Dorman 645-781 A/C Compressor Clutch Connector

Name: Dorman 645-781 A/C Compressor Clutch Connector
Brand: Dorman
SKU: BKLB-645-781
Price: 32.95 USD
Availability: InStock

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⚙️ 337 vehicles fit this part

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✅OE Direct Replacement — Bolt-on fit, no modifications needed

🚗Fitment: Chevrolet, Hummer, Pontiac, Buick, Cadillac, GMC, Workhorse, and Oldsmobile, HHR, H3, H3T, G6, H2, LeSabre, DeVille, Astro, Cavalier, Safari, Bonneville, FasTrack FT1261, FasTrack FT1461, FasTrack FT1601, FasTrack FT1801, P30, Seville, Alero, FasTrack FT1061, FasTrack FT1802, Eldorado, Express 1500, Express 2500, Express 3500, Savana 1500, Savana 2500, Savana 3500, Intrigue, FasTrack FT1460, FasTrack FT1260, FasTrack FT1600, FasTrack FT1800, Escalade, C2500, C3500, K2500, K3500, Suburban 1500, Tahoe, Yukon, C1500, C1500 Suburban, C2500 Suburban, K1500, K1500 Suburban, K2500 Suburban, Cutlass, Achieva, Trans Sport, Blazer, Riviera, and Reatta

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Reliable A/C Compressor Clutch Connector for GM Vehicles

The Dorman 645-781 A/C compressor clutch connector is designed to provide a secure and durable electrical connection for your vehicle's air conditioning system. Compatible with a range of Buick, Cadillac, Chevrolet, GMC, Hummer, Oldsmobile, and Pontiac models, this connector ensures consistent performance and ease of installation.

Wiring harness length of 8.25 inches for flexible routing
18-gauge wire for optimal electrical conductivity
Two-wire configuration with female blade terminals
Terminals made from tin-plated brass for corrosion resistance
Includes one harness and two butt connectors for secure splicing

Durable Construction and Precise Specifications

This A/C compressor clutch connector features an 8.25-inch wiring harness with 18-gauge wires, providing the right balance between flexibility and electrical capacity. The two-wire setup with female blade terminals ensures a reliable connection to the compressor clutch coil. Tin-plated brass terminals resist corrosion and maintain conductivity over time, which is critical for consistent A/C system operation. The package includes two butt connectors, allowing for secure and professional splicing during installation.

Compatible Vehicles and Applications

This connector is compatible with various GM vehicles, including Buick Achieva, Cadillac DeVille, Chevrolet Blazer, GMC Sierra models like C1500 and K2500, Hummer H2 and H3, Oldsmobile Cutlass, and Pontiac Bonneville among others. It is designed specifically for use with the A/C compressor clutch electrical system, making it suitable for models such as the Chevrolet Suburban 1500, Cadillac Escalade, and GMC Yukon.

Restores electrical connection to the A/C compressor clutch coil
Resolves intermittent compressor clutch engagement issues
Replaces damaged or corroded compressor clutch connectors
Prevents A/C system failure due to poor electrical contact
Supports reliable air conditioning operation in GM trucks and SUVs

Installation Notes and Tips

Before installation, verify compatibility with your specific vehicle make and model. Use the included butt connectors to splice wires securely, ensuring a tight and corrosion-resistant connection. Properly route the 8.25-inch harness to avoid contact with moving parts or heat sources. Confirm that the female blade terminals fit snugly onto the compressor clutch coil terminals to prevent electrical issues.

Quality Assurance and Warranty

Dorman parts are manufactured to meet or exceed OEM standards for fit, form, and function. The 645-781 A/C compressor clutch connector undergoes quality checks to ensure durability and reliable performance. While specific warranty details may vary, Dorman typically offers coverage against defects in materials and workmanship to support long-term use.

