New Old Stock (NOS) AC Delco Exhaust Gas Recirculation (EGR) Valve, Part Number 12323899 (also referred to as 12323899). This valve replaces GM OEM P/N 17084518 and is suitable for numerous Buick, Cadillac, Chevrolet, GMC, Oldsmobile, and Pontiac 5.7L V8 models from 1988 through 1995. Used to control emissions.
| Make | Model | Years Consolidated | Engine Size | Special Notes | Part Number | OEM Numbers |
| BUICK | All Models | 1988-1995 | 5.7L V8 (350cid) | Used with 5.7L TBI (Throttle Body Injection) V8 engines. | 12323899 | 17084518 |
| CADILLAC | Brougham | 1990-1992 | 5.7L V8 (350cid) | Used with 5.7L TBI (Throttle Body Injection) V8 engines. | 12323899 | 17084518 |
| CHEVROLET | Caprice, Corvette, Trucks (C/K/R/V Series, Blazer) | 1988-1995 | 5.7L V8 (350cid) | Used with 5.7L TBI V8 engines. Includes light and medium-duty trucks. | 12323899 | 17084518 |
| GMC | Trucks (C/K/R/V Series, Jimmy, Yukon) | 1988-1995 | 5.7L V8 (350cid) | Used with 5.7L TBI V8 engines. Includes light and medium-duty trucks. | 12323899 | 17084518 |
| OLDSMOBILE | Custom Cruiser | 1991-1992 | 5.7L V8 (350cid) | Used with 5.7L TBI V8 engines. | 12323899 | 17084518 |
| PONTIAC | Firebird | 1988-1992 | 5.7L V8 (350cid) | Used with 5.7L TBI V8 engines. | 12323899 | 17084518 |