Gear Indicator light,, 98 tahoe swap

[1991SSP]

My 98 tahoe has all the factory wiring still in place... when I set my new drivetrain in will I be able to re use the module that was unbolted from my stock 4L60E and retain my gear indicator light on the cluster?? I am going to leave the stock harness where it is and clip off all the plugs that are not needed, heatshrink the ends and tuck them away... I will be using a harness and PCM program from PSI for the new engine and trans

[Mickeymotormount]

Good question. You will definitely need the module so the new PCM knows what gear the transmission is in. Without a wiring diagram, it would be hard to figure out how to make it work.
Your new PCM may have a wire that goes to the dash to make it work. Not sure though.

[1991SSP]

I am pretty sure the gear indicator will have nothing to do with the new harness, the PSI harness is stand alone... I was just wondering about the module on the side of the trans wether or not it goes thru the old pcm or straight to the wiring in the dash harness

[tfi racing]

You will need he neutral/shift switch for the LS PCM to control the transmission,I beleive the truck shift indicator wires need to be spliced onto your new harness.Do a search here for eliminating the old black box PCM,its just not needed anymore.

[gta87305]

i just reworked a harness on an 02 and the small 4 pin plug is for the pcm and the other plug I think there was 6 wires was seperate because I removed it from my harness and I am gonna use my original gear indicator harness also. They ended up going to one of the other connectors that get cut off in the factory harness

[1991SSP]

The indicator light has nothing to do with my harness, the new harness I have is completely stand alone and has the trans harness with it as well, I just need to know how to get the gear indicator light in the dash to light up, I am still searching....