The GM part no. for the 60G plug is 12563554. I bought a set in early 07 at my local Chevy store (now shuttered). Paid list price, about $75, i think. Finally installed this AUG, they work great. They do require changing the ends on the wiring. The 13G's i took out had 3/16" connectors. The 60G's had 1/4" ends. As i was repairing the entire harness on the bench, it was no problem to crimp new ends. When it starts to act up, the 6.5 in the "Canyonero" will get 60G's too.