allproroofing
New Member
Got a 1991 gmc k1500 gasser I bought with no motor , looking to swap in a n/a 6.2 from a 1992 c1500 I picked up a week later. My question is , do I have to just swap out the under-hood wiring harnesses , ecu , and dash cluster , or do I need all the wiring from the donor truck including all the in-cab stuff to be right? I want all my gauges and everything to work like stock application. Just means a lot more work to remove the dash off the donor if I need everything.