I just bought a 06 Montana, as I was driving it home I noticed the engine was struggling at times. The to me would be at 2k the jump to 2300 for a second then go back down to 2k. I thought it might be a transmion issue. Before I left the dealership I had them pull the codes cause a check engine light was on. The codes that came up where p0641 and p0446. As I was going home from the dealer the van just died and it will not restart. Where do I start looking if dealer does nothing to fix it?

Both codes point at bad sensors, electrical wiring and/or connections, or bad PCM. P0641 also references several transmission states that when demanded are not satisfied. Hard to tell if these are related to whatever is causing the big problems or if these are erroneous issues caused by the big problems.

What part of the country does your Montana live in?

What does the odometer show?

Did it come with any kind of warranty?

Have you run a Carfax/Autocheck/etc. on this car?

​​​​​the vehicle is from Kansas, the odometer is reading approx. 129k, it did come with a limited warranty. I have called the dealer that I bought I from and he had me take it to a Chevy dealer to have it checked out. Im sitting in the wiring room right now to find out the results