T660 inner door panel

[JimT]

From my experience, the PACCAR dealer knows and can look it up in their compuers, but doesn't want to give you that info so you are stuck buying it from them. Run into this with my Pete all the time. Finally found a Volvo/Pete dealer that will give me part numbers. It's how I found out that a lot of the parts on my 2012 587 are the same as some 579's. For some reason the 587 doesn't have a lot of aftermarket support, but the 579 has tons. Good luck. Eventually you'll find someone willing to give you that info. IDK if the same holds true for KW, but most of the PACCAR branded parts for my Pete are just rebranded generic parts from other OEM's. Like the PACCAR airbags are just Firestone with a different part number