Retail Tahoe Wiring

billyfromhill

Registered Member
I've been asked to upfit a 2018 retail Tahoe. While looking over the vehicle, I noticed that the underhood fuse block has positions for the 4 upfitter relays along with their associated 30A fuses, and the two upfitter rely fuses that control if the relays are B+ or run/crank.

Does anybody know if the wiring is run up to the center console? If not, is it possible to run my own wires from the fuse box through the firewall and into the cabin? I would find it hard to believe that all these pre-wires are run in the retail Tahoe.

https://www.gmupfitter.com/files/media/photo/897/2018-Tahoe-4x4-Special-Service-5W4_12-14-17.pdf
See page 35.
 

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