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Standard Ignition S-643 Fuel Pump ConnectorOE Quality 60-Day Returns
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Part #: S-643

Standard Ignition S-643 Fuel Pump Connector

⚙️ 340 vehicles fit this part
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🚗Fitment: Chevrolet, GMC, Buick, Oldsmobile, and Pontiac, Express 1500, Express 2500, Express 3500, Savana 1500, Savana 2500, Savana 3500, Astro, Yukon, Blazer, C1500, C1500 Suburban, C2500, C2500 Suburban, C3500, K1500, K1500 Suburban, K2500, K2500 Suburban, K3500, Tahoe, Jimmy, Safari, Regal, G10, G20, G30, Lumina, Lumina APV, S10 Blazer, G1500, G2500, G3500, Cutlass Cruiser, Cutlass Supreme, Bonneville, Grand Prix, Century, S10, Camaro, Firebird, 6000, Tempest, Skylark, S15, S15 Jimmy, R1500 Suburban, R2500, R2500 Suburban, R3500, V1500 Suburban, V2500 Suburban, and V3500
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Reliable Fuel Pump Connector for Select GM Vehicles

The Standard Ignition S-643 fuel pump connector is designed to provide a secure and efficient electrical connection for fuel pump systems. Engineered for compatibility with various Buick, Chevrolet, GMC, Oldsmobile, and Pontiac models, this connector ensures consistent fuel delivery and electrical performance.

  • Connector Gender: Male
  • Terminal Gender: Female
  • Terminal Type: Blade
  • Includes one pigtail assembly with one wire
  • Designed for use with fuel pump electrical systems

Durable Design and Precise Fitment

The S-643 fuel pump connector features a male connector housing paired with a female blade terminal, providing a reliable and corrosion-resistant connection. This single-wire pigtail assembly is built to meet OEM specifications, ensuring proper fit and function across a range of GM vehicles including Chevrolet Silverado, GMC Sierra, Buick Century, Pontiac Grand Prix, and Oldsmobile Cutlass models. The blade terminal design facilitates easy installation and secure electrical contact, critical for maintaining consistent fuel pump operation.

Compatible Vehicles and Applications

This fuel pump connector is compatible with multiple GM makes and models, including but not limited to:

  • Buick Century, Skylark, Regal
  • Chevrolet Astro, Blazer, Camaro, S10, Tahoe
  • GMC Jimmy, Sierra (C1500, C2500, C3500), Yukon
  • Oldsmobile Cutlass Supreme, Cutlass Cruiser, 6000
  • Pontiac Firebird, Grand Prix, Tempest

It is ideal for replacing worn or damaged fuel pump connectors to restore proper electrical connectivity and fuel system reliability.

Common Issues Addressed by the S-643 Connector

  • Intermittent fuel pump operation due to poor electrical connection
  • Corroded or damaged terminals causing voltage drops
  • Loose or broken wiring harness connections
  • Fuel pump failure related to connector wear
  • Electrical shorts or open circuits in fuel pump wiring

Installation Notes and Tips

When installing the Standard Ignition S-643 fuel pump connector, ensure the vehicle’s battery is disconnected to prevent electrical shorts. Verify the connector orientation matches the original equipment to maintain proper polarity. Use dielectric grease on terminals to reduce corrosion and improve conductivity. Confirm that the blade terminal is fully seated within the connector housing for a secure fit. This connector is designed for straightforward replacement without the need for splicing or modifications.

Quality Assurance and Warranty

Standard Ignition parts are manufactured to meet or exceed OEM standards, providing dependable performance and durability. The S-643 fuel pump connector undergoes rigorous quality control to ensure consistent fit and function. While specific warranty details may vary, Standard Ignition typically offers coverage against defects in materials and workmanship, supporting long-term reliability for your fuel delivery system.

