Well Guys, I am almost ready to get my truck back from its recent conversion (LQ4/4l80e in a 1990 kit truck) and I may have another snag. I have had my wiring guy also make my 4x4 wiring harness (who also did the engine harness). (I swapped in the 2004 transfercase along with the rest of the 2004 drivetrain.)

Here is the trouble. The harness that I finally recieved after a two month wait has connectors for Speed sensors for the front and rear driveshafts but my particular T-case had those speed sensor holes plugged up at the factory. They are not there. I am worrried that the harness was made for the wrong t-case as they used a wiring diagram for a 2004 K truck. Is there another wiring diagram for my application that someone could share with me? My T-case appears to be the NP1 according to a print out that somone here on this site was so kind to ave provided me with.

The donor was a 2004 K2500 HD built on Jan 22, 2004 Vin is 1GCHK29U94E253034.

Does anyone know why GM plugged the holes on this T-case and whether my harness will work minus speed sensors or what I need to do?

Many , Many thanks!

 

My guess is that the PCM is gonna want info from the speed sensors. Unplug the holes and install the speed sensors?

 

Most likly your guy built a harness for a autotrac tranfercase. witch autotrac wasn't offerd in your donner truck. also did he build the harness for a k truck a k1500, or a k2500 truck. and the harnees should still work.