1991 CHEVROLET S10/S15/SONOMA - Engine Assembly 6-173 2.8L, VIN "R", 60 Months Warranty. Free Shipping, 1 Month Return Policy. Used (Original Equipment Manufacturer). Engine Run, Tested and covered under 5 Years Warranty. All of our Engines are Shipped as Complete Assemblies from Top Valve Cover to Exhaust Manifold, Including: Intake and Exhaust Manifold; Valve Cover; Cylinder Heads and Block; Timing Belt Cover. PLEASE NOTE: Cable harness, any sensors, hoses and bolt-on accessories will not be included and never covered under warranty if shipped with the engine.