c1500 x-cab wiring ?

[rockmo 10+ year member]

hey all, i am brand new to this site. i have a 91 gmc ext cab, my question is i am running wiring for my sub amps, and was wondering if anyone knows if there is a predrilled hole i can go thru? would be nice not to have to drill a hole. i am running 4 gauge wire. thanks for any help.

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[Matt C 10+ year member]

Guessing your talking about going through the firewall? If you are there really isn't a hole drilled, unless you wanna sneak it through a grommet with the hood cable or something. 99% of the time it's easier to just drill a hole rather then go through existing grommets. That's my opinion though.