Dorman 645-781 A/C Compressor Clutch Connector

Brand Dorman 645-781
Package Contents 1 Harness - 2 Butt Connectors
Terminal Gender Female
Terminal Material Tin Brass (Tin Plate)
Terminal Type Blade
Wire Gauge Measurement 18
Wire Quantity 2
Wiring Harness Length 8.25
Fits Chevrolet, Hummer, Pontiac, Buick, Cadillac, GMC, Workhorse, and Oldsmobile · 337 vehicles

OE-style replacement. Matches the original connector's appearance and function.

Quality materials. Built for reliable performance and durability.

Blade terminals. Female terminals with tin brass contacts for a secure connection.

Cross-references MOOG Driveline Products 607, Standard Ignition S-588 and 1P1239 for the same application. See all 7.

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Free returns within 60 days if it doesn't fit when fitment is verified.

Dorman 645-781 A/C Compressor Clutch Connector

This Dorman A/C compressor clutch connector is built for direct replacement on a wide range of GM vehicles, including Chevrolet HHR, Chevrolet Astro, GMC Safari, and Pontiac G6 applications. It is made with quality materials and engineered to match the original connector’s appearance and function for dependable HVAC electrical repair.

Key Features

  • Direct replacement A/C compressor clutch connector for HVAC electrical repair
  • 8.25-inch wiring harness length for serviceable routing
  • 18-gauge, 2-wire design with female blade terminals
  • Tin brass terminal material for stable electrical contact
  • Built to match the original hardware on specified applications
  • Cross-references Standard Ignition S-588 for the same application

Detailed Description

The Dorman 645-781 is an A/C compressor clutch connector designed for vehicles that need a replacement for damaged, heat-worn, or corroded compressor clutch wiring. It uses a 2-wire layout with female blade terminals and an 18-gauge harness to support a clean electrical connection at the compressor clutch circuit. This connector is a practical repair part for maintaining HVAC system operation on vehicles such as the Chevrolet HHR, Pontiac G6, and GMC Safari.

Fitment coverage spans model years from 1989 through 2011 across many Chevrolet, GMC, Buick, Cadillac, Oldsmobile, Pontiac, and Hummer applications. This part number, 645-781, is also referenced by other catalog numbers used for the same application, including Standard Ignition S-588.

What It Helps Repair

  • Broken or brittle A/C compressor clutch connector housings
  • Corroded or heat-damaged electrical terminals
  • Intermittent compressor clutch engagement caused by poor connection
  • HVAC electrical faults at the compressor clutch circuit
  • Wiring repairs on Chevrolet HHR, Pontiac G6, and GMC Safari models

Installation Notes and Tips

Inspect the compressor clutch pigtail and mating terminals before installation. Verify wire routing, terminal alignment, and connector fitment against the original part before splicing. Use proper electrical repair practices and confirm secure terminal engagement after installation. Confirm vehicle-specific fitment for your exact year, make, and model before ordering.

Quality Assurance

Dorman manufactures this connector to match original hardware form and function on specified applications, using quality materials for reliable performance and durability. Part number 645-781 is engineered as a replacement solution for common A/C compressor clutch connector failures in OEM-style HVAC electrical repairs.

