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Dorman 645-939 Engine Coolant Temperature Sensor ConnectorOE Quality 60-Day Returns
Part #: 645-939

Dorman 645-939 Engine Coolant Temperature Sensor Connector

⚙️ 197 vehicles fit this part
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🚗Fitment: Chevrolet, GMC, Oldsmobile, and Pontiac, Astro, Blazer, Bravada, C1500, C1500 Suburban, C2500 Suburban, C35, C3500, Camaro, Express 1500, Express 2500, Express 3500, Firebird, G10, G20, Jimmy, K1500, K1500 Suburban, K2500 Suburban, K3500, P30, P3500, S10, S10 Blazer, Safari, Savana 1500, Savana 2500, Savana 3500, Silverado, Sonoma, Suburban 1500, Tahoe, and Yukon
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Reliable Engine Coolant Temperature Sensor Connector

The Dorman 645-939 Engine Coolant Temperature Sensor Connector is designed to provide a secure and efficient electrical connection for your vehicle's cooling system. Engineered for compatibility with various Chevrolet, GMC, Oldsmobile, and Pontiac models, this connector ensures accurate temperature sensor readings essential for engine performance.

  • Wiring harness length of 17.1 inches for flexible installation
  • 18-gauge wire for optimal electrical conductivity
  • Female blade terminal type made from tin-plated brass for corrosion resistance
  • Includes one harness and one butt connector for a complete connection solution
  • Single wire quantity designed specifically for engine coolant temperature sensor applications

Durable Design and Precise Specifications

The Dorman 645-939 connector features an 18-gauge wire that balances durability and electrical efficiency, ensuring consistent sensor signal transmission. The female blade terminal is crafted from tin-plated brass, providing resistance to corrosion and wear in harsh engine environments. With a wiring harness length of 17.1 inches, this connector offers sufficient reach for installation in engine bays of Chevrolet Silverado, GMC Sierra, Pontiac Firebird, and other compatible models. The included butt connector facilitates a secure splice, maintaining signal integrity and preventing electrical faults.

Compatible Vehicles and Applications

This engine coolant temperature sensor connector is compatible with a range of Chevrolet, GMC, Oldsmobile, and Pontiac vehicles, including but not limited to:

  • Chevrolet Silverado, Suburban 1500, Tahoe, and S10 Blazer
  • GMC Sierra, Jimmy, Safari, and Yukon
  • Oldsmobile and Pontiac models such as Firebird and Camaro
  • Express 1500, 2500, and 3500 vans
  • Various truck models including C1500, C2500 Suburban, and K3500

Common Issues Addressed by This Connector

  • Intermittent or faulty engine coolant temperature sensor readings
  • Corroded or damaged sensor wiring connections
  • Electrical shorts or open circuits in the sensor harness
  • Engine overheating due to inaccurate temperature data
  • Check engine light triggered by sensor connection faults

Installation Notes and Tips

When installing the Dorman 645-939 connector, ensure the wiring harness is routed away from high-heat sources and moving parts to prevent damage. Use proper crimping tools for the included butt connector to secure a reliable electrical connection. Verify the female blade terminal fits snugly with the sensor terminal to avoid loose contacts. Always disconnect the vehicle battery before beginning installation to prevent electrical shorts.

Quality Assurance and Warranty

Dorman parts are manufactured to meet or exceed OEM standards, providing dependable performance for your vehicle's electrical system. The 645-939 Engine Coolant Temperature Sensor Connector undergoes rigorous quality control to ensure durability and fitment accuracy. Please refer to Dorman's official warranty policy for specific coverage details.

