[LDO]

Sorry for hijacking your thread Gass but it was such a coincidence that I was working on this myself and none of the older threads really helped much so I couldn't resist.

It seems alot of the earlier 80s trucks could have been wired for it but you will have to check. When you remove the module, you can tell if you have a 'female' receptacle for that 7th pin and that will tell you if you are wired. For my 85 Silverado, it was. I suppose it wouldn't take too much to wire it and make it look stock if you had a wiring diagram.

Best of luck to all. I'm hitting the junkyard this weekend and will try to scoop up as many of these units as I can and plan to send some out. When I was younger, I would prolly have pulled these out and trashed them, now that I am older (wiser?) I want the buzzer! LOL