Brand	Dorman
Part Number	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

This part fits 337 vehicles. Search below:

Year	Make	Model	Liters	Cylinders	Position
2011	Chevrolet	HHR			N/A
2010	Chevrolet	HHR			N/A
2010	Hummer	H3			N/A
2010	Hummer	H3T			N/A
2010	Pontiac	G6			N/A
2009	Chevrolet	HHR			N/A
2009	Hummer	H2			N/A
2009	Hummer	H3			N/A
2009	Hummer	H3T			N/A
2009	Pontiac	G6			N/A
2008	Chevrolet	HHR			N/A
2008	Hummer	H2			N/A
2008	Hummer	H3			N/A
2008	Pontiac	G6			N/A
2007	Chevrolet	HHR			N/A
2007	Hummer	H2			N/A
2007	Hummer	H3			N/A
2007	Pontiac	G6			N/A
2006	Chevrolet	HHR			N/A
2006	Hummer	H2			N/A
2006	Hummer	H3			N/A
2006	Pontiac	G6			N/A
2005	Buick	LeSabre			N/A
2005	Cadillac	DeVille			N/A
2005	Chevrolet	Astro			N/A
2005	Chevrolet	Cavalier			N/A
2005	GMC	Safari			N/A
2005	Hummer	H2			N/A
2005	Pontiac	Bonneville			N/A
2005	Pontiac	G6			N/A
2004	Buick	LeSabre			N/A
2004	Cadillac	DeVille			N/A
2004	Cadillac	Seville			N/A
2004	Chevrolet	Astro			N/A
2004	Chevrolet	Cavalier			N/A
2004	GMC	Safari			N/A
2004	Hummer	H2			N/A
2004	Oldsmobile	Alero			N/A
2004	Pontiac	Bonneville			N/A
2003	Buick	LeSabre			N/A
2003	Cadillac	DeVille			N/A
2003	Cadillac	Seville			N/A
2003	Chevrolet	Astro			N/A
2003	Chevrolet	Cavalier			N/A
2003	GMC	Safari			N/A
2003	Hummer	H2			N/A
2003	Oldsmobile	Alero			N/A
2003	Pontiac	Bonneville			N/A
2002	Buick	LeSabre			N/A
2002	Cadillac	DeVille			N/A
2002	Cadillac	Eldorado			N/A
2002	Cadillac	Seville			N/A
2002	Chevrolet	Astro			N/A
2002	Chevrolet	Cavalier			N/A
2002	Chevrolet	Express 1500			N/A
2002	Chevrolet	Express 2500			N/A
2002	Chevrolet	Express 3500			N/A
2002	GMC	Safari			N/A
2002	GMC	Savana 1500			N/A
2002	GMC	Savana 2500			N/A
2002	GMC	Savana 3500			N/A
2002	Oldsmobile	Alero			N/A
2002	Oldsmobile	Intrigue			N/A
2002	Pontiac	Bonneville			N/A
2001	Buick	LeSabre			N/A
2001	Cadillac	DeVille			N/A
2001	Cadillac	Eldorado			N/A
2001	Cadillac	Seville			N/A
2001	Chevrolet	Astro			N/A
2001	Chevrolet	Cavalier			N/A
2001	Chevrolet	Express 1500			N/A
2001	Chevrolet	Express 2500			N/A
2001	Chevrolet	Express 3500			N/A
2001	GMC	Safari			N/A
2001	GMC	Savana 1500			N/A
2001	GMC	Savana 2500			N/A
2001	GMC	Savana 3500			N/A
2001	Oldsmobile	Alero			N/A
2001	Oldsmobile	Intrigue			N/A
2001	Pontiac	Bonneville			N/A
2000	Buick	LeSabre			N/A
2000	Cadillac	DeVille			N/A
2000	Cadillac	Eldorado			N/A
2000	Cadillac	Escalade			N/A
2000	Cadillac	Seville			N/A
