What size is the distributor o ring on a 1997 Chevy blazer 4.3?

The distributor O-ring for a 1997 Chevy Blazer with a 4.3L engine typically has an inner diameter of 1.5 inches and an outer diameter of about 1.8 inches. It's essential to check the specific part number or consult a repair manual for precise dimensions, as variations can occur. Always ensure you use a high-quality replacement for proper sealing.