1999 GMC Sierra Thermostats & Parts
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iD Select®Engine Coolant ThermostatGMC Sierra 1999, Engine Coolant Thermostat by iD Select®. Swap out your worn-out or malfunctioning part with this top-notch product from iD Select. It’s built to OEM specifications to offer the same fit, form, and function as your...Direct OEM replacement for your malfunctioning partMade to deliver the ultimate in quality, reliability, and value$5.70 - $36.19 - MotoRad®Engine Coolant ThermostatGMC Sierra 1999, Engine Coolant Thermostat by MotoRad®. State-of-the-art equipment, strict quality control, and functional testing to each thermostat ensure customers that they can trust the high-quality product used in their vehicle....Offer precise pressure controlEnsure the proper fit$6.49 - $18.21
- TRQ®Engine Coolant Thermostat Housing AssemblyGMC Sierra 1999, Engine Coolant Thermostat Housing Assembly by TRQ®. Rely on the TRQ engine coolant thermostat housing assembly to help bring down damaging hot engine temperatures and prevent overheating. Made to OEM specifications for...Intended to bring your vehicle back to its original gloryBudget-friendly alternative to the OEM part$31.30 - $45.07$32.95 - $46.95Save up to 5%
- MotoRad®Engine Coolant Thermostat and Housing AssemblyGMC Sierra 1999, Engine Coolant Thermostat and Housing Assembly by MotoRad®. State-of-the-art equipment, strict quality control, and functional testing to each thermostat ensure customers that they can trust the high quality product...Offer precise pressure controlEnsure the proper fit$15.71 - $54.51
- ACDelco®GM Original Equipment™ Engine Coolant Standard ThermostatGMC Sierra 4.3L 1999, GM Original Equipment™ Engine Coolant Standard Thermostat by ACDelco®. Flange Diameter: 2.125". Temperature: 197F. Designed utilizing the latest technology, this product by ACDelco features premium quality and...Designed to deliver trouble-free, consistent performanceRight for your vehicle and lifestyle$32.98
- ACDelco®Engine Coolant ThermostatGMC Sierra 4.8L / 5.3L / 6.0L 1999, Engine Coolant Thermostat by ACDelco®. W/ Gskt. 187 Degrees Engine Coolant Thermostat with Gasket. ACDelco Professional Engine Coolant Thermostats control the flow of coolant through your vehicle's...Controls the flow of coolant through the radiator to help your vehicle's engine reach and maintain its optimal operating temperatureProfessional, premium aftermarket replacement$25.40
- Gates®Premium Engine Coolant ThermostatGMC Sierra 4.3L 1999, Premium Engine Coolant Thermostat by Gates®. With Seal. Depth from Flange: 1.45". Height from Flange: 0.87". Temperature: 195F. If you want to keep your vehicle safe on the road for many years to come, go with this...Great design and functionMade from sturdy materials$11.73
- Gates®OE Type Engine Coolant ThermostatGMC Sierra 4.3L 1999, OE Type Engine Coolant Thermostat by Gates®. With Seal. Depth from Flange: 1.52". Height from Flange: 0.8". Temperature: 198F. If you want to keep your vehicle safe on the road for many years to come, go with this...Map Controlled - Bolt-on solution with included sensor that links to the engine control unitSame easy installation as standard ITH$28.57
- MotoRad®Fail Safe™ Series ThermostatGMC Sierra 1999, Fail Safe™ Series Thermostat by MotoRad®. Fail-Safe Thermostats offer premium, patented technology for superior protection over any thermostat on the market. Only Fail-Safe is designed to lock in the open position...$10.15 - $14.97
- Gates®Engine Coolant Thermostat with HousingGMC Sierra 4.8L / 5.3L / 6.0L 1999, Engine Coolant Thermostat with Housing by Gates®. Temperature: 187F. If you want to keep your vehicle safe on the road for many years to come, go with this Gates product. Developed with the utmost...Provides adaptive, on-demand engine coolingAllows ECU to regulate engine temperatures$25.03 - $53.09