Compatible Vehicles

  • Fits 2006-2011 Chevrolet HHR, N/A
  • Fits 2006-2010 Hummer H3, N/A
  • Fits 2009-2010 Hummer H3T, N/A
  • Fits 2005-2010 Pontiac G6, N/A
  • Fits 2003-2009 Hummer H2, N/A
  • Fits 2000-2005 Buick LeSabre, N/A
  • Fits 1998-2005 Cadillac DeVille, N/A
  • Fits 1993-2005 Chevrolet Astro, N/A
  • Fits 1995-2005 Chevrolet Cavalier, N/A
  • Fits 1993-2005 GMC Safari, N/A
  • Fits 2000-2005 Pontiac Bonneville, N/A
  • Fits 1998-2004 Cadillac Seville, N/A
  • Fits 1999-2004 Oldsmobile Alero, N/A
  • Fits 1998-2002 Cadillac Eldorado, N/A
  • Fits 1996-2002 Chevrolet Express 1500, N/A
  • Fits 1996-2002 Chevrolet Express 2500, N/A
  • Fits 1996-2002 Chevrolet Express 3500, N/A
  • Fits 1996-2002 GMC Savana 1500, N/A
  • Fits 1996-2002 GMC Savana 2500, N/A
  • Fits 1996-2002 GMC Savana 3500, N/A
  • Fits 1998-2002 Oldsmobile Intrigue, N/A
  • Fits 1999-2000 Cadillac Escalade, N/A
  • Fits 1994-2000 Chevrolet C2500, N/A
  • Fits 1994-2000 Chevrolet C3500, N/A
  • Fits 1994-2000 Chevrolet K2500, N/A
  • Fits 1994-2000 Chevrolet K3500, N/A
  • Fits 2000 Chevrolet Suburban 1500, N/A
  • Fits 1995-2000 Chevrolet Tahoe, N/A
  • Fits 1994-2000 GMC C2500, N/A
  • Fits 1994-2000 GMC C3500, N/A
  • Fits 1994-2000 GMC K2500, N/A
  • Fits 1994-2000 GMC K3500, N/A
  • Fits 1992-2000 GMC Yukon, N/A
  • Fits 1994-1999 Chevrolet C1500, N/A
  • Fits 1992-1999 Chevrolet C1500 Suburban, N/A
  • Fits 1992-1999 Chevrolet C2500 Suburban, N/A
  • Fits 1994-1999 Chevrolet K1500, N/A
  • Fits 1992-1999 Chevrolet K1500 Suburban, N/A
  • Fits 1992-1999 Chevrolet K2500 Suburban, N/A
  • Fits 1994-1999 GMC C1500, N/A
  • Fits 1992-1999 GMC C1500 Suburban, N/A
  • Fits 1992-1999 GMC C2500 Suburban, N/A
  • Fits 1994-1999 GMC K1500, N/A
  • Fits 1992-1999 GMC K1500 Suburban, N/A
  • Fits 1992-1999 GMC K2500 Suburban, N/A
  • Fits 1997-1999 Oldsmobile Cutlass, N/A
  • Fits 1993-1998 Oldsmobile Achieva, N/A
  • Fits 1990-1996 Pontiac Trans Sport, N/A
  • Fits 1992-1994 Chevrolet Blazer, N/A
  • Fits 1989-1993 Buick Riviera, N/A
  • Fits 1989-1991 Buick Reatta, N/A
This part fits 337 vehicles
Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.
YearMakeModelLitersCylindersPositionNotes
2011ChevroletHHR——N/A—
2010ChevroletHHR——N/A—
2010HummerH3——N/A—
2010HummerH3T——N/A—
2010PontiacG6——N/A—
2009ChevroletHHR——N/A—
2009HummerH2——N/A—
2009HummerH3——N/A—
2009HummerH3T——N/A—
2009PontiacG6——N/A—
2008ChevroletHHR——N/A—
2008HummerH2——N/A—
2008HummerH3——N/A—
2008PontiacG6——N/A—
2007ChevroletHHR——N/A—
2007HummerH2——N/A—
2007HummerH3——N/A—
2007PontiacG6——N/A—
2006ChevroletHHR——N/A—
2006HummerH2——N/A—
2006HummerH3——N/A—
2006PontiacG6——N/A—
2005BuickLeSabre——N/A—
2005CadillacDeVille——N/A—
2005ChevroletAstro——N/A—
2005ChevroletCavalier——N/A—