BrandStandard Ignition
Part NumberS-643
Connector GenderMale
ContentsPigtail Assembly
Terminal GenderFemale
Terminal TypeBlade

This part fits 340 vehicles. Search below:

YearMakeModelPositionNotes
2000ChevroletExpress 1500N/A
2000ChevroletExpress 2500N/A
2000ChevroletExpress 3500N/A
2000GMCSavana 1500N/A
2000GMCSavana 2500N/A
2000GMCSavana 3500N/A
1999ChevroletAstroN/A
1999GMCYukonN/ARear window defogger module connector compatible with rear HVAC floor mode door actuator harness and power seat switch.
1998ChevroletAstroN/A
1998ChevroletExpress 1500N/A
1998ChevroletExpress 2500N/A
1998ChevroletExpress 3500N/A
1998GMCSavana 1500N/A
1998GMCSavana 2500N/A
1998GMCSavana 3500N/A
1997ChevroletAstroN/A
1997ChevroletExpress 1500N/A
1997ChevroletExpress 2500N/A
1997ChevroletExpress 3500N/A
1997GMCSavana 1500N/A
1997GMCSavana 2500N/A
1997GMCSavana 3500N/A
1996ChevroletAstroN/A
1996ChevroletBlazerN/A
1996ChevroletC1500N/A
1996ChevroletC1500 SuburbanN/A
1996ChevroletC2500N/A
1996ChevroletC2500 SuburbanN/A
1996ChevroletC3500N/A
1996ChevroletK1500N/A
1996ChevroletK1500 SuburbanN/A
1996ChevroletK2500N/A
1996ChevroletK2500 SuburbanN/A
1996ChevroletK3500N/A
1996ChevroletTahoeN/A
1996GMCC1500N/A
1996GMCC1500 SuburbanN/A
1996GMCC2500N/A
1996GMCC2500 SuburbanN/A
1996GMCC3500N/A
1996GMCJimmyN/A
1996GMCK1500N/A
1996GMCK1500 SuburbanN/A
1996GMCK2500N/A
1996GMCK2500 SuburbanN/A
1996GMCK3500N/A
1996GMCSafariN/A
1996GMCYukonN/A
1995BuickRegalN/A
1995ChevroletC1500N/A
1995ChevroletC2500N/A
1995ChevroletC3500N/A
1995ChevroletK1500N/A
1995ChevroletK2500N/A
1995ChevroletK3500N/A
1995GMCC1500N/A
1995GMCC2500N/A
1995GMCC3500N/A
1995GMCK1500N/A
1995GMCK2500N/A
1995GMCK3500N/A
1994BuickRegalN/A
1994ChevroletBlazerN/ARear window defogger module connector compatible with rear HVAC floor mode door actuator harness and power seat switch.
1994ChevroletC1500N/A
1994ChevroletC1500N/ARear window defogger module connector compatible with rear HVAC floor mode door actuator harness and power seat switch.
1994ChevroletC1500 SuburbanN/ARear window defogger module connector compatible with rear HVAC floor mode door actuator harness and power seat switch.
1994ChevroletC2500N/A
1994ChevroletC2500N/ARear window defogger module connector compatible with rear HVAC floor mode door actuator harness and power seat switch.
1994ChevroletC2500 SuburbanN/ARear window defogger module connector compatible with rear HVAC floor mode door actuator harness and power seat switch.
1994ChevroletC3500N/A
1994ChevroletC3500N/ARear window defogger module connector compatible with rear HVAC floor mode door actuator harness and power seat switch.
1994ChevroletG10N/A
1994ChevroletG20N/A
1994ChevroletG30N/A
1994ChevroletK1500N/A
1994ChevroletK1500N/ARear window defogger module connector compatible with rear HVAC floor mode door actuator harness and power seat switch.
1994ChevroletK1500 SuburbanN/ARear window defogger module connector compatible with rear HVAC floor mode door actuator harness and power seat switch.
1994ChevroletK2500N/A
1994ChevroletK2500N/ARear window defogger module connector compatible with rear HVAC floor mode door actuator harness and power seat switch.
1994ChevroletK2500 SuburbanN/ARear window defogger module connector compatible with rear HVAC floor mode door actuator harness and power seat switch.
1994ChevroletK3500N/A
