Recently acquired a 2005 GC SXT (3rd GC) and the power door locks on both sliding doors do not work. Also, the child safety look feature does not make any difference in either position. Additionally, the auto lock at 18 miles per hour does not work for the sliding doors. The other power door locks work fine both by the door switch or the fob. The only way to unlock the sliding doors is by hand. All opening and closing features work properly. Not knowing the vehicle history, I know little about what was repaired in the past. 85K miles and have been working on cars for many years. This one has me stumped. Any suggestions or ideas to try would be greatly appreciated.