2005GMCSafari——N/A—
2005HummerH2——N/A—
2005PontiacBonneville——N/A—
2005PontiacG6——N/A—
2004BuickLeSabre——N/A—
2004CadillacDeVille——N/A—
2004CadillacSeville——N/A—
2004ChevroletAstro——N/A—
2004ChevroletCavalier——N/A—
2004GMCSafari——N/A—
2004HummerH2——N/A—
2004OldsmobileAlero——N/A—
2004PontiacBonneville——N/A—
2003BuickLeSabre——N/A—
2003CadillacDeVille——N/A—
2003CadillacSeville——N/A—
2003ChevroletAstro——N/A—
2003ChevroletCavalier——N/A—
2003GMCSafari——N/A—
2003HummerH2——N/A—
2003OldsmobileAlero——N/A—
2003PontiacBonneville——N/A—
2002BuickLeSabre——N/A—
2002CadillacDeVille——N/A—
2002CadillacEldorado——N/A—
2002CadillacSeville——N/A—
2002ChevroletAstro——N/A—
2002ChevroletCavalier——N/A—
2002ChevroletExpress 1500——N/A—
2002ChevroletExpress 2500——N/A—
2002ChevroletExpress 3500——N/A—
2002GMCSafari——N/A—
2002GMCSavana 1500——N/A—
2002GMCSavana 2500——N/A—
2002GMCSavana 3500——N/A—
2002OldsmobileAlero——N/A—
2002OldsmobileIntrigue——N/A—
2002PontiacBonneville——N/A—
2001BuickLeSabre——N/A—
2001CadillacDeVille——N/A—
2001CadillacEldorado——N/A—
2001CadillacSeville——N/A—
2001ChevroletAstro——N/A—
2001ChevroletCavalier——N/A—
2001ChevroletExpress 1500——N/A—
2001ChevroletExpress 2500——N/A—
2001ChevroletExpress 3500——N/A—
2001GMCSafari——N/A—
2001GMCSavana 1500——N/A—
2001GMCSavana 2500——N/A—
2001GMCSavana 3500——N/A—
2001OldsmobileAlero——N/A—
2001OldsmobileIntrigue——N/A—
2001PontiacBonneville——N/A—
2000BuickLeSabre——N/A—
2000CadillacDeVille——N/A—
2000CadillacEldorado——N/A—
2000CadillacEscalade——N/A—
2000CadillacSeville——N/A—
2000ChevroletAstro——N/A—
2000ChevroletC2500——N/A—
2000ChevroletC3500——N/A—
2000ChevroletCavalier——N/A—
2000ChevroletExpress 1500——N/A—
2000ChevroletExpress 2500——N/A—
2000ChevroletExpress 3500——N/A—
2000ChevroletK2500——N/A—
2000ChevroletK3500——N/A—
2000ChevroletSuburban 15005.7LV8N/A—
2000ChevroletTahoe5.7LV8N/A—
2000GMCC2500——N/A—
2000GMCC3500——N/A—
2000GMCK2500——N/A—
2000GMCK3500——N/A—
2000GMCSafari——N/A—
2000GMCSavana 1500——N/A—
2000GMCSavana 2500——N/A—
2000GMCSavana 3500——N/A—
2000GMCYukon5.7LV8N/A—
2000OldsmobileAlero——N/A—
2000OldsmobileIntrigue——N/A—
2000PontiacBonneville——N/A—
1999CadillacDeVille——N/A—
1999CadillacEldorado——N/A—
1999CadillacEscalade——N/A—
1999CadillacSeville——N/A—
1999ChevroletAstro——N/A—
1999ChevroletC1500——N/A—
1999ChevroletC1500 Suburban——N/A—
1999ChevroletC2500——N/A—
1999ChevroletC2500 Suburban——N/A—
1999ChevroletC3500——N/A—
1999ChevroletCavalier——N/A—
1999ChevroletExpress 1500——N/A—
1999ChevroletExpress 2500——N/A—
1999ChevroletExpress 3500——N/A—
1999ChevroletK1500——N/A—
1999ChevroletK1500 Suburban——N/A—
1999ChevroletK2500——N/A—
1999ChevroletK2500 Suburban——N/A—
1999ChevroletK3500——N/A—
1999ChevroletTahoe——N/A—
1999GMCC1500——N/A—
1999GMCC1500 Suburban——N/A—
1999GMCC2500——N/A—
