New Old Stock (NOS) AC Delco Exhaust Gas Recirculation (EGR) Valve, Part Number 12323900 (also referred to as 12323900). This valve replaces GM OEM P/N 17083167 and is suitable for numerous L4, V6, and V8 Buick, Chevrolet, GMC, Oldsmobile, and Pontiac models from 1986 through 1992. Used to control emissions.
| Make | Model | Years Consolidated | Engine Size | Special Notes | Part Number | OEM Numbers |
| BUICK | All Models | 1986-1992 | 3.8L V6 (231cid), 5.0L V8 (307cid) | Used with various V6/V8 engines. | 12323900 | 17082357, 17083167 |
| CHEVROLET | Camaro, Caprice, Corvette, S10 | 1986-1992 | 2.5L L4 (151cid), 5.0L V8 (305cid) | Used with various L4/V8 engines. | 12323900 | 17082357, 17083167 |
| GMC | Trucks (S15/Sonoma) | 1986-1992 | 2.5L L4 (151cid) | Used with 2.5L L4 engine. | 12323900 | 17082357, 17083167 |
| OLDSMOBILE | All Models | 1986-1992 | 5.0L V8 (307cid) | Used with 5.0L V8 engine. | 12323900 | 17082357, 17083167 |
| PONTIAC | Firebird, Grand Prix | 1986-1992 | 5.0L V8 (305cid) | Used with 5.0L V8 engine. | 12323900 | 17082357, 17083167 |