I've been using goo-net-exchange.Com To try and find a Suzuki carry to buy. how do I know if it has a diff lock or not? It doesn't put that on the list of options that are available to be checked off. My ideal truck is a 2001 with a dump, power steering, ac, and diff lock
'03-'15 There is a button for diff. lock. It is between the seats, behind the gear shift lever. Not sure on the '99-'02 but guessing the same. If you want to go new (2015-16) we could get one.
Goonet is an excellent resource. I've used it unlimited times over the years for referencing items through the pics. With that being said, some ads have one pic, some have 5 and others have 20. Like woodhe mentioned, it's a square button between the seats. You'll really only be able to see it if they have a good pic in that area.