Valve Seat
WARNING: This page is about a different car, the 2003 GMC Sierra, 2003 GMC Cab & Chassis Sierra, 2003 Chevrolet Silverado, and 2003 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
No replacement procedure is available from manufacturer. Valve seats are induction hardened. Excessive removal of material may damage valve seat. Measure seat width and runout. See CYLINDER HEAD table under ENGINE SPECIFICATIONS.