Hey all.... so a couple weeks ago my hummer 03 H2 was running g great as usual. Doing 75 on freeway with cruise on. Then I felt a fumble and a few seconds later it did it again. Then the third time I moved over to right lane and tapped break to turn cruise off. It literally stopped running g at that point and I pulled over. I had 0 codes for cam or crank sensor and I'm getting fuel. Cam, fuel pressure regua
lator and crank are really only culprits i can think of as my fuel pump is running and it tries to fire. I guess my question is what could do this with absolutely no warning? Like I said it was running great and I had no warning signs of anything... ecm or pcm? I hate to throw parts at it but those are only things I can think of. I did change fuel filter for grins... anyway long diatribe I know, but thanks for any thoughts or suggestions....

 

the engine wont run if the coolant sensor is bad or bad wiring to it. check your temps with a scan tool that shows live data. also if the MAF sensor is having issues you can disconnect it and see if it starts then. or maybe it is a bad chassis grounding issue. need to check your ground points and straps.

 

Well I can't do live data as it won't run.. but i will check maf sensor later.

 

I'd be inclined to suspect something electrical. Start by verifying all your grounds.... And harness connectors.

 

well the temp sensor should at least give you the ambient temperature. unless it is way too cold where the truck is located.