Did you unhook the battery?

 

Yes I thought for sure that would fix it, but the same thing happens..

 

When doing the security relearn you have to keep the doors shut the entire time, did you do this?

I don't know anything else, I'm a noobie when it comes to this stuff. Sorry.

 

Oops! I'll try it with the doors shut lol. Thanks.

 

check the passlock wiring. if you just disconnected the remote start the wiring could be broken.

 

In that case I don't think the truck would even start.

 

as funny as this sounds check your relays switch your fuel pump relay with yhour horn relay annd see if it works, or just switch the fuel pump relay with one that fits, try it, i know casue my 00 sierra did the exact same thing, i checked my relays and did it never happendd again

 

I can hear the pump running and it stops about a second or 2 after the truck kills itself. Ill mess with it some more tomorrow afternoon.

 

you tried to command the fuel pump on with HPtuners?
Im just thinkin out loud...

Could be the Ignition? I know i helped my buddys dad replace the Ignition switch in his 01 cause it was doin the same thing.

My truck did this when i did the 80E swap but i had the wrong VIN in the PCM..

 

Seems to be the passlock since I re-enabled it last weekend. It started right up this morning, but when I went to come home from work, same sh*t. I screwed with it for 15 minutes and got so pissed that I was pounding on the steering column as hard as I could and it started up. I pulled off the knee panel and clipped the yellow passlock wire while the truck was running.

I found this trick on an Impala forum with the same issues. Now it will run fine until I disconnect the battery, just the security light will stay on.

For a permanent fix and to turn off the security light, I need to take a voltmeter to the passlock wires and measure the resistance (if I can get the system to operate properly!) Then I will buy the appropriate resistor and wire it in and be done with it forever. I will keep you guys posted.