How do I determine which rear end gear is in my chevy trailblazer?

February 12th, 2010 | by admin |
David asked:


I’m looking to buy a used Chevy trailblazer. I know that Chevy used three different rear end gears in the trailblazers. Most of my driving will be around town, so I want the gear that will give me the best fuel mileage. How do I go about determining which rear end gear is in a particular trailblazer?

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    1. No Responses to “How do I determine which rear end gear is in my chevy trailblazer?”

    2. By REV B on Feb 13, 2010 | Reply

      Open the glove box and look at the codes.
      GU6- 3.42
      GT4- 3.73
      GT5-4.10
      G80- locking rear diff

    3. By buck b on Feb 14, 2010 | Reply

      The 342 will be lower at higher speeds.

    4. By Demolition Man on Feb 17, 2010 | Reply

      You can also ask the parts counter at the dealer and give them the VIN and they will tell you.

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