Description: S-series. 4.3l. Astro, Safari. 6 cylinder. All models. 5.7L. Silverado, sierra. 4.3l. Incl.Gaskets. Express, savana. 7.4l. Thoroughly tested for reliable, leak-resistant performance Uniform wall sections and smooth coolant-flow cavities for efficient operation Coated seals with a stainless steel spring for durability

Description: 4.3L, to block. 2003-14, to block. 1/2, 3/4 & 1 ton, 1996 new style, gas engine, 4.3, 5.0, 5.7L. May be made from fiber or a rubberized composite material
This GM Genuine Part is designed, engineered, and tested to rigorous standards and is backed by General Motors