Press and hold fuel tank switch?

[bennylava]

I'm hoping someone here can explain the difference between the two types of fuel tank switch. I bought a GM brand replacement switch, because the old one died. But it was so difficult to plug in, that I thought maybe I bought the wrong one.

Since they're so cheap, I went ahead and got a Dorman brand one and it fit great and works great.

I noticed that the GM is the press and hold style switch, while the Dorman has no such function. You just flip it one way or the other. What's the difference here? Did the seller perhaps ship me the wrong GM brand switch? Maybe my 87 truck isn't supposed to have that kind of switch, and that explains why it didn't fit the socket.

It looked like the pins lined up, but I couldn't get them to go in. Wasn't going to try and force it and break something. Thanks!