Valve Details It is an original spare part number from General Motors (GM), which is a Secondary Air Injection Check Valve. This valve is also known as the Smog Pump Check Valve, and its function is to prevent hot exhaust gases from returning to the air pump. Here are the most important details and information about this part: 1. Supersession & Interchange Approved GM Replacement Part Number: This number was later replaced by the modern number 12565503. ACDelco Part Number: Matches number 214-419. 2. Vehicle Compatibility This valve has been widely used in General Motors large engines and high-performance engines (such as 5.7L and 7.4L V8 engines). The most prominent compatible vehicles include: Chevrolet Corvette: Models from C4 to C5 (between the years 1985–2004). Chevrolet Camaro and Pontiac Firebird: With 3.8L V6 and 5.7L V8 engines (between the years 1993–2002). GM Trucks/SUVs: Such as Suburban and C20 models (between the years 1985–2000).