The post listing the positions is correct!! I figured it out by chasing them down and logic. I did try the dealership where I bought the truck, they called it old and out of the system, parts guy at least tried service manager never even looked in computer.
Unfortunately I must have damaged the abs module as it is now leaking out of the rubber caps at the bottom, $1000 part, adding up other upcoming repairs it is getting traded in. Since Chevy decided to get rid of all my local dealerships, except for the one who would not help me I will be searching out other brands. My chevy served me well for 11 years!