I’m armed with a socket set and list of cars that use the same connector as my truck. Top priority goes to the Buicks, since they always seem to have louder horns than anything else. The Cobalt is a last resort since they have more wimpy horns.

I’m kinda thinking of getting 4 horns and two more connectors and wiring them up in parallel to the connectors already on the truck and have 4 horns for more loud.