GM has issued a service update, bulletin number N232409000, for certain units of the 2023 Chevy Colorado and 2023 GMC Canyon that may have a condition in which the engine wiring harness chafes ...

GM has issued a Customer Satisfaction Program for certain units of the 2023 Chevy Silverado 1500 built with the incorrect wiring harness and missing circuits.

The harnesses are built to order for GM LT, LS, and '96-up Vortec engines. Current can modify an existing wiring harness to a standalone system, or build a complete harness to fit the engine ...

When you are doing a build with the LS family of GM engines, the idea is to end up with a simplified engine harness that only needs a minimum number of inputs/outputs for a standalone swap.