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What type of Transmission fluid should I use?

I recently purchased a 2003 full size GMC truck, with a 6 cyl. engine. What type of transmission fluid, should I use?

3 Answers

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  • 1 decade ago
    Favorite Answer

    Mercon 3

  • k
    Lv 4
    1 decade ago

    for an automatic transmission? There's only a few kinds and it will say what kind to use in the owners manual, or, the guys at the auto parts store can look it up on the computer for you. or you could call a dealer.

  • Anonymous
    1 decade ago

    look in ur owners manual and MKE SURE TO ONLY USE NAME BRAND ORANGE COOLANT!!! if u use anything else it will kill your car

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