ReplacementRadios, one of the largest factory audio/video websites, has branched out!! If you?ve been to our site, you know we have a HUGE selection of OEM radios and compatible accessories. Now we?re offering a few select products here too. Same great ReplacementRadios quality.....in a new location. DETAILS These plugs are intended for use with one of the OEM semi-truck/tractor radios we have listed (item 391693093994, 391692751341, 391674418712, 372061497100 or 371790512967) or one of the radio part numbers that appear in those ads. If you do not have these plugs in your vehicle and are purchasing one of those radios, you will need these. They are also known to be the plugs used for the following radios, but please check the ** note below: 12213660 -- am/fm/cassette -- (Freightliner, Massey Ferguson, etc) 12213670 -- am/fm/cd -- (Freightliner, Massey Ferguson, etc) 12215835 -- am/fm -- (Navistar, Massey Ferguson, Kenworth, etc) 12215845 -- am/fm/cassette -- (Navistar, Massey Ferguson, Kenworth, etc) 12215865 -- am/fm/cd -- (Navistar, Massey Ferguson, Kenworth, etc) 12215880 -- am/fm -- (Peterbilt, Kenworth, etc) 12215900 -- am/fm/cassette -- (Peterbilt, Kenworth, etc) 12216310 -- am/fm/cassette -- (GM, Hummer, etc) 12216320 -- am/fm/cassette -- (GM, Hummer, etc) 12217670 -- am/fm/cd 12244285 -- am/fm/cassette -- (Mack, etc) 12244295 -- am/fm/cd radio (Mack, etc) 20928235 -- am/fm/cassette -- (Volvo, etc) 20928236 -- am/fm/cassette -- (Volvo, etc) 21003880 -- am/fm -- (International, etc) 21003882 -- am/fm/cassette -- (International, etc) 21225718 -- am/fm/cd -- (Volvo, etc) 21225721 -- am/fm/cd -- (Volvo, etc) 21356887 -- am/fm -- (Volvo, etc) 21197288 -- am/fm/cd -- (Volvo, etc) 28117802 -- am/fm/cd -- (Mack, etc) 28117803 -- am/fm/cass -- (Volvo, etc) 28132530 -- am/fm/cd -- (Volvo, etc) 28134905 -- am/fm/cassette -- (Volvo, etc) 28161508 -- am/fm/cd -- (Volvo, etc) 28161510 -- am/fm/cd -- (Volvo, etc) 28317504 -- am/fm -- (Volvo, etc) 325061A2 -- am/fm/cassette -- (New Holland, Case, etc) 366631A2 -- am/fm -- (New Holland, Case, etc) 36MT522M2 -- am/fm/cassette -- (Mack, etc) 36MT522M4 -- am/fm/cd -- (Mack, etc) 36MT539M -- am/fm/cd -- (Mack, etc) 86998223 -- am/fm/cd -- (New Holland, Case, etc) We cannot guarantee they will work with any other radio besides the ones referenced here. Returns are not accepted so, if you're taking a chance on these for something else, you do so knowing this. Connection of these wires will be required in your vehicle. This may involve cutting and splicing. These plugs will have the aftermarket standard wire colors, so wire assignment is relatively easy to identify on the plug side. (See the standard color chart in the pictures attached to this listing.) Identification of vehicle specific wires, as well as wires on the vehicle side will be up to you. **Please note that some radios had the constant and switched power wires reversed. If yours is one of them, you will experience preset and clock memory loss. (And you may have to enter the theft code each time you start the vehicle.) If any of this happens, you merely need to switch those two wires (usually they're red and yellow) where you joined this plug to your wiring. (ie - Redo those two splices, switching the wires.) Appearance of the plugs may vary. In some cases one is brown. In others they are all black. In some cases the two plugs are joined together. In other cases they are separate. Pictures of them locked together and as separate plugs appear in this ad. You will receive whichever one we happen to have been sent by our supplier. In other words, you are NOT receiving two different sets of plugs. This listing is for enough to do one radio. Whether the plugs are locked together (joined) or not has no impact on your ability to use them for any of the radios listed here. SHIPPING We will update this system with the tracking number. They will send you an email if you have your preferences set accordingly. The default method is First Class. If you want Priority Mail, that is an option. You just need to select it during check-out.