Which point is 1 on your 1989 gmc 2.5?

Answer 1

If you mean which point on the distributor cap, the easiest way to find it is to set number one piston at top dead center and see where the rotor is pointing in relation to the distributor cap - the rotor should be pointing to the location of number one park plug wire firing point - this is where the number one spark plug wire should be connected. The rest of the wires are connected according to their firing order.