1999GMCC2500 Suburban——N/A—
1999GMCC3500——N/A—
1999GMCK1500——N/A—
1999GMCK1500 Suburban——N/A—
1999GMCK2500——N/A—
1999GMCK2500 Suburban——N/A—
1999GMCK3500——N/A—
1999GMCSafari——N/A—
1999GMCSavana 1500——N/A—
1999GMCSavana 2500——N/A—
1999GMCSavana 3500——N/A—
1999GMCYukon——N/A—
1999OldsmobileAlero——N/A—
1999OldsmobileCutlass——N/A—
1999OldsmobileIntrigue——N/A—
1998CadillacDeVille——N/A—
1998CadillacEldorado——N/A—
1998CadillacSeville——N/A—
1998ChevroletAstro——N/A—
1998ChevroletC1500——N/A—
1998ChevroletC1500 Suburban——N/A—
1998ChevroletC2500——N/A—
1998ChevroletC2500 Suburban——N/A—
1998ChevroletC3500——N/A—
1998ChevroletCavalier——N/A—
1998ChevroletExpress 1500——N/A—
1998ChevroletExpress 2500——N/A—
1998ChevroletExpress 3500——N/A—
1998ChevroletK1500——N/A—
1998ChevroletK1500 Suburban——N/A—
1998ChevroletK2500——N/A—
1998ChevroletK2500 Suburban——N/A—
1998ChevroletK3500——N/A—
1998ChevroletTahoe——N/A—
1998GMCC1500——N/A—
1998GMCC1500 Suburban——N/A—
1998GMCC2500——N/A—
1998GMCC2500 Suburban——N/A—
1998GMCC3500——N/A—
1998GMCK1500——N/A—
1998GMCK1500 Suburban——N/A—
1998GMCK2500——N/A—
1998GMCK2500 Suburban——N/A—
1998GMCK3500——N/A—
1998GMCSafari——N/A—
1998GMCSavana 1500——N/A—
1998GMCSavana 2500——N/A—
1998GMCSavana 3500——N/A—
1998GMCYukon——N/A—
1998OldsmobileAchieva——N/A—
1998OldsmobileCutlass——N/A—
1998OldsmobileIntrigue——N/A—
1997ChevroletAstro——N/A—
1997ChevroletC1500——N/A—
1997ChevroletC1500 Suburban——N/A—
1997ChevroletC2500——N/A—
1997ChevroletC2500 Suburban——N/A—
1997ChevroletC3500——N/A—
1997ChevroletCavalier——N/A—
1997ChevroletExpress 1500——N/A—
1997ChevroletExpress 2500——N/A—
1997ChevroletExpress 3500——N/A—
1997ChevroletK1500——N/A—
1997ChevroletK1500 Suburban——N/A—
1997ChevroletK2500——N/A—
1997ChevroletK2500 Suburban——N/A—
1997ChevroletK3500——N/A—
1997ChevroletTahoe——N/A—
1997GMCC1500——N/A—
1997GMCC1500 Suburban——N/A—
1997GMCC2500——N/A—
1997GMCC2500 Suburban——N/A—
1997GMCC3500——N/A—
1997GMCK1500——N/A—
1997GMCK1500 Suburban——N/A—
1997GMCK2500——N/A—
1997GMCK2500 Suburban——N/A—
1997GMCK3500——N/A—
1997GMCSafari——N/A—
1997GMCSavana 1500——N/A—
1997GMCSavana 2500——N/A—
1997GMCSavana 3500——N/A—
1997GMCYukon——N/A—
1997OldsmobileAchieva——N/A—
1997OldsmobileCutlass——N/A—
1996ChevroletAstro——N/A—
1996ChevroletC1500——N/A—
1996ChevroletC1500 Suburban——N/A—
1996ChevroletC2500——N/A—
1996ChevroletC2500 Suburban——N/A—
1996ChevroletC3500——N/A—
1996ChevroletCavalier——N/A—
1996ChevroletExpress 1500——N/A—
1996ChevroletExpress 2500——N/A—
1996ChevroletExpress 3500——N/A—
1996ChevroletK1500——N/A—
1996ChevroletK1500 Suburban——N/A—
1996ChevroletK2500——N/A—
1996ChevroletK2500 Suburban——N/A—
1996ChevroletK3500——N/A—
1996ChevroletTahoe——N/A—
1996GMCC1500——N/A—
1996GMCC1500 Suburban——N/A—
1996GMCC2500——N/A—
1996GMCC2500 Suburban——N/A—
1996GMCC3500——N/A—
1996GMCK1500——N/A—
1996GMCK1500 Suburban——N/A—
1996GMCK2500——N/A—
1996GMCK2500 Suburban——N/A—
1996GMCK3500——N/A—
1996GMCSafari——N/A—
1996GMCSavana 1500——N/A—
1996GMCSavana 2500——N/A—
1996GMCSavana 3500——N/A—
1996GMCYukon——N/A—
1996OldsmobileAchieva——N/A—
1996PontiacTrans Sport——N/A—
1995ChevroletAstro——N/A—
1995ChevroletC1500——N/A—
1995ChevroletC1500 Suburban——N/A—
1995ChevroletC2500——N/A—
1995ChevroletC2500 Suburban——N/A—
1995ChevroletC3500——N/A—
1995ChevroletCavalier——N/A—
1995ChevroletK1500——N/A—
1995ChevroletK1500 Suburban——N/A—
1995ChevroletK2500——N/A—
1995ChevroletK2500 Suburban——N/A—
1995ChevroletK3500——N/A—
1995ChevroletTahoe——N/A—
1995GMCC1500——N/A—
1995GMCC1500 Suburban——N/A—
1995GMCC2500——N/A—
1995GMCC2500 Suburban——N/A—
1995GMCC3500——N/A—
1995GMCK1500——N/A—
1995GMCK1500 Suburban——N/A—
1995GMCK2500——N/A—
1995GMCK2500 Suburban——N/A—
1995GMCK3500——N/A—
1995GMCSafari——N/A—
1995GMCYukon——N/A—
1995OldsmobileAchieva——N/A—
1995PontiacTrans Sport——N/A—
1994ChevroletAstro——N/A—
1994ChevroletBlazer——N/A—
1994ChevroletC1500——N/A—
1994ChevroletC1500 Suburban——N/A—
1994ChevroletC2500——N/A—
1994ChevroletC2500 Suburban——N/A—
1994ChevroletC3500——N/A—
1994ChevroletK1500——N/A—
1994ChevroletK1500 Suburban——N/A—
1994ChevroletK2500——N/A—
1994ChevroletK2500 Suburban——N/A—
1994ChevroletK3500——N/A—
1994GMCC1500——N/A—
1994GMCC1500 Suburban——N/A—
1994GMCC2500——N/A—
1994GMCC2500 Suburban——N/A—
1994GMCC3500——N/A—
1994GMCK1500——N/A—
1994GMCK1500 Suburban——N/A—
1994GMCK2500——N/A—
1994GMCK2500 Suburban——N/A—
1994GMCK3500——N/A—
1994GMCSafari——N/A—
1994GMCYukon——N/A—
1994OldsmobileAchieva——N/A—
1994PontiacTrans Sport——N/A—
1993BuickRiviera——N/A—
1993ChevroletAstro——N/A—
1993ChevroletBlazer——N/A—
1993ChevroletC1500 Suburban——N/A—
1993ChevroletC2500 Suburban——N/A—
1993ChevroletK1500 Suburban——N/A—
1993ChevroletK2500 Suburban——N/A—
1993GMCC1500 Suburban——N/A—
1993GMCC2500 Suburban——N/A—
1993GMCK1500 Suburban——N/A—
1993GMCK2500 Suburban——N/A—
1993GMCSafari——N/A—
1993GMCYukon——N/A—
1993OldsmobileAchieva——N/A—
1993PontiacTrans Sport——N/A—
1992BuickRiviera——N/A—
1992ChevroletBlazer——N/A—
1992ChevroletC1500 Suburban——N/A—
1992ChevroletC2500 Suburban——N/A—
1992ChevroletK1500 Suburban——N/A—
1992ChevroletK2500 Suburban——N/A—
1992GMCC1500 Suburban——N/A—
1992GMCC2500 Suburban——N/A—
1992GMCK1500 Suburban——N/A—
1992GMCK2500 Suburban——N/A—
1992GMCYukon——N/A—
1992PontiacTrans Sport——N/A—
1991BuickReatta——N/A—
1991BuickRiviera——N/A—
1991PontiacTrans Sport——N/A—
1990BuickReatta——N/A—
1990BuickRiviera——N/A—
1990PontiacTrans Sport——N/A—
1989BuickReatta——N/A—
1989BuickRiviera——N/A—
Directly replaces or cross-references 7 part numbers
Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.
MOOG Driveline Products — 607Standard Ignition — S-5881P123912101937EC12PT178PT209