey Scotty, I have a 05 GMC Sierra 2500HD with 112,000 miles on it and a 5 speed automatic transmission, I was wondering when or if it should change my transmission fluid, it has not yet been changed thanks.

Clarification: How does the fluid look and is it shifting fine?

Shifts fine still smooth no bumps

1 Answer
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Really depends on what the fluid looks like and what @daywalker said. If its not burnt smelling or black. I’d do a drain and fill.

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