2000	Chevrolet	Astro			N/A
2000	Chevrolet	C2500			N/A
2000	Chevrolet	C3500			N/A
2000	Chevrolet	Cavalier			N/A
2000	Chevrolet	Express 1500			N/A
2000	Chevrolet	Express 2500			N/A
2000	Chevrolet	Express 3500			N/A
2000	Chevrolet	K2500			N/A
2000	Chevrolet	K3500			N/A
2000	Chevrolet	Suburban 1500	5.7L	V8	N/A
2000	Chevrolet	Tahoe	5.7L	V8	N/A
2000	GMC	C2500			N/A
2000	GMC	C3500			N/A
2000	GMC	K2500			N/A
2000	GMC	K3500			N/A
2000	GMC	Safari			N/A
2000	GMC	Savana 1500			N/A
2000	GMC	Savana 2500			N/A
2000	GMC	Savana 3500			N/A
2000	GMC	Yukon	5.7L	V8	N/A
2000	Oldsmobile	Alero			N/A
2000	Oldsmobile	Intrigue			N/A
2000	Pontiac	Bonneville			N/A
1999	Cadillac	DeVille			N/A
1999	Cadillac	Eldorado			N/A
1999	Cadillac	Escalade			N/A
1999	Cadillac	Seville			N/A
1999	Chevrolet	Astro			N/A
1999	Chevrolet	C1500			N/A
1999	Chevrolet	C1500 Suburban			N/A
1999	Chevrolet	C2500			N/A
1999	Chevrolet	C2500 Suburban			N/A
1999	Chevrolet	C3500			N/A
1999	Chevrolet	Cavalier			N/A
1999	Chevrolet	Express 1500			N/A
1999	Chevrolet	Express 2500			N/A
1999	Chevrolet	Express 3500			N/A
1999	Chevrolet	K1500			N/A
1999	Chevrolet	K1500 Suburban			N/A
1999	Chevrolet	K2500			N/A
1999	Chevrolet	K2500 Suburban			N/A
1999	Chevrolet	K3500			N/A
1999	Chevrolet	Tahoe			N/A
1999	GMC	C1500			N/A
1999	GMC	C1500 Suburban			N/A
1999	GMC	C2500			N/A
1999	GMC	C2500 Suburban			N/A
1999	GMC	C3500			N/A
1999	GMC	K1500			N/A
1999	GMC	K1500 Suburban			N/A
1999	GMC	K2500			N/A
1999	GMC	K2500 Suburban			N/A
1999	GMC	K3500			N/A
1999	GMC	Safari			N/A
1999	GMC	Savana 1500			N/A
1999	GMC	Savana 2500			N/A
1999	GMC	Savana 3500			N/A
1999	GMC	Yukon			N/A
1999	Oldsmobile	Alero			N/A
1999	Oldsmobile	Cutlass			N/A
1999	Oldsmobile	Intrigue			N/A
1998	Cadillac	DeVille			N/A
1998	Cadillac	Eldorado			N/A
1998	Cadillac	Seville			N/A
1998	Chevrolet	Astro			N/A
1998	Chevrolet	C1500			N/A
1998	Chevrolet	C1500 Suburban			N/A
1998	Chevrolet	C2500			N/A
1998	Chevrolet	C2500 Suburban			N/A
1998	Chevrolet	C3500			N/A
1998	Chevrolet	Cavalier			N/A
1998	Chevrolet	Express 1500			N/A
1998	Chevrolet	Express 2500			N/A
1998	Chevrolet	Express 3500			N/A
1998	Chevrolet	K1500			N/A
1998	Chevrolet	K1500 Suburban			N/A
1998	Chevrolet	K2500			N/A
1998	Chevrolet	K2500 Suburban			N/A
1998	Chevrolet	K3500			N/A
1998	Chevrolet	Tahoe			N/A
1998	GMC	C1500			N/A
1998	GMC	C1500 Suburban			N/A
1998	GMC	C2500			N/A
1998	GMC	C2500 Suburban			N/A
1998	GMC	C3500			N/A