BrandDorman
Part Number645-939
Wiring Harness Length17.1
Wire Gauge Measurement18
Terminal TypeBlade
Package Contents1 harness - 1 butt connector
Terminal GenderFemale
Terminal MaterialTin brass (tin plate)
Wire Quantity1

This part fits 197 vehicles. Search below:

YearMakeModel# DoorsTransmissionLitersCylindersPositionNotes
2005ChevroletAstroN/A
2005GMCSafariN/A
2004ChevroletAstroN/A
2004GMCSafariN/A
2003ChevroletAstroN/A
2003GMCSafariN/A
2002ChevroletAstroN/A
2002ChevroletExpress 15004.3LV6N/A
2002ChevroletExpress 15005.7LV8N/A
2002ChevroletExpress 15005.0LV8N/A
2002ChevroletExpress 25004.3LV6N/A
2002ChevroletExpress 25005.7LV8N/A
2002ChevroletExpress 25005.0LV8N/A
2002ChevroletExpress 35005.7LV8N/A
2002GMCSafariN/A
2002GMCSavana 15004.3LV6N/A
2002GMCSavana 15005.7LV8N/A
2002GMCSavana 15005.0LV8N/A
2002GMCSavana 25004.3LV6N/A
2002GMCSavana 25005.7LV8N/A
2002GMCSavana 25005.0LV8N/A
2002GMCSavana 35005.7LV8N/A
2001ChevroletAstroN/A
2001ChevroletExpress 1500N/A
2001ChevroletExpress 2500N/A
2001ChevroletExpress 3500N/A
2001GMCSafariN/A
2001GMCSavana 1500N/A
2001GMCSavana 2500N/A
2001GMCSavana 3500N/A
2000ChevroletAstroN/A
2000ChevroletExpress 1500N/A
2000ChevroletExpress 2500N/A
2000ChevroletExpress 3500N/A
2000GMCSafariN/A
2000GMCSavana 1500N/A
2000GMCSavana 2500N/A
2000GMCSavana 3500N/A
1999ChevroletAstroN/A
1999ChevroletExpress 1500N/A
1999ChevroletExpress 2500N/A
1999ChevroletExpress 3500N/A
1999ChevroletP30N/A
1999GMCP3500N/A
1999GMCSafariN/A
1999GMCSavana 1500N/A
1999GMCSavana 2500N/A
1999GMCSavana 3500N/A
1998ChevroletAstroN/A
1998ChevroletExpress 1500N/A
1998ChevroletExpress 2500N/A
1998ChevroletExpress 3500N/A
1998ChevroletP30N/A
1998GMCP3500N/A
1998GMCSafariN/A
1998GMCSavana 1500N/A
1998GMCSavana 2500N/A
1998GMCSavana 3500N/A
1997ChevroletAstroN/A
1997ChevroletCamaro5.7LV8N/ABlue; 1 Wire
1997ChevroletExpress 1500N/A
1997ChevroletExpress 2500N/A
1997ChevroletExpress 3500N/A
1997ChevroletP30N/A
1997GMCP3500N/A
1997GMCSafariN/A
1997GMCSavana 1500N/A
1997GMCSavana 2500N/A
1997GMCSavana 3500N/A
1997PontiacFirebird5.7LV8N/ABlue; 1 Wire
1996ChevroletAstroN/A
1996ChevroletExpress 1500N/A
1996ChevroletExpress 2500N/A
1996ChevroletExpress 3500N/A
1996ChevroletP30N/A
1996GMCG3500N/A
1996GMCP3500N/A
1996GMCSafariN/A
1996GMCSavana 1500N/A
1996GMCSavana 2500N/A
1996GMCSavana 3500N/A
1996PontiacFirebird5.7LV8N/ABlue; 1 Wire
1995ChevroletAstroN/AConnector
1995ChevroletC1500Automatic5.7LV8N/A
1995ChevroletC1500 SuburbanAutomatic5.7LV8N/A
1995ChevroletC2500 Suburban4 DoorAutomatic5.7LV8N/Aw/Manual Air Conditioning Controls; wo/Rear Auxiliary Air Conditioning; w/Radiator Booster Fan
1995ChevroletC35Automatic5.7LV8N/A
1995ChevroletC3500Automatic5.7LV8N/A
1995ChevroletG10N/A
1995ChevroletG20N/A