1994ChevroletK3500N/ARear window defogger module connector compatible with rear HVAC floor mode door actuator harness and power seat switch.
1994ChevroletLuminaN/A
1994ChevroletLumina APVN/A
1994ChevroletS10 BlazerN/A
1994GMCC1500N/A
1994GMCC1500N/AGray; 1 Term. Female; Rear
1994GMCC1500 SuburbanN/AGray; 1 Term. Female; Rear
1994GMCC2500N/AGray; 1 Term. Female; Rear
1994GMCC2500N/A
1994GMCC2500 SuburbanN/AGray; 1 Term. Female; Rear
1994GMCC3500N/AGray; 1 Term. Female; Rear
1994GMCC3500N/A
1994GMCG1500N/A
1994GMCG2500N/A
1994GMCG3500N/A
1994GMCJimmyN/A
1994GMCJimmyN/AGray; 1 Term. Female; Rear
1994GMCK1500N/AGray; 1 Term. Female; Rear
1994GMCK1500N/A
1994GMCK1500 SuburbanN/AGray; 1 Term. Female; Rear
1994GMCK2500N/A
1994GMCK2500N/AGray; 1 Term. Female; Rear
1994GMCK2500 SuburbanN/AGray; 1 Term. Female; Rear
1994GMCK3500N/AGray; 1 Term. Female; Rear
1994GMCK3500N/A
1994GMCYukonN/AGray; 1 Term. Female; Rear
1994OldsmobileCutlass CruiserN/A
1994OldsmobileCutlass SupremeN/A
1994PontiacBonnevilleN/A
1994PontiacGrand PrixN/A
1993BuickCenturyN/A1 Term. Female
1993BuickCenturyN/A
1993BuickRegalN/A
1993ChevroletBlazerN/ARear window defogger module connector compatible with rear HVAC floor mode door actuator harness and power seat switch.
1993ChevroletC1500N/A
1993ChevroletC1500N/ARear window defogger module connector compatible with rear HVAC floor mode door actuator harness and power seat switch.
1993ChevroletC1500 SuburbanN/ARear window defogger module connector compatible with rear HVAC floor mode door actuator harness and power seat switch.
1993ChevroletC2500N/A
1993ChevroletC2500N/ARear window defogger module connector compatible with rear HVAC floor mode door actuator harness and power seat switch.
1993ChevroletC2500 SuburbanN/ARear window defogger module connector compatible with rear HVAC floor mode door actuator harness and power seat switch.
1993ChevroletC3500N/A
1993ChevroletC3500N/ARear window defogger module connector compatible with rear HVAC floor mode door actuator harness and power seat switch.
1993ChevroletG10N/AGray; 1 Term. Female
1993ChevroletG10N/A
1993ChevroletG10N/ARear window defogger module connector compatible with rear HVAC floor mode door actuator harness and power seat switch.
1993ChevroletG20N/AGray; 1 Term. Female
1993ChevroletG20N/A
1993ChevroletG20N/ARear window defogger module connector compatible with rear HVAC floor mode door actuator harness and power seat switch.
1993ChevroletG30N/AGray; 1 Term. Female
1993ChevroletG30N/A
1993ChevroletG30N/ARear window defogger module connector compatible with rear HVAC floor mode door actuator harness and power seat switch.
1993ChevroletK1500N/A
1993ChevroletK1500N/ARear window defogger module connector compatible with rear HVAC floor mode door actuator harness and power seat switch.
1993ChevroletK1500 SuburbanN/ARear window defogger module connector compatible with rear HVAC floor mode door actuator harness and power seat switch.
1993ChevroletK2500N/A
1993ChevroletK2500N/ARear window defogger module connector compatible with rear HVAC floor mode door actuator harness and power seat switch.
1993ChevroletK2500 SuburbanN/ARear window defogger module connector compatible with rear HVAC floor mode door actuator harness and power seat switch.
1993ChevroletK3500N/A
1993ChevroletK3500N/ARear window defogger module connector compatible with rear HVAC floor mode door actuator harness and power seat switch.