1998	GMC	K1500			N/A
1998	GMC	K1500 Suburban			N/A
1998	GMC	K2500			N/A
1998	GMC	K2500 Suburban			N/A
1998	GMC	K3500			N/A
1998	GMC	Safari			N/A
1998	GMC	Savana 1500			N/A
1998	GMC	Savana 2500			N/A
1998	GMC	Savana 3500			N/A
1998	GMC	Yukon			N/A
1998	Oldsmobile	Achieva			N/A
1998	Oldsmobile	Cutlass			N/A
1998	Oldsmobile	Intrigue			N/A
1997	Chevrolet	Astro			N/A
1997	Chevrolet	C1500			N/A
1997	Chevrolet	C1500 Suburban			N/A
1997	Chevrolet	C2500			N/A
1997	Chevrolet	C2500 Suburban			N/A
1997	Chevrolet	C3500			N/A
1997	Chevrolet	Cavalier			N/A
1997	Chevrolet	Express 1500			N/A
1997	Chevrolet	Express 2500			N/A
1997	Chevrolet	Express 3500			N/A
1997	Chevrolet	K1500			N/A
1997	Chevrolet	K1500 Suburban			N/A
1997	Chevrolet	K2500			N/A
1997	Chevrolet	K2500 Suburban			N/A
1997	Chevrolet	K3500			N/A
1997	Chevrolet	Tahoe			N/A
1997	GMC	C1500			N/A
1997	GMC	C1500 Suburban			N/A
1997	GMC	C2500			N/A
1997	GMC	C2500 Suburban			N/A
1997	GMC	C3500			N/A
1997	GMC	K1500			N/A
1997	GMC	K1500 Suburban			N/A
1997	GMC	K2500			N/A
1997	GMC	K2500 Suburban			N/A
1997	GMC	K3500			N/A
1997	GMC	Safari			N/A
1997	GMC	Savana 1500			N/A
1997	GMC	Savana 2500			N/A
1997	GMC	Savana 3500			N/A
1997	GMC	Yukon			N/A
1997	Oldsmobile	Achieva			N/A
1997	Oldsmobile	Cutlass			N/A
1996	Chevrolet	Astro			N/A
1996	Chevrolet	C1500			N/A
1996	Chevrolet	C1500 Suburban			N/A
1996	Chevrolet	C2500			N/A
1996	Chevrolet	C2500 Suburban			N/A
1996	Chevrolet	C3500			N/A
1996	Chevrolet	Cavalier			N/A
1996	Chevrolet	Express 1500			N/A
1996	Chevrolet	Express 2500			N/A
1996	Chevrolet	Express 3500			N/A
1996	Chevrolet	K1500			N/A
1996	Chevrolet	K1500 Suburban			N/A
1996	Chevrolet	K2500			N/A
1996	Chevrolet	K2500 Suburban			N/A
1996	Chevrolet	K3500			N/A
1996	Chevrolet	Tahoe			N/A
1996	GMC	C1500			N/A
1996	GMC	C1500 Suburban			N/A
1996	GMC	C2500			N/A
1996	GMC	C2500 Suburban			N/A
1996	GMC	C3500			N/A
1996	GMC	K1500			N/A
1996	GMC	K1500 Suburban			N/A
1996	GMC	K2500			N/A
1996	GMC	K2500 Suburban			N/A
1996	GMC	K3500			N/A
1996	GMC	Safari			N/A
1996	GMC	Savana 1500			N/A
1996	GMC	Savana 2500			N/A
1996	GMC	Savana 3500			N/A
1996	GMC	Yukon			N/A
1996	Oldsmobile	Achieva			N/A
1996	Pontiac	Trans Sport			N/A
1995	Chevrolet	Astro			N/A
1995	Chevrolet	C1500			N/A
1995	Chevrolet	C1500 Suburban			N/A
1995	Chevrolet	C2500			N/A
1995	Chevrolet	C2500 Suburban			N/A
1995	Chevrolet	C3500			N/A
1995	Chevrolet	Cavalier			N/A
