My bone stock '00 2500 4x4 (100k miles) stalled about a month ago when I shifted from park to drive. The truck was already warm, and I immediately restarted it without a problem, and I dismissed the inident.

Fast forward to today...truck did the same thing numerous times after about 30 miles of easy driving, and also when going into reverse. The only differances are the weather and an SCT programmer. The first time the truck was stock and the outside temp was about 112 F. Today the outside temp is about 80, and about two weeks ago, I added an SCT program on Safe Tow (lowest setting). I ran the diagostics and there were no codes shown.

I do plan on getting a full gauge compliment very soon, but for now, I do not know what the fuel pressure is, but the truck normally runs well and never hesitates.

I would like to determine if this is an engine, fuel, or trans problem.

Any help would be apprecited, as this was very frustrating given the timing, and I would like to fix whatever problem becomes a bigger problem!!!