Gonna really depend on what engine & gearing, regular or EXT Trailblazer, and what size TM you have. I have an Envoy XUV (GMC version of Trailblazer) with extended wheelbase, 5.3 V8 & 3.73 gears, and my 3326 gives it a run for the money on hills.
Long story short, need more details.
Oh and if you need any help with your Trailblazer I know these trucks inside out.
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2007/21 TM 3326 (Pride of the Fleet)
2000 2720SL (Rebuild Project)
2002 2619 (Parts TM)
SMARTER THAN GOOGLE!
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