- MotoRad®High-Flow™ Series Thermostat with SealGMC Sierra 4.3L 1999, High-Flow™ Series Thermostat with Seal by MotoRad®. State-of-the-art equipment, strict quality control, and functional testing to each thermostat ensure customers that they can trust the high quality product used...$6.48 - $7.03
- MotoRad®UltraStat™ Series Thermostat with SealGMC Sierra 1999, UltraStat™ Series Thermostat with Seal by MotoRad®. The new MotoRad UltraStat® thermostats are an innovative line offering many features and benefits over the original equipment. Heavy gauge stainless steel...$11.56 - $13.62
- Gates®Heavy Duty Engine Coolant ThermostatGMC Sierra 4.8L / 5.3L / 6.0L 1999, Heavy Duty Engine Coolant Thermostat by Gates®. Without Housing and with Seal. Depth from Flange: 1.89". Height from Flange: 0.86". Temperature: 187F. If you want to keep your vehicle safe on the road...Great design and functionMade from sturdy materials$11.89
- Four Seasons®Engine Coolant Thermostat and Housing AssemblyGMC Sierra 4.8L / 5.3L / 6.0L 1999, Engine Coolant Thermostat and Housing Assembly by Four Seasons®. Material: Aluminum. Inlet Diameter: 1.222". Mounting Flange Thickness: 0.403". All products are engineered and tested to provide years...OE quality parts from top original equipment and aftermarket manufacturersThe finest quality at a great price$23.61
- Mahle®Engine Coolant ThermostatGMC Sierra 4.3L 1999, Engine Coolant Thermostat by Mahle®. Temperature: 92C. Height: 57.5 mm. Want to keep your engine from overheating? Replace your faulty engine coolant thermostat with this high-quality Mahle thermostat engineered to...Proven to keep engine coolant temperature at an optimal levelCrafted from the finest materials for exceptional dependability$12.11
- ACDelco®Professional™ Engine Coolant ThermostatGMC Sierra 1999, Professional™ Engine Coolant Thermostat by ACDelco®. ACDelco has a Thermostat and Cap for most GM vehicles on the road today. Engineered to work with your car, truck or SUV, ACDelco Professional™ Thermostats come in...Heavier-duty components and greater flow rates than standard-line thermostats.Designed to be OE-like$7.40 - $25.40
- MotoRad®Engine Coolant Thermostat KitGMC Sierra 1999, Engine Coolant Thermostat Kit by MotoRad®. State-of-the-art equipment, strict quality control, and functional testing to each thermostat ensure customers that they can trust the high quality product used in their vehicle.Offer precise pressure controlEnsure the proper fit$21.08 - $29.73
- MotoRad®Engine Coolant Thermostat SealGMC Sierra 4.3L 1999, Engine Coolant Thermostat Seal by MotoRad®. MotoRad seals and gaskets are made from high quality materials suitable for resistance to high temperatures and engine coolant to maintain a superior, long lasting seal.Made of High quality materialsResistance to high tempertures$0.65 - $0.79
- Mahle®Engine Coolant Thermostat GasketGMC Sierra 1999, Engine Coolant Thermostat Gasket by Mahle®. Keep your cooling system running leak-free, with superior-grade Mahle seals and gaskets designed to provide OE form, fit, and function. Made using advanced technology and the...Designed to seal your cooling system from leaksMade from high-quality materials for utmost reliability$0.81 - $1.53
- Elring®Engine Coolant Thermostat GasketGMC Sierra 1999, Engine Coolant Thermostat Gasket by Elring®. Increase the life of your vehicle's engine by keeping your cooling system in top condition. Replace your faulty engine cooling component with this highly efficient...Expertly Crafted from the highest grade materialsMade to provide maximum accuracy and dependability$3.42
