Which fuse is for the horn and radio in a 1988 Chevy Celebrity the cover with chart is missing?
The fuse block itself is labeled as to what each fuse is for, however most fuses do double duty for 2 or more items not listed on the block. If you reach up at the back of the block there is a release lever that allows the fuse block to swing down for easier viewing. For those items not marked I often wind up taking out each fuse one at a time and determine which one is blown and replace it. Replace fuses with a fuse of the proper value.
If you have a Chilton manual it has a description of the fuse block in it.
The location of the EGR valve on a 1987 to 1989 Chevy Celebrity depends on which engine the car has. If the car has the 2.8L V6 the EGR valve mounts to the plenum near the throttle body. If the car has the 2.5L 4 cylinder engine the EGR valve mounts in the center of the intake manifold near the valve cover.