Problem with a 561R

Okay, so now that I have that figured out.. What does use a 556U?  Would a Grand Prix GTP use one? Because the company I get it from (Keystone) sent me a 556U first, saying it was right.  Now they're saying it's a 555G.   I'm just trying to figure out where they dropped the ball.

All right guys, I'm having another little problem with the 561R, and the 555G.   Again, the vehicle is a 2001 Pontiac Grand Prix GT.  The problem that we're having now is that the Status output LED won't light up on the 555G.  The Status Output Wire no the 561R is Yellow in color, and on the 555G the wire that goes to that is Blue, or I'm assuming.  The mechanic said that he remembers reading somewhere that there's a way to make the yellow wire negative, instead of positive, but we don't know how to do that.  Unless someone else has another idea why it wouldn't go into learning mode, I'm all ears.

Thanks for the time.

it's amazing how simple things go when you read the instructions properly, isnt it?

dont let this one experience taint you... try a few more and read and then re-read the wiring instructions to make sure you are hooking it up correctly... they really are quite simple once you get the hang of it and get your confidence built up......