1995ChevroletK1500Automatic5.7LV8N/A
1995ChevroletK1500 SuburbanAutomatic5.7LV8N/A
1995ChevroletK2500 Suburban4 DoorAutomatic5.7LV8N/Aw/Manual Air Conditioning Controls; wo/Rear Auxiliary Air Conditioning; w/Radiator Booster Fan
1995ChevroletK3500Automatic5.7LV8N/A
1995ChevroletP30N/A
1995ChevroletSilveradoAutomatic5.7LV8N/A
1995ChevroletSuburban 1500Automatic5.7LV8N/A
1995ChevroletTahoeAutomatic5.7LV8N/A
1995GMCC1500Automatic5.7LV8N/A
1995GMCC1500 SuburbanAutomatic5.7LV8N/A
1995GMCC2500 Suburban4 DoorAutomatic5.7LV8N/Aw/Manual Air Conditioning Controls; wo/Rear Auxiliary Air Conditioning; w/Radiator Booster Fan
1995GMCC3500Automatic5.7LV8N/A
1995GMCG1500N/A
1995GMCG2500N/A
1995GMCG3500N/A
1995GMCK1500Automatic5.7LV8N/A
1995GMCK1500 SuburbanAutomatic5.7LV8N/A
1995GMCK2500 Suburban4 DoorAutomatic5.7LV8N/Aw/Manual Air Conditioning Controls; wo/Rear Auxiliary Air Conditioning; w/Radiator Booster Fan
1995GMCK3500Automatic5.7LV8N/A
1995GMCP3500N/A
1995GMCSafariN/Aw/Heavy Duty Heater
1995GMCYukonAutomatic5.7LV8N/A
1995PontiacFirebird3.4LV6N/ABlue; 1 Wire
1995PontiacFirebird5.7LV8N/ABlue; 1 Wire
1994ChevroletAstroN/AConnector
1994ChevroletBlazerAutomatic5.7LV8N/A
1994ChevroletC1500Automatic5.7LV8N/A
1994ChevroletC1500 SuburbanAutomatic5.7LV8N/A
1994ChevroletC2500 Suburban4 DoorAutomatic5.7LV8N/Aw/Manual Air Conditioning Controls; wo/Rear Auxiliary Air Conditioning; w/Radiator Booster Fan
1994ChevroletG10N/A
1994ChevroletG20N/A
1994ChevroletK1500Automatic5.7LV8N/A
1994ChevroletK1500 SuburbanAutomatic5.7LV8N/A
1994ChevroletK2500 Suburban4 DoorAutomatic5.7LV8N/Aw/Manual Air Conditioning Controls; wo/Rear Auxiliary Air Conditioning; w/Radiator Booster Fan
1994ChevroletP30N/A
1994ChevroletS104.3LV6N/Aw/Heavy Duty Heater
1994ChevroletS10 Blazer4.3LV6N/Aw/Heavy Duty Heater
1994GMCC1500Automatic5.7LV8N/A
1994GMCC1500 SuburbanAutomatic5.7LV8N/A
1994GMCC2500 Suburban4 DoorAutomatic5.7LV8N/Aw/Manual Air Conditioning Controls; wo/Rear Auxiliary Air Conditioning; w/Radiator Booster Fan
1994GMCG1500N/A
1994GMCG2500N/A
1994GMCG3500N/A
1994GMCJimmy4.3LV6N/Aw/Heavy Duty Heater
1994GMCK1500Automatic5.7LV8N/A
1994GMCK1500 SuburbanAutomatic5.7LV8N/A
1994GMCK2500 Suburban4 DoorAutomatic5.7LV8N/Aw/Manual Air Conditioning Controls; wo/Rear Auxiliary Air Conditioning; w/Radiator Booster Fan
1994GMCP3500N/A
1994GMCSafariN/Aw/Heavy Duty Heater
1994GMCSonoma4.3LV6N/Aw/Heavy Duty Heater
1994GMCYukonAutomatic5.7LV8N/A
1994OldsmobileBravada4.3LV6N/Aw/Heavy Duty Heater
1994PontiacFirebird3.4LV6N/ABlue; 1 Wire
1994PontiacFirebird5.7LV8N/ABlue; 1 Wire
1993ChevroletAstroN/AConnector
1993ChevroletBlazerAutomatic5.7LV8N/A
1993ChevroletC1500Automatic7.4LV8N/A
1993ChevroletC1500Automatic5.7LV8N/A