1995	Chevrolet	K1500			N/A
1995	Chevrolet	K1500 Suburban			N/A
1995	Chevrolet	K2500			N/A
1995	Chevrolet	K2500 Suburban			N/A
1995	Chevrolet	K3500			N/A
1995	Chevrolet	Tahoe			N/A
1995	GMC	C1500			N/A
1995	GMC	C1500 Suburban			N/A
1995	GMC	C2500			N/A
1995	GMC	C2500 Suburban			N/A
1995	GMC	C3500			N/A
1995	GMC	K1500			N/A
1995	GMC	K1500 Suburban			N/A
1995	GMC	K2500			N/A
1995	GMC	K2500 Suburban			N/A
1995	GMC	K3500			N/A
1995	GMC	Safari			N/A
1995	GMC	Yukon			N/A
1995	Oldsmobile	Achieva			N/A
1995	Pontiac	Trans Sport			N/A
1994	Chevrolet	Astro			N/A
1994	Chevrolet	Blazer			N/A
1994	Chevrolet	C1500			N/A
1994	Chevrolet	C1500 Suburban			N/A
1994	Chevrolet	C2500			N/A
1994	Chevrolet	C2500 Suburban			N/A
1994	Chevrolet	C3500			N/A
1994	Chevrolet	K1500			N/A
1994	Chevrolet	K1500 Suburban			N/A
1994	Chevrolet	K2500			N/A
1994	Chevrolet	K2500 Suburban			N/A
1994	Chevrolet	K3500			N/A
1994	GMC	C1500			N/A
1994	GMC	C1500 Suburban			N/A
1994	GMC	C2500			N/A
1994	GMC	C2500 Suburban			N/A
1994	GMC	C3500			N/A
1994	GMC	K1500			N/A
1994	GMC	K1500 Suburban			N/A
1994	GMC	K2500			N/A
1994	GMC	K2500 Suburban			N/A
1994	GMC	K3500			N/A
1994	GMC	Safari			N/A
1994	GMC	Yukon			N/A
1994	Oldsmobile	Achieva			N/A
1994	Pontiac	Trans Sport			N/A
1993	Buick	Riviera			N/A
1993	Chevrolet	Astro			N/A
1993	Chevrolet	Blazer			N/A
1993	Chevrolet	C1500 Suburban			N/A
1993	Chevrolet	C2500 Suburban			N/A
1993	Chevrolet	K1500 Suburban			N/A
1993	Chevrolet	K2500 Suburban			N/A
1993	GMC	C1500 Suburban			N/A
1993	GMC	C2500 Suburban			N/A
1993	GMC	K1500 Suburban			N/A
1993	GMC	K2500 Suburban			N/A
1993	GMC	Safari			N/A
1993	GMC	Yukon			N/A
1993	Oldsmobile	Achieva			N/A
1993	Pontiac	Trans Sport			N/A
1992	Buick	Riviera			N/A
1992	Chevrolet	Blazer			N/A
1992	Chevrolet	C1500 Suburban			N/A
1992	Chevrolet	C2500 Suburban			N/A
1992	Chevrolet	K1500 Suburban			N/A
1992	Chevrolet	K2500 Suburban			N/A
1992	GMC	C1500 Suburban			N/A
1992	GMC	C2500 Suburban			N/A
1992	GMC	K1500 Suburban			N/A
1992	GMC	K2500 Suburban			N/A
1992	GMC	Yukon			N/A
1992	Pontiac	Trans Sport			N/A
1991	Buick	Reatta			N/A
1991	Buick	Riviera			N/A
1991	Pontiac	Trans Sport			N/A
1990	Buick	Reatta			N/A
1990	Buick	Riviera			N/A
1990	Pontiac	Trans Sport			N/A
1989	Buick	Reatta			N/A
1989	Buick	Riviera			N/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:

121019371P1239607EC12PT178PT209S-588

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