An LS engine swap is a no-brainer when it comes to adding some affordable horsepower to a project car, but any swap comes with its share of headaches, including wiring. That's where TSP's engine and transmission wiring harness comes in. It is designed for engines from '97 - '04 LS1 and LS6 Corvettes and '99-'06 drive-by-cable GM trucks with 4L60E transmissions.