Hey everyone, I'm Rick Baran. I'm a retired sailor who owns a 2000 Z71 Tahoe.

As the title states, my tachometer, speedometer, and odometer have stopped working. My transmission will shift into/out-of Park, Reverse, Neutral, and 3rd. My transfer-case appears to shift normally as well(I have the electric switches on the lower dash to the right of the steering column).

Once in a while(maybe 1 in 25 starts) EVERYTHING will work normally for a few hundred feet up to an entire day's driving(25-30 miles).

Anyways, I have been researching on our interweb, and decided to replace the two Speed-Sensors on the transfer-case. That had no effect whatsoever. I also disconnected the battery and checked ALL fuses with no change.

I read that the VSSB(?) was located behind the glove-compartment. I cannot locate it behind the passenger's glove-compartment. I don't have a wiring-diagram nor do I have a component-location diagram, so I'm having difficulty proceeding any further in troubleshooting.

Do any of you have any ideas as to how I should proceed? I've read several forum-posts discussing the possibility of a bad Ignition-Switch. I've also read about the VSSB, which I take it is a sub-computer and not the big clunky heat-sinked box on my driver-side inner-fender?

I've also considered finding a 6.5 diesel and a 4L80 transmission and replacing my 325k mile 5.7 gas/4L60. Anyone wish to weigh-in on that option?