What size are the axle U bolts on a 2002 GMC Sierra 2WD also what is the size of the leaf spring center pin that aligns the leaf pack on the axle?

For a 2002 GMC Sierra 2WD, the axle U-bolts are typically 9/16 inch in diameter. The leaf spring center pin that aligns the leaf pack on the axle is usually 3/8 inch in diameter. However, it's always a good idea to verify these sizes with a repair manual or parts supplier to ensure accuracy, as variations can occur depending on specific configurations.