On my 95 Chevy 2500 which wire under the dash on the brake switch is the one that I need to tap in to? I am pretty sure that 95's don't have any kind of harness, do they?

The white wire under the sreering column is the brake switch feed wire. Under the hood below the brake booster you will find a blue and orange wire taped up together. The orange wire is the 12 volt power for the back and the blue wire is for the brake control output. In the back up in the frame on the drivers side you will find the blue and orange wire again and just need to hook these up to you plug. Also go to the fuse panal under the hood and you will find 2 studs..one for the 12v power and one for the brake control power feed. Hope this helps

Sorry add on to this post. I recently purchased a 95 GMC suburban 2500 and have the same questions. I found the wires in the back and under the hood. Is the Suburban set up the same way as you described above for the brake wires?

Thanks.

95 GMC Suburban 2500 6.5 TD.

Yes

sorry to add to this post also...... but is this the same on a 96 1/2 ton also....... any help would be nice thanks in advance
tony :beerchug:

Yes up to 2000 year model.

To clarify for everyone.. it is the same for ALL GM C/K trucks/subs/tahoes from '88-'99. That's what nice about GM, they don't change basic stuff every year.