I had a similar problem a few years back in my 99 Tahoe. Started up,
drove five feet into the middle of the road and died. Started fine an
hour later. Checked the voltage on the junk WallyMart battery and saw
the voltage was a little low, so I broke down and replaced it with an
Optima Red Top. Not a single problem since.
If that hadn't worked, it was beginning to make sense to bypass the
passlock system. There's a couple companies that sell modules to do
this at maybe $40 a pop? that are typically used for remote starter
I think the later year Passlock systems, not positive on the generation
number, didn't use the a resistor embedded in the key. It's working the
same way as those older systems, but it just checks for resistance in
another way. Maybe just with any key? That would make sense if only for
the fact that it's just trying to keep people from hotwiring it.