Ignition Module problems of the 2007 Chevrolet Trailblazer

We were on vacation and we were getting ready to leave and we tried to unlock doors to enter vehicle and all doors except the driver door unlocked. A passenger leaned over to unlock the driver door and hit the driver window down switch. The key was not in the ignition. A burning smell was noticed and the driver door was completely dead. We were able to open the door and drive the vehicle. When I returned home I popped out the driver door module and noticed that the plastic case was melted. I opened the unit and noticed that a wiring harness connecting the 2 printed circuit boards was completely burned. Luckily this did not cause a major fire.

Vehicle was parked for the evening, turned off, no key in ignition, and unattended. Driver door module worked fine the previous day. The next morning, no parts of the module worked. Upon investigation, we discovered that the left side of the module by the driver window button had a burn spot on it and smelled like an electrical fire. The dealer quoted the part only price as over $300. 00. Updated 7/31/12 the dealer replaced the door lock module. Updated 08/01/12.

Check engine lightstarted coming on, then the stabil-trax and the engine deceleration light started coming on. When this started, the engine would shut down every time the lights came on. At first it was at intervals of 40 to 140 miles. Whenever the engine first started this, you could shut the ignition off for 1-2 min. , then the vehicle could be started and driven until the lights came on. Dotson Chevrolet, in big sonne gap, va. ( where we bought vehicle), has had the vehicle off and on for 6 weeks. They have changed the sending unit in the fuel tank, and the pcm module on the engine so far. As of today, 10-19-09 the vehicle is now shutting down at 8-10 miles. They say they are still checking , but now they are thinking the problem may be in the wiring. So far, we have luckily been driving in light traffic, where we were able to get out traffic to the side of the road, without any problem. If this problem occurs on the interstate of in heavy traffic , it could cause a serious accident. The dealer says the have been in contact with gm about the problem. I would have thought that gm would have tech people, of engineers that would know why the codes and lights don't correspond when this occurs, or would have some idea what might cause such a problem.