Hey Yall, first post here after lurking for a while.

I'm having a weird issue with my k1500.

It's been having a rough idle as of late, and also when creeping in reverse or slow speeds the engine will quit. It always starts up fine and runs just cine. I have replaced thr tps and iac and it does have new rotor cap with plugs/wires etc.

My guess is the ICM?

 

Have you checked your fuel system? How long has it been since you changed your inline fuel filter?

Have you disconnected the battery and let it sit for a couple of minutes to let the puter reset? That does not always work but it does not cost anything.

If it worked I attached a PDF on troubleshooting TBI units it might also help

 

Rich.
Truck has a new fuel filter so it shouldn't be that. I will reset the computer to see if that helps.
-Linny