02 Tahoe won't start

[jnskijnski]

Hello all. Please help if you have the time.
Just had the transmission rebuilt in my 02 Tahoe.
While at the tranny shop, passlock reset had to be done.
Picked up today and shut off and started numerous times without any trouble.
Went out a little while later to run to the store and it won't crank.
No security light blinking this time.
All electrical works, interior lights, headlamps, radio, etc.
Towed to repair shop, started up every time. Brought it home, parked in driveway. started it up about ten times just to be sure , no problems.
went back out an hour later, same thing, wont start, all electrical dash components, etc work, just no crank.
towed to the shop again, you guessed it. started right up. Took it for a ride and they tried to duplicate what I did..drive for 20 minutes, park it at the shop, start and shut off numerous times, let it sit for a while, still starts.
It sat at the shop for the long holiday weekend, started right up this morning. Guaranteed if I go get it and bring it home, it wont start tomorrow morning, and I really would rather not have it towed every other day.
any suggestions, or similar stories with a solution?

 

[BOSS]

That's an interesting situation..I was going to say first check the fuel pump but it really sounds electrical. Sounds like they are doing the passlock programming again when they get it back and send you on your way later.

B

 

[jnskijnski]

That's an interesting situation..I was going to say first check the fuel pump but it really sounds electrical. Sounds like they are doing the passlock programming again when they get it back and send you on your way later.

B

The repair shop is owned by a family member, so I doubt that is what is happening. The security light is not blinking when it won't start. It did while at the tranny shop, and passlock reset, but not now. It's acting like it, but passlock I thought the truck would start and stop right away, locking out the fuel pump. My issue is nothing cranking and no security light.
perplexing to say the least.