1999 GMC 3/4 ton ol pan
I have a 1999 GMC 3/4 ton that won’t start. I changed the plugs, wires and
fuel filter. Then it started. There is something on the bottom of the oil pan that
is attached to something in the vehicle by two wires. The wires go off to a
harness and then off to something. Can you tell me what it is?