Looking for aftermarket parts to modify or upgrade your 1999 GMC Sierra 1500 with thermostats? At Tunersports.com we carry a huge selection of the top name brand performance thermostat parts and accessories for your Sierra 1500.
Whether you have a 1999 GMC Sierra 1500 in SL to SLT trim we have you covered. We have 2 thermostats available to mod your Sierra 1500. All parts have free shipping to the Continental US 48 States.
 OUT OF STOCK 33963Gates 04-06 Pontiac GTO / 03-06 GMC Envoy / 00-11 Chevrolet Suburban Thermostat 1999-2003 GMC Sierra 1500 SL 1999-2006 GMC Sierra 1500 SLE / SLT $31.25 |
 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 1999-2003 GMC Sierra 1500 SL 1999-2006 GMC Sierra 1500 SLE / SLT $73.73 |