The throttle and accelerator pedal is very HOT- highly sensitive, resulting in jerky lunging upon start off in 1st gear from a dead or 1 mph stop. The vehicle has been into the dealer 2 times for this issue with the same repair comments, vehicle meets all factory specs and all XT 4 react this way- well that's not safe. If that's the case, then this is a design defect which is unsafe as the accelerator pedal reacts to quickly with a non-smooth action and lunging which could cause a rear end collision. Other car evaluators have also indicated the XT6 has a jerky accelerator, just like what I am reporting. It may be the TPS -Throttle Position sensor in combination with the APS-Accelerator Position sensor. Sometimes it is so violent it throws occupants backward into the seats. Dealer says within spec. GM needs to solve this issue.

- Reno, NV, USA