How do you raise and lower the back seat in a 1991 Chevey 1500 Silverado?

Answer 1

Under the back seat of the passenger side in the front corner there should be a pull release handle to lift the seat. If you don't see it, you may have to undo the Velcro strip to see it. After you find it, pull on release handle to lift the seat.

Note: Still if you don't see the pull release handle, then there is a possibility the handle is broken off, in that case just feel around under the front corner or you may see a hole in the Velcro where the handle went threw. After locating were the handle may had broken off, get a pair of vice grips to latch onto where the handle was broken off from and pull on the release rod or cable.