I want to replace my front solid window with a sliding window in my Leer Knight topper, dealer must have serial number to order, where do I find the serial number ??

 

Do you mean VIN number ??

It should be on your left door post

It is also pretty much on all registration paper work

 

I think you mean the topper serial number?

There should be an identification plate somewhere on the topper with the Leer name, logo, and serial number.

It has been awhile, but the last one I looked at had the identification plate glued or riveted to the left rear of the topper by where the tailgate and rear hatch meet.

Depending on how old the topper is and how it was used, the identification plate may no longer be attached and could have fallen off over the years of use.