how to tell what engine it has.open drivers door(right side door).fold seat back forward if
possible.look under drivers seat belt where it
disappears into the trim.the silver plate that
should be there will tell you if its an a15 or an a12.it'll also tell you if it's a 4.1 or 4.6 diff ratio.
just look for h*41 or h*46.the number is the diff ratio.if you can't find a plate there,look under the drivers seat.there might be a flap in
the carpet,& under this flap will be the silver plate.this will mean it's an urvan,& probably
have a z20 or z24.it'll still have a h190,but the
axles will be the large variety.either a 4.1 or a 4.3.