scotch
+1y
Yep, one is a 4 terminal connecter and one with a 5. You need the correct combo switch housing, or the switches themselves, to match the harness in your truck. The factory manual shows one style for carbureted trucks and another for injected. But somebody on the forum had a truck that didn't follow that.
Which switch do you need? 4 pin or 5? Here is a thread showing the difference: