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Looking for aftermarket parts to modify or upgrade your 2003 Chevrolet Silverado 3500 with thermostats? At Tunersports.com we carry a huge selection of the top name brand performance thermostat parts and accessories for your Silverado 3500.
Whether you have a 2003 Chevrolet Silverado 3500 in Base to LT trim we have you covered. We have 5 thermostats available parts to mod your Silverado 3500. All parts have free shipping to the Continental US 48 States.
 OUT OF STOCK 33329Gates 95-04 Buick Century V6-3.1L OE Type Thermostat - 195 Degree 2001-2005 Chevrolet Silverado 3500 Base 2001-2006 Chevrolet Silverado 3500 LS / LT $29.05 |
 OUT OF STOCK 33963Gates 04-06 Pontiac GTO / 03-06 GMC Envoy / 00-11 Chevrolet Suburban Thermostat 2001-2005 Chevrolet Silverado 3500 Base 2001-2006 Chevrolet Silverado 3500 LS / LT $31.25 |
 IN STOCK MMTS-CHV-01DHThe Mishimoto Chevrolet Duramax high temperature thermostats activate at a higher temperature than the OEM thermostats, making them the perfect solution for Duramax owners who live in colder climates, or have trouble reaching operating temperatures.Activating at a higher temperature means the thermo... Mishimoto 01-10 Chevy Duramax 2500 6.6L 185 & 191F Degrees Racing Thermostat 2001-2005 Chevrolet Silverado 3500 Base 2001-2006 Chevrolet Silverado 3500 LS / LT $97.26 SALE VIEW PRICE IN CART |
 IN STOCK MMTS-CHV-01DLThe Mishimoto Chevrolet Duramax low temperature thermostats activate at a lower temperature than the OEM thermostats, making them the perfect solution for Duramax owners who live in warmer climates, or use their trucks under heavy load or strenuous driving conditions.Activating at a lower temperatur... Mishimoto 01-10 Chevy Duramax 2500 6.6L 174 & 180F Degrees Racing Thermostat 2001-2005 Chevrolet Silverado 3500 Base 2001-2006 Chevrolet Silverado 3500 LS / LT $99.48 SALE VIEW PRICE IN CART |
 IN STOCK MMTS-VET-97LChevrolet LSX engines achieve impressive power in both naturally aspirated and forced-induction forms.With added power comes increased heat that necessitates a reliable and efficient cooling system.Protect your vehicle from overheating by upgrading to the Mishimoto racing thermostat.This thermostat ... Mishimoto Chevrolet/GMC LSX Racing Thermostat 2001-2005 Chevrolet Silverado 3500 Base 2001-2006 Chevrolet Silverado 3500 LS / LT $73.73 SALE VIEW PRICE IN CART |