Ever pull a gas pedal wiring harness and TAC module?

[bigmoe]

My 5.3 LS engine donor was a low mileage '08 Tahoe. I bought the motor, wiring harness and gas pedal from an acquaintance who had it pulled and then decided to go with a 6.0 that came along. (he works in the auto insurance industry and sees all the good stuff that comes along) I got a gas pedal but he told me he never got the harness and TAC module. My local wrecker has an '08 truck. The other day I was there and didn't have much time but took a look. I followed the wire from the pedal up and left to WAY up under the dash. There was a short branch to the brake switch. I couldn't find where it came through the firewall when I looked under the hood nor could I see a little box. I've since been told the module is supposed to be behind the battery. I need to go out there and give it another try. Has anyone ever removed a gas pedal wiring harness from an '08? Should I grab the brake switch? Any idea where it comes through the firewall?