2015 Peterbilt 386 after market stereo install. 

The harness for kenworth and Peterbilt that works is for some Volkswagen cars

Metra makes a plug n play wire harness

can you put down here in the comments, what color were the main wires coming from the truck, like the power, ground, and accessories please

Thank you u did help me I’m installing mine in same truck

A wire coat hanger works good to get the radio out