Removal (4.3L Commercial Van, 2WD Jimmy & Sonoma, 2WD "S" Series Pickup)
WARNING: This page does not describe the selected car, but rather 55 other vehicles, including the 1999 Oldsmobile Bravada, 1999 GMC Yukon, 1999 GMC Suburban, 1999 GMC Sonoma, and 1999 GMC Sierra. However, it is still accessible from the selected car via links, so may be relevant.
Release fuel system pressure. See FUEL PRESSURE RELEASE . Disconnect battery. Remove engine from vehicle. See ENGINE (4.3L) removal and installation procedure. Remove oil pan bolts from engine, and remove oil pan.