I have a stock GM fuel pump that came out of my 04 1/2 ton crew cab GMC Sierra. Based on the information I found, it appears to fit 1/2 ton and 3/4 ton Chevrolet and GMC trucks, Suburban, H2, Sierra, Silverado, and Avalanche. This pump has about 31k miles on it and was removed in favor of a high performance pump. There are two different styles of pumps for these models so if you have any questions about the compatibility please refer to the picture.