1993ChevroletC1500 SuburbanAutomatic5.7LV8N/A
1993ChevroletC2500 Suburban4 DoorAutomatic7.4LV8N/Aw/Manual Air Conditioning Controls; wo/Rear Auxiliary Air Conditioning; w/Radiator Booster Fan
1993ChevroletC2500 Suburban4 DoorAutomatic5.7LV8N/Aw/Manual Air Conditioning Controls; wo/Rear Auxiliary Air Conditioning; w/Radiator Booster Fan
1993ChevroletG105.7LV8N/A
1993ChevroletG105.0LV8N/A
1993ChevroletG205.7LV8N/A
1993ChevroletG205.0LV8N/A
1993ChevroletK1500Automatic5.7LV8N/A
1993ChevroletK1500 SuburbanAutomatic5.7LV8N/A
1993ChevroletK2500 Suburban4 DoorAutomatic7.4LV8N/Aw/Manual Air Conditioning Controls; wo/Rear Auxiliary Air Conditioning; w/Radiator Booster Fan
1993ChevroletK2500 Suburban4 DoorAutomatic5.7LV8N/Aw/Manual Air Conditioning Controls; wo/Rear Auxiliary Air Conditioning; w/Radiator Booster Fan
1993ChevroletP30N/A
1993ChevroletS104.3LV6N/Aw/Heavy Duty Heater
1993ChevroletS102.8LV6N/Aw/Heavy Duty Heater
1993ChevroletS10 Blazer4.3LV6N/Aw/Heavy Duty Heater
1993GMCC1500Automatic5.7LV8N/A
1993GMCC1500 SuburbanAutomatic5.7LV8N/A
1993GMCC2500 Suburban4 DoorAutomatic7.4LV8N/Aw/Manual Air Conditioning Controls; wo/Rear Auxiliary Air Conditioning; w/Radiator Booster Fan
1993GMCC2500 Suburban4 DoorAutomatic5.7LV8N/Aw/Manual Air Conditioning Controls; wo/Rear Auxiliary Air Conditioning; w/Radiator Booster Fan
1993GMCG35006.2LV8N/A
1993GMCG35007.4LV8N/A
1993GMCG35005.7LV8N/A
1993GMCJimmy4.3LV6N/Aw/Heavy Duty Heater
1993GMCK1500Automatic5.7LV8N/A
1993GMCK1500 SuburbanAutomatic5.7LV8N/A
1993GMCK2500 Suburban4 DoorAutomatic7.4LV8N/Aw/Manual Air Conditioning Controls; wo/Rear Auxiliary Air Conditioning; w/Radiator Booster Fan
1993GMCK2500 Suburban4 DoorAutomatic5.7LV8N/Aw/Manual Air Conditioning Controls; wo/Rear Auxiliary Air Conditioning; w/Radiator Booster Fan
1993GMCP3500N/A
1993GMCSafariN/Aw/Heavy Duty Heater
1993GMCSonoma4.3LV6N/Aw/Heavy Duty Heater
1993GMCSonoma2.8LV6N/Aw/Heavy Duty Heater
1993GMCYukonAutomatic5.7LV8N/A
1993OldsmobileBravada4.3LV6N/Aw/Heavy Duty Heater
1993PontiacFirebird3.4LV6N/ABlue; 1 Wire
1993PontiacFirebird5.7LV8N/ABlue; 1 Wire
1992ChevroletBlazer5.7LV8N/A
1992ChevroletC15005.7LV8N/A
1992ChevroletC15005.0LV8N/A
1992ChevroletC1500 Suburban5.7LV8N/A
1992ChevroletK15005.7LV8N/A
1992ChevroletK15005.0LV8N/A
1992ChevroletK1500 Suburban5.7LV8N/A
1992GMCC15005.7LV8N/A
1992GMCC15005.0LV8N/A
1992GMCC1500 Suburban5.7LV8N/A
1992GMCJimmyN/Aw/Heavy Duty Heater
1992GMCSonomaN/Aw/Heavy Duty Heater
1992GMCYukon5.7LV8N/A
1992OldsmobileBravadaN/Aw/Heavy Duty Heater

* Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.

This part directly replaces or is cross-referenced with the following part numbers:

121264581P1470838EC435PT5838PT728S-963

Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.