These models came stock with a release button below the cigarette lighter. If you look directly to the right of the radio there should be a button to push that will release the glass and then once its open, your tailgate should open once you do it manually.
Hope this helps you
take it to a transmission shop
how to in stall a Quarter Window in a 98 Chevy blazer
You will need to remove the inside door panel of your Chevrolet Blazer. Remove the window retaining clips. Put the window back into the window track. Tighten the window retaining clips.
How do you install a 1994 Chevy blazer electric window? In:http://wiki.answers.com/Q/FAQ/603[Edit categories]
1998 Chevrolet Blazer did not have vent windows.
A little grease.
by jumping wires across
You can replace the rear vent window on a 2001 Chevy Blazer LS 4x4, 2 door with Direct Fit Power Window Regulators.
No. IIRC, all models of the Blazer from 1995 - 2005 had either a single door which was hinged at the top and raised upwards, or a split door (which are extremely rare) - not a drop down tailgate like what a pickup has.
Remove the drivers side inside door panel. Remove the retaining clips from the window track. Place the new window in the window track and tighten the retaining clips.
A blown fuse could be the reason the window will not go down on your 1988 Chevy Blazer. Another possibility is that the switch is worn out or has a loose, broken, or corroded wire.
Best to leave this to a professional.