I just found this list in Wikipedia on G body cars. They have a good source of info on these G body cars. The also have good info on the S-10 trucks and references the use of g body parts in them.
Buick Grand National (1982, 1984-1987) Buick Regal (1982–1987) Chevrolet El Camino (1982–1987) note: ~200 unsold 1987s reportedly sold as 1988s; unclear if this included GMC Caballeros as well Chevrolet Malibu (1982–1983) Chevrolet Monte Carlo (1982–1988) GMC Caballero (1982–1987) Oldsmobile Cutlass Supreme (1982–1988) note: 1988 model known as Cutlass Supreme Classic Oldsmobile Cutlass Calais (1982–1985) Oldsmobile Cutlass Cruiser (1982–1984) Oldsmobile Cutlass Salon (1986–1987) Pontiac Bonneville (1984–1986) Pontiac Grand Prix (1982–1987) Pontiac Grand LeMans (1982–1983)
What years of the S-10 fit into your crossmember? Gen. 1 and 2 or just Gen. 1?