1993ChevroletLuminaN/A
1993ChevroletLumina APVN/A
1993ChevroletS10N/A
1993ChevroletS10 BlazerN/A
1993GMCC1500N/A
1993GMCC2500N/A
1993GMCC3500N/A
1993GMCG1500N/AGray; 1 Term. Female
1993GMCG1500N/A
1993GMCG2500N/AGray; 1 Term. Female
1993GMCG2500N/A
1993GMCG3500N/AGray; 1 Term. Female
1993GMCG3500N/A
1993GMCJimmyN/A
1993GMCK1500N/A
1993GMCK2500N/A
1993GMCK3500N/A
1993OldsmobileCutlass SupremeN/A
1993PontiacBonnevilleN/A
1993PontiacGrand PrixN/A
1992BuickRegalN/A
1992ChevroletBlazerN/ARear window defogger module connector compatible with rear HVAC floor mode door actuator harness and power seat switch.
1992ChevroletC1500N/A
1992ChevroletC1500N/ARear window defogger module connector compatible with rear HVAC floor mode door actuator harness and power seat switch.
1992ChevroletC1500 SuburbanN/ARear window defogger module connector compatible with rear HVAC floor mode door actuator harness and power seat switch.
1992ChevroletC2500N/A
1992ChevroletC2500N/ARear window defogger module connector compatible with rear HVAC floor mode door actuator harness and power seat switch.
1992ChevroletC2500 SuburbanN/ARear window defogger module connector compatible with rear HVAC floor mode door actuator harness and power seat switch.
1992ChevroletC3500N/A
1992ChevroletC3500N/ARear window defogger module connector compatible with rear HVAC floor mode door actuator harness and power seat switch.
1992ChevroletCamaroN/A
1992ChevroletG10N/AGray; 1 Term. Female
1992ChevroletG10N/ARear window defogger module connector compatible with rear HVAC floor mode door actuator harness and power seat switch.
1992ChevroletG20N/AGray; 1 Term. Female
1992ChevroletG20N/ARear window defogger module connector compatible with rear HVAC floor mode door actuator harness and power seat switch.
1992ChevroletG30N/AGray; 1 Term. Female
1992ChevroletG30N/ARear window defogger module connector compatible with rear HVAC floor mode door actuator harness and power seat switch.
1992ChevroletK1500N/A
1992ChevroletK1500N/ARear window defogger module connector compatible with rear HVAC floor mode door actuator harness and power seat switch.
1992ChevroletK1500 SuburbanN/ARear window defogger module connector compatible with rear HVAC floor mode door actuator harness and power seat switch.
1992ChevroletK2500N/A
1992ChevroletK2500N/ARear window defogger module connector compatible with rear HVAC floor mode door actuator harness and power seat switch.
1992ChevroletK2500 SuburbanN/ARear window defogger module connector compatible with rear HVAC floor mode door actuator harness and power seat switch.
1992ChevroletK3500N/A
1992ChevroletK3500N/ARear window defogger module connector compatible with rear HVAC floor mode door actuator harness and power seat switch.
1992ChevroletLuminaN/A
1992ChevroletLumina APVN/A
1992ChevroletS10 BlazerN/A
1992GMCC1500N/A
1992GMCC1500N/ARear window defogger module connector compatible with rear HVAC floor mode door actuator harness and power seat switch.
1992GMCC1500 SuburbanN/ARear window defogger module connector compatible with rear HVAC floor mode door actuator harness and power seat switch.
1992GMCC2500N/A
1992GMCC2500N/ARear window defogger module connector compatible with rear HVAC floor mode door actuator harness and power seat switch.
1992GMCC2500 SuburbanN/ARear window defogger module connector compatible with rear HVAC floor mode door actuator harness and power seat switch.
