Two problems related to battery dead have been reported for the 2003 Chevrolet Trailblazer. The most recently reported issues are listed below.
Chevrolet Trailblazer 2003 automatic, having problem shifting. The consumer stated the vehicle hesitated for 5 seconds, then slowly accelerated to the speed the consumer needed. The battery died due to a module problem.
1st incident (July 2004): while driving about 20 mph, vehicle stalled in the middle of the road. Could not get it to start and key locked in ignition while truck was still in gear. Other times previous, vehicle took a few times to start. Ignition switch was intermittent. While in for repair first time, found that when vehicle stalled, it lost ignition input. Codes that came up with scan check were u1000, u1016, u1152, b1372 and u1088. Ignition switch was replaced with new, fp#12450251-switch 2. 188 r. All other fuses and wiring to ignition were found to be "ok". 2nd-current incident (October 2006): vehicle took several times to start (same as original problem). Vehicle would turnover but would not start engine. Tried several times before battery died. Current evaluation from service tech is that the ignition switch is bad. Key is locking in ignition and can't move gears. Tow driver had to "jump" battery to get vehicle in and out of neutral for tow and to remove key from ignition. Still waiting on extended warranty provider to approve this replacement (although the original warranty provider is now bankrupt). We may have to pay for this repair out of pocket if warranty issue is not resolved.