- Victor Reinz®Engine Coolant Thermostat GasketGMC Sierra 4.8L / 5.3L / 6.0L 1999, Engine Coolant Thermostat Gasket by Victor Reinz®. Increase the life of your vehicle's engine by keeping your cooling system in top condition. Replace your faulty engine cooling component with this...OE quality parts from top original equipment and aftermarket manufacturersThe finest quality at a great price$0.88
- Stant®Engine Coolant Thermostat and Housing AssemblyGMC Sierra 4.8L / 5.3L / 6.0L 1999, Engine Coolant Thermostat and Housing Assembly by Stant®. Get fast engine warm-up and dependable engine operating temperature with a Stant thermostat. Stant’s exclusive ELAC® Thermostat Cutaway...Quality construction ensures exact fit and prolonged service lifeStainless steel bridge with channel-design for strength and rigidity$15.21 - $26.38
- ReplacementEngine Coolant Thermostat with HousingGMC Sierra 1999, Engine Coolant Thermostat with Housing by Replacement. This product is made of high-quality materials to serve you for years to come. Designed using state-of-the-art technology and with customers in mind, this product by...Expertly crafted from premium materialsDesigned to match rigorous quality standardsCall for Pricing
- iD Select®FailSafe™ Engine Coolant ThermostatGMC Sierra 1999, FailSafe™ Engine Coolant Thermostat by iD Select®. Swap out your worn-out or malfunctioning part with this top-notch product from iD Select. It’s built to OEM specifications to offer the same fit, form, and function...Direct OEM replacement for your malfunctioning partMade to deliver the ultimate in quality, reliability, and value$11.79 - $13.52
- Stant®Heavy Duty Engine Coolant ThermostatGMC Sierra 4.8L / 5.3L / 6.0L with GM Replacement Water Pump 1999, Heavy Duty Engine Coolant Thermostat by Stant®. With 1 seal and without Check Valves. Temperature: 186F. Get fast engine warm-up and dependable engine operating...Quality construction ensures exact fit and prolonged service life.Stainless steel bridge with channel-design for strength and rigidity.$15.21
- Stant®OE Type Engine Coolant ThermostatGMC Sierra 4.3L 1999, OE Type Engine Coolant Thermostat by Stant®. With 1 Seal and without Gaskets, Check Valves. Temperature: 195F. Stant Coolant Temperature Sensor, which can be found as original equipment on most major nameplates, is...Made to keep your vehicle's engine running coolDesigned to maintain proper cooling level and prevent overheating$9.21
- JET®ThermostatGMC Sierra 1999, Thermostat by JET®. Temperature: 180F. Jet Low-Temp Thermostats increase horsepower and control engine temp by consistently metering water flow throughout the engine instead of simply cycling open/close, which in OE...$17.96 - $59.24
- TruParts®Engine Coolant ThermostatGMC Sierra 4.8L / 5.3L / 6.0L with Servicable Thermostat 1999, Engine Coolant Thermostat by TruParts®. Temperature: 187F. Go with this high-quality product to restore your vehicle’s lost power and bring it back to its optimal...Made utilizing the finest materials and equipmentEngineered to restore your vehicle to its pristine condition$18.41
- Stant®Engine Coolant Thermostat SealGMC Sierra 4.3L 1999, Engine Coolant Thermostat Seal by Stant®. Increase the life of your vehicle's engine by keeping your cooling system in top condition. Replace your faulty engine cooling component with this highly efficient...Quality construction ensures exact fit and prolonged service life.Stainless steel bridge with channel-design for strength and rigidity.$1.00
- iD Select®Engine Coolant Thermostat SealGMC Sierra 4.3L 1999, Engine Coolant Thermostat Seal by iD Select®. Swap out your worn-out or malfunctioning part with this top-notch product from iD Select. It’s built to OEM specifications to offer the same fit, form, and function...Direct OEM replacement for your malfunctioning partMade to deliver the ultimate in quality, reliability, and value$1.04
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