1992GMCC3500N/A
1992GMCC3500N/ARear window defogger module connector compatible with rear HVAC floor mode door actuator harness and power seat switch.
1992GMCG1500N/AGray; 1 Term. Female
1992GMCG2500N/AGray; 1 Term. Female
1992GMCG3500N/AGray; 1 Term. Female
1992GMCJimmyN/AGray; 1 Term. Female; Rear
1992GMCJimmyN/A
1992GMCK1500N/A
1992GMCK1500N/ARear window defogger module connector compatible with rear HVAC floor mode door actuator harness and power seat switch.
1992GMCK1500 SuburbanN/ARear window defogger module connector compatible with rear HVAC floor mode door actuator harness and power seat switch.
1992GMCK2500N/A
1992GMCK2500N/ARear window defogger module connector compatible with rear HVAC floor mode door actuator harness and power seat switch.
1992GMCK2500 SuburbanN/ARear window defogger module connector compatible with rear HVAC floor mode door actuator harness and power seat switch.
1992GMCK3500N/A
1992GMCK3500N/ARear window defogger module connector compatible with rear HVAC floor mode door actuator harness and power seat switch.
1992GMCYukonN/ARear window defogger module connector compatible with rear HVAC floor mode door actuator harness and power seat switch.
1992OldsmobileCutlass SupremeN/A
1992PontiacBonnevilleN/A
1992PontiacFirebirdN/A
1992PontiacGrand PrixN/A
1991BuickRegalN/A
1991ChevroletBlazerN/ARear window defogger module connector compatible with rear HVAC floor mode door actuator harness and power seat switch.
1991ChevroletC1500N/A
1991ChevroletC1500N/ARear window defogger module connector compatible with rear HVAC floor mode door actuator harness and power seat switch.
1991ChevroletC2500N/A
1991ChevroletC2500N/ARear window defogger module connector compatible with rear HVAC floor mode door actuator harness and power seat switch.
1991ChevroletC3500N/A
1991ChevroletC3500N/ARear window defogger module connector compatible with rear HVAC floor mode door actuator harness and power seat switch.
1991ChevroletG10N/AGray; 1 Term. Female
1991ChevroletG10N/A
1991ChevroletG10N/ARear window defogger module connector compatible with rear HVAC floor mode door actuator harness and power seat switch.
1991ChevroletG20N/AGray; 1 Term. Female
1991ChevroletG20N/A
1991ChevroletG20N/ARear window defogger module connector compatible with rear HVAC floor mode door actuator harness and power seat switch.
1991ChevroletG30N/AGray; 1 Term. Female
1991ChevroletG30N/A
1991ChevroletG30N/ARear window defogger module connector compatible with rear HVAC floor mode door actuator harness and power seat switch.
1991ChevroletK1500N/A
1991ChevroletK1500N/ARear window defogger module connector compatible with rear HVAC floor mode door actuator harness and power seat switch.
1991ChevroletK2500N/A
1991ChevroletK2500N/ARear window defogger module connector compatible with rear HVAC floor mode door actuator harness and power seat switch.
1991ChevroletK3500N/A
1991ChevroletK3500N/ARear window defogger module connector compatible with rear HVAC floor mode door actuator harness and power seat switch.
1991ChevroletLuminaN/A
1991ChevroletLumina APVN/A
1991GMCC1500N/A
1991GMCC2500N/A
1991GMCC3500N/A
1991GMCG1500N/AGray; 1 Term. Female
1991GMCG1500N/A
1991GMCG2500N/AGray; 1 Term. Female
1991GMCG2500N/A
1991GMCG3500N/AGray; 1 Term. Female
1991GMCG3500N/A
1991GMCK1500N/A
1991GMCK2500N/A
1991GMCK3500N/A
1991OldsmobