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Dorman 645-164 Engine Coolant Temperature Sensor ConnectorOE Quality 60-Day Returns
Part #: 645-164

Dorman 645-164 Engine Coolant Temperature Sensor Connector

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158 vehicles fit this part
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Fitment: Buick, Chevrolet, GMC, Cadillac, Saturn, and Pontiac, Enclave, Traverse, Acadia, Acadia Limited, Silverado 2500 HD, Silverado 3500 HD, Sierra 2500 HD, Sierra 3500 HD, Camaro, Malibu, LaCrosse, CTS, SRX, STS, Allure, Captiva Sport, Express 2500, Express 3500, Savana 2500, Savana 3500, Outlook, Vue, G6, G8, Torrent, Aura, Silverado 2500 HD Classic, Silverado 3500 Classic, Sierra 2500 HD Classic, Sierra 3500 Classic, Rendezvous, Silverado 3500, and Sierra 3500
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Engine Coolant Temperature Sensor Connector

Dorman 645-164 is an engine coolant temperature sensor connector pigtail built for clean electrical repairs and accessory installations. It uses weatherproof terminals and a locking tab to help maintain a secure quick-disconnect connection on the vehicle.

Key Features

  • Engine coolant temperature sensor connector pigtail for electrical repair work
  • 17-inch wiring harness length for flexible routing
  • 2-wire design with 14-gauge wire
  • 2-pin connector with male connector gender and female terminal gender
  • Weatherproof terminals and locking tab for a secure connection
  • Includes waterproof 16-14 AWG butt connectors for splicing

Detailed Description

This Dorman connector is a direct-fit style repair solution for restoring damaged coolant temperature sensor wiring on a wide range of GM vehicles. Dorman 645-164 is commonly selected for Chevrolet Silverado 2500 HD and Silverado 3500 HD, GMC Sierra 2500 HD and Sierra 3500 HD, as well as Buick Enclave, Chevrolet Traverse, and GMC Acadia applications. It is also used across additional Buick, Cadillac, Chevrolet, GMC, Pontiac, Saturn, and Chevrolet Express/GMC Savana fitments listed below. This part cross-references OE-style numbers such as 88988584 and PT2183 for the same application.

What It Helps Fix

  • Broken or heat-damaged coolant sensor connector housings
  • Corroded terminals that interrupt sensor signal
  • Frayed or brittle wiring near the engine coolant temperature sensor
  • Intermittent temperature gauge or engine management readings caused by poor electrical contact
  • Failed quick-disconnect retention at the sensor plug

Installation Notes and Tips

Match the 2-pin connector layout and wire colors before splicing. Use proper crimping and sealing practices at the butt connections, and route the harness away from exhaust heat, moving components, and sharp edges. Confirm the connector seats fully and the locking tab engages after installation. Fits 2008-2017 Buick Enclave, 2009-2017 Chevrolet Traverse, 2007-2017 GMC Acadia, and additional listed GM applications.

Quality Assurance

Dorman designs this pigtail connector for a clean installed appearance and dependable electrical connection using weatherproof terminals and a locking tab. It is built as a repair-focused replacement for damaged coolant temperature sensor connectors.

  • Fits 2008-2017 Buick Enclave
  • Fits 2009-2017 Chevrolet Traverse
  • Fits 2007-2017 GMC Acadia
  • Fits 2017 GMC Acadia Limited
  • Fits 2006-2014 Chevrolet Silverado 2500 HD
  • Fits 2007-2014 Chevrolet Silverado 3500 HD
  • Fits 2006-2014 GMC Sierra 2500 HD
  • Fits 2007-2014 GMC Sierra 3500 HD
  • Fits 2010-2012 Chevrolet Camaro
  • Fits 2008-2012 Chevrolet Malibu
  • Fits 2010-2011 Buick LaCrosse
  • Fits 2005-2008 Buick LaCrosse
  • Fits 2005-2011 Cadillac CTS
  • Fits 2004-2011 Cadillac SRX
  • Fits 2005-2011 Cadillac STS
  • Fits 2010 Buick Allure
  • Fits 2005-2008 Buick Allure
  • Fits 2008-2010 Chevrolet Captiva Sport
  • Fits 2006-2010 Chevrolet Express 2500
  • Fits 2006-2010 Chevrolet Express 3500
  • Fits 2006-2010 GMC Savana 2500
  • Fits 2006-2010 GMC Savana 3500
  • Fits 2007-2010 Saturn Outlook
  • Fits 2008-2010 Saturn Vue
  • Fits 2007-2009 Pontiac G6
  • Fits 2008-2009 Pontiac G8
  • Fits 2008-2009 Pontiac Torrent
  • Fits 2007-2009 Saturn Aura
  • Fits 2007 Chevrolet Silverado 2500 HD Classic
  • Fits 2007 Chevrolet Silverado 3500 Classic
  • Fits 2007 GMC Sierra 2500 HD Classic
  • Fits 2007 GMC Sierra 3500 HD Classic
  • Fits 2004-2006 Buick Rendezvous
  • Fits 2006 Chevrolet Silverado 3500
  • Fits 2006 GMC Sierra 3500
BrandDorman
Part Number645-164
Connector GenderMale
Package Contents1 Pigtail; 2 Waterproof 16-14 AWG Butt Connectors
Terminal GenderFemale
Terminal MaterialPlastic
Terminal Quantity2
Terminal TypePin
Wire Gauge Measurement14
Wiring Harness Length17

This part fits 158 vehicles. Search below:

YearMakeModelLitersCylindersPositionNotes
2017BuickEnclave3.6LV6N/A
2017ChevroletTraverse3.6LV6N/A
2017GMCAcadia3.6LV6N/A
2017GMCAcadia Limited3.6LV6N/A
2016BuickEnclave3.6LV6N/A
2016ChevroletTraverse3.6LV6N/A
2016GMCAcadia3.6LV6N/A
2015BuickEnclave3.6LV6N/A
2015ChevroletTraverse3.6LV6N/A
2015GMCAcadia3.6LV6N/A
2014BuickEnclave3.6LV6N/A
2014ChevroletSilverado 2500 HD6.6LV8N/A
2014ChevroletSilverado 3500 HD6.6LV8N/A
2014ChevroletTraverse3.6LV6N/A
2014GMCAcadia3.6LV6N/A
2014GMCSierra 2500 HD6.6LV8N/A
2014GMCSierra 3500 HD6.6LV8N/A
2013BuickEnclave3.6LV6N/A
2013ChevroletSilverado 2500 HD6.6LV8N/A
2013ChevroletSilverado 3500 HD6.6LV8N/A
2013ChevroletTraverse3.6LV6N/A
2013GMCAcadia3.6LV6N/A
2013GMCSierra 2500 HD6.6LV8N/A
2013GMCSierra 3500 HD6.6LV8N/A
2012BuickEnclave3.6LV6N/A
2012ChevroletCamaro3.6LV6N/A
2012ChevroletMalibu3.6LV6N/A
2012ChevroletSilverado 2500 HD6.6LV8N/A
2012ChevroletSilverado 3500 HD6.6LV8N/A
2012ChevroletTraverse3.6LV6N/A
2012GMCAcadia3.6LV6N/A
2012GMCSierra 2500 HD6.6LV8N/A
2012GMCSierra 3500 HD6.6LV8N/A
2011BuickEnclave3.6LV6N/A
2011BuickLaCrosse3.6LV6N/A
2011CadillacCTS3.6LV6N/A
2011CadillacSRX2.8LV6N/A
2011CadillacSTS3.6LV6N/A
2011ChevroletCamaro3.6LV6N/A
2011ChevroletMalibu3.6LV6N/A
2011ChevroletSilverado 2500 HD6.6LV8N/A
2011ChevroletSilverado 3500 HD6.6LV8N/A
2011ChevroletTraverse3.6LV6N/A
2011GMCAcadia3.6LV6N/A
2011GMCSierra 2500 HD6.6LV8N/A
2011GMCSierra 3500 HD6.6LV8N/A
2010BuickAllure3.6LV6N/A
2010BuickEnclave3.6LV6N/A
2010BuickLaCrosse3.6LV6N/A
2010CadillacCTS3.6LV6N/A
2010CadillacSRX2.8LV6N/A
2010CadillacSTS3.6LV6N/A
2010ChevroletCamaro3.6LV6N/A
2010ChevroletCaptiva Sport3.6LV6N/A
2010ChevroletExpress 25006.6LV8N/A
2010ChevroletExpress 35006.6LV8N/A
2010ChevroletMalibu3.6LV6N/A
2010ChevroletSilverado 2500 HD6.6LV8N/A
2010ChevroletSilverado 3500 HD6.6LV8N/A
2010ChevroletTraverse3.6LV6N/A
2010GMCAcadia3.6LV6N/A
2010GMCSavana 25006.6LV8N/A
2010GMCSavana 35006.6LV8N/A
2010GMCSierra 2500 HD6.6LV8N/A
2010GMCSierra 3500 HD6.6LV8N/A
2010SaturnOutlook3.6LV6N/A
2010SaturnVue3.6LV6N/A
2009BuickEnclave3.6LV6N/A
2009CadillacCTS3.6LV6N/A
2009CadillacSRX3.6LV6N/A
2009CadillacSTS3.6LV6N/A
2009ChevroletCaptiva Sport3.6LV6N/A
2009ChevroletExpress 25006.6LV8N/A
2009ChevroletExpress 35006.6LV8N/A
2009ChevroletMalibu3.6LV6N/A
2009ChevroletSilverado 2500 HD6.6LV8N/A
2009ChevroletSilverado 3500 HD6.6LV8N/A
2009ChevroletTraverse3.6LV6N/A
2009GMCAcadia3.6LV6N/A
2009GMCSavana 25006.6LV8N/A
2009GMCSavana 35006.6LV8N/A
2009GMCSierra 2500 HD6.6LV8N/A
2009GMCSierra 3500 HD6.6LV8N/A
2009PontiacG63.6LV6N/A
2009PontiacG83.6LV6N/A
2009PontiacTorrent3.6LV6N/A
2009SaturnAura3.6LV6N/A
2009SaturnOutlook3.6LV6N/A
2009SaturnVue3.6LV6N/A
2008BuickAllure3.6LV6N/A
2008BuickEnclave3.6LV6N/A
2008BuickLaCrosse3.6LV6N/A
2008CadillacCTS3.6LV6N/A
2008CadillacSRX3.6LV6N/A
2008CadillacSTS3.6LV6N/A
2008ChevroletCaptiva Sport3.6LV6N/A
2008ChevroletExpress 25006.6LV8N/A
2008ChevroletExpress 35006.6LV8N/A
2008ChevroletMalibu3.6LV6N/A
2008ChevroletSilverado 2500 HD6.6LV8N/A
2008ChevroletSilverado 3500 HD6.6LV8N/A
2008GMCAcadia3.6LV6N/A
2008GMCSavana 25006.6LV8N/A
2008GMCSavana 35006.6LV8N/A
2008GMCSierra 2500 HD6.6LV8N/A
2008GMCSierra 3500 HD6.6LV8N/A
2008PontiacG63.6LV6N/A
2008PontiacG83.6LV6N/A
2008PontiacTorrent3.6LV6N/A
2008SaturnAura3.6LV6N/A
2008SaturnOutlook3.6LV6N/A
2008SaturnVue3.6LV6N/A
2007BuickAllure3.6LV6N/A
2007BuickLaCrosse3.6LV6N/A
2007CadillacCTS2.8LV6N/A
2007CadillacCTS3.6LV6N/A
2007CadillacSRX3.6LV6N/A
2007CadillacSTS3.6LV6N/A
2007ChevroletExpress 25006.6LV8N/A
2007ChevroletExpress 35006.6LV8N/A
2007ChevroletSilverado 2500 HD6.6LV8N/A
2007ChevroletSilverado 2500 HD Classic6.6LV8N/A
2007ChevroletSilverado 3500 Classic6.6LV8N/A
2007ChevroletSilverado 3500 HD6.6LV8N/A
2007GMCAcadia3.6LV6N/A
2007GMCSavana 25006.6LV8N/A
2007GMCSavana 35006.6LV8N/A
2007GMCSierra 2500 HD6.6LV8N/A
2007GMCSierra 2500 HD Classic6.6LV8N/A
2007GMCSierra 3500 Classic6.6LV8N/A
2007GMCSierra 3500 HD6.6LV8N/A
2007PontiacG63.6LV6N/A
2007SaturnAura3.6LV6N/A
2007SaturnOutlook3.6LV6N/A
2006BuickAllure3.6LV6N/A
2006BuickLaCrosse3.6LV6N/A
2006BuickRendezvous3.6LV6N/A
2006CadillacCTS2.8LV6N/A
2006CadillacCTS3.6LV6N/A
2006CadillacSRX3.6LV6N/A
2006CadillacSTS3.6LV6N/A
2006ChevroletExpress 25006.6LV8N/A
2006ChevroletExpress 35006.6LV8N/A
2006ChevroletSilverado 2500 HD6.6LV8N/A
2006ChevroletSilverado 35006.6LV8N/A
2006GMCSavana 25006.6LV8N/A
2006GMCSavana 35006.6LV8N/A
2006GMCSierra 2500 HD6.6LV8N/A
2006GMCSierra 35006.6LV8N/A
2005BuickAllure3.6LV6N/A
2005BuickLaCrosse3.6LV6N/A
2005BuickRendezvous3.6LV6N/A
2005CadillacCTS2.8LV6N/A
2005CadillacCTS3.6LV6N/A
2005CadillacSRX3.6LV6N/A
2005CadillacSTS3.6LV6N/A
2004BuickRendezvous3.6LV6N/A
2004CadillacSRX3.6LV6N/A

* 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:

88988584PT2183

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