My Blazer is a 1988 Silverado blazer K5. the back window rolls up really slow and does not come up even. it is a bit tilted to the side leaving a small crack open on one side of the rear. Is there anything i can do about this besides buy a new window or take it in?? if so help me by posting me on a reply.

Not real familiar with the full size blazers. However, have you checked the regulator and tracks to make sure the glass is riding correctly??

Its the felt in the side channels rots out. Buy both new side channels and lube the drive gear assembly - all accessible with the main cover off the tail gate. My 89 Suburban did the same thing.