How to replace rusted off body mount bolts on 94 chevy truck

the calipers are in two sections
one section bolts onto the stub axle with 2 bolts and at the top of that section will be 2 bolts ( shafts) that are bolted to that mounting bracket
those bolts allow the caliper to slide so that the caliper can self center for equal pressure on each disc pad
there is normally a small rubber seal ( accordion shape) between the caliper body and the mounting bracket to keep dirt and water out but these fail and the slide section rusts onto the shafts
removing those bolts will be difficult as they will be rusted the full length of the slide but if you want the brakes to work properly it has to be done

Use the dimensions from one of the other motor mounts to find a replacement.

yep,had one like that ,have to support the engine and trans
with a bar and chains or whatever ,from the top and the subframe
comes out from under.not too bad ,the steering rack bolts are the
hardest thing,couple of motor mount bolts and the corner body
to frame mounts

take it to a welding shop or a body shop,, it needs a plate welded

Only thing left now is to cut them off with a torch, chisel them off or, use a small cut-off wheel.

you must pull the door pannel, with the window up you will see 2 bolts on the inside remove the latch rod first then the bolts !!

could be upper control arm bolt but also could be body mount bolt where the body mounts to the chassis

1. Disconnect negative battery cable and remove coolant reservoir.
2. Remove serpentine belt. Refer to Drive Belts, Mounts, Brackets and Accessories / Drive Belt. See: Drive Belt\Service and Repair
3. Remove two generator bolts.
4. Remove power steering pump and position aside.
5. Remove tensioner bolts and tensioner.
6. Reverse procedure to install, Torquing tensioner bolts to 37 ft. lbs.

some are 7/16 and some are 3/8 amd some are torx

replace mount these are common failure item let me know if you need details as to how to replace it