I bought a 2003 Chevrolet S-10 P.U at a used car dealer on 11-13-09, drove it home on 11-14-09 that evening. On 11-19-09, driving it home from the repair shop for not wanting to start, I pulled out onto the highway and the seat slid back on its tracks. On 11-29-09 leaving church, I pulled onto the highway and the seat slid back on its tracks again. I got it locked in place at the next stop light, and when I accelerated, it happened again. When I step on the gas pedal to accelerate, the seat rocks back, which appears to disengage the locking mechanism from the tracks, and the seat slides back. I drove it home on 11-14-09 that evening. It sat in the driveway until 11-17-09 that afternoon, when it got towed to the repair shop because it didn't start on 11-15-09. Picked it up on 11-19-09 around 5:30 pm sat in the driveway that evening. Drove it to work the next morning 11-20-09. Got done with work at 3:30 pm where the truck didn't start. Had it towed to repair shop. Being the weekend, and they're closed on weekends, it sat there through the weekend until 11-24-09 that afternoon got it back on 11-24-09. So for the short time I did have the truck, it happened on the three occurrences I described. I'm 5'-6" tall, so when I accelerate, and the seat rocks and slides back on its tracks, my feet are moved away from the accelerator and the brake pedals very quickly rendering them useless, until I can pull myself forward using the steering wheel and sliding up on the seat. Just double checking that the latch is down. Rocking back to check if it's locked. I have an appointment to take it back to the dealer on Thursday to check why it's not starting. I could probably have them check the seat also.

- Eagle River, AK, USA