One problem related to manual transmission has been reported for the 2007 Chevrolet Trailblazer. The most recently reported issues are listed below.
Transmission went out after driving it for only 2 days after purchase. Vehicle. Had 15 miles at purchase; towed in with 95 miles. Vehicle had no power in reverse nor drive. Gm only offered to repair or replace the trans. Would not replace vehicle or give money back. They placed a rebuilt. Trans in a new car and since then the vehicle. Has been giving me problems. Does not accelerate as prior to fix; hesitates when accelerating feeling like it's ready to stall. Gas pedal sticks at times; giving vehicle. Gas when I'm not pressing on the pedal. These are major safety issues. The selling dealer service dept took one day and 8 mile test drive to say they couldn't find nothing wrong with the car. Willing to leave vehicle. For 3 days, dealer would not write it up.