4.8 / 5.3 / 6.0 CADILLAC ESCALADE 5.3/6.0 2002-2003 / CHEVROLET AVALANCHE 1500 5.3 2002-2003 / CHEVROLET EXPRESS 1500 5.3 2003 / EXPRESS 2500 4.8 5.3 6.0 2003 / EXPRESS 3500 6.0 2003 / CHEVROLET SILVERADO 1500 4.8 5.3 6.0 1999-2003 / SILVERADO 2500 5.3 6.0 1999-2003 / SILVERADO 3500 6.0 2001-2003 / CHEVROLET SUBURBAN 1500 5.3 2000-2003 / SUBURBAN 2500 6.0 2000-2003 / CHEVROLET TAHOE 4.8 5.3 2000-2003 / CHEVROLET TRAILBLAZER 5.3 2003 // GMC ENVOY 2003 5.3 / GMC SAVANA 1500 5.3 2003 / SAVANA 2500 4.8 5.3 6.0 2003 / SAVANA 3500 6.0 2003 / GMC SIERRA 1500 4.8 5.3 6.0 1999-2003 / SIERRA 2500 5.3 6.0 1999-2003 / SIERRA 3500 6.0 2001-2003 / GMC YUKON 4.8 5.3 6.0 2000-2003 / HUMMER H2 6.0 2003 // ISUZU ASCENDER 5.3 2003-2004 (Thermostat hole 2.05``)