I just have someone do this for me. It is way cleaner and easier. I always use www.johnscustomwiring.com now.
I have gotten several harnesses from other company's but theirs are by far the best and direct fit into any GMT400..
This was not my experience at all. I have ordered harnesses from several companies and his was by far the best.
Yes it was a couple weeks late but what do you expect in todays business climate..