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The OP said I don't do car stuff, to me that says ... how tight is tight enough??? "Johnny Hamfist" would have no problem snapping off a bunch 10 mm bolts "those are the folks who should "Use a Torque Wrench" ... pretty much that simple.
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Then once again, I ask you: WHAT spec do you suggest he torque the bolts to? In other words, how many inch/pounds would you suggest he set the torque wrench to? I mean, he can't just attach the torque wrench to his socket and tighten it without first setting a torque! Like I said, GM does not have a spec (torque setting) for those bolts so you would just take a guess? How is that any different than using your best judgment as to when a bolt is tight ? LOL.