[ravingpyro]

I've already posted on chevytalk and am not getting a response.
I hav an '88 s10 blazer 4.3L 4x4 which is giving me a VSS code. Now usually for this year the sensor is located near the tailshaft of the transfercase/tranny. But I heard on the 4x4s they are under the dash near the guage cluster. Is anyone positive where it is located?

 

[biggnome]

The actually pickup sensor is on the tailshaft housing on the transfer case. The name of the box you're thinking of escapes my mind at the moment. But a quick check on the sensor, should have somewhere in the neighborhood of 800 to 1200 ohms resistance. Should produce atleast 100mV spinning the driveshaft.