FOR 1996-2000 CHEVROLET TAHOE 5.7L 350CID V8 OHV, (16 VALVE), VIN CODE "R" - VORTEC. FOR 1996-1999 GMC C1500 SUBURBAN 5.7L 350CID V8 OHV, (16 VALVE), VIN CODE "R" - VORTEC. FOR 1996-1999 GMC C1500 5.7L 350CID V8 OHV, (16 VALVE), VIN CODE "R" - VORTEC.