I have a GMC Jimmy with the V6 4.3L and I believe they may have put that into the Trailblazer, also. We have been happy with the V6 and when towing the 2619 TM, we still get around 15 MPG. Two places that have slowed us down to 45 are Lookout Pass on the Idaho/Montana border and that wonderful stretch leading up to the Eisenhower tunnel, west of Denver. Other than that we usually tow at 65 MPH with the tow button on and the cruise control set. Our trip last year covered over 9500 miles. I'm glad the gas was cheaper then!
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