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engine knock
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  1. Trailblazer SS Engine Related Questions/Info
    My 2008 TBSS has 70,000 miles on it and I developed a engine noise . I was told it needed new lifter and paid a shop in Phoenix Arizona to repair it. When I got back it sounded the same as it did when I dropped it off. Before i had the new lifters installed. I was told it most likely was the oil...
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