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New Old Stock (NOS) AC Delco Exhaust Gas Recirculation (EGR) Valve, Part Number 12323887 (also referred to as 12323887). This vacuum-operated valve replaces GM OEM P/N 17053530 and is suitable for numerous Buick, Chevrolet, GMC, Oldsmobile, and Pontiac models with various V6 and L4 engines from 1987 through 1995. Used to control emissions.
| Make | Model | Years Consolidated | Engine Size | Special Notes | Part Number | OEM Numbers |
| BUICK | Century, LeSabre, Regal | 1987-1992 | 3.8L V6 (231cid) | Vacuum-operated valve. Check casting number. | 12323887 | 17053530, 17083076 |
| CHEVROLET | Camaro, Caprice, Corvette, Lumina, Monte Carlo | 1987-1995 | 3.1L V6 (189cid), 3.8L V6 (231cid) | Vacuum-operated valve. Check casting number. | 12323887 | 17053530, 17083076 |
| GMC | Trucks (S/T Models, Safari Van) | 1987-1992 | 2.5L L4 (151cid), 4.3L V6 (262cid) | Vacuum-operated valve. Check casting number. | 12323887 | 17053530, 17083076 |
| OLDSMOBILE | Cutlass Ciera, Cutlass Supreme, Delta 88 | 1987-1992 | 3.8L V6 (231cid) | Vacuum-operated valve. Check casting number. | 12323887 | 17053530, 17083076 |
| PONTIAC | Firebird, Grand Prix, Sunbird | 1987-1995 | 3.1L V6 (189cid), 3.8L V6 (231cid) | Vacuum-operated valve. Check casting number. | 12323887 | 17053530, 17083076 |