Dexron III or Dexron VI?
Senior Member
Joined: 04-07-2008
Posts: 1,051
From: Wisconsin
Dex VI also runs cooler. I used it my my old Trailblazer and I towed a travel trailer. Never used an extra trans cooler, just the one built in. That truck has a 160k miles on it now. Transmission is as strong as ever.
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