Chevrolet Repair Questions? Ask a Chevy Mechanic for Answers ASAP
I am sending some schematics that should help you.There is a splice in the main harness for your trailer,be sure & check the voltage in front of the splice.
Tail/Stoplamp harness, approx. 6.5 cm (2.5 in) from trailer harness breakout, towards RH taillamp