wiper motor interchange?

[Swims350]

anyone know what all year wiper motors would fit my 88 k1500 with pulse?

local junkyard has some for $25 but they are from 91 and up or at least that's what they pull up for fitment is 91+

 

[Swims350]

according to rockauto they all interchange, from 88-98 same part numbers so that's good.

Mine's shot now you can hear it but it won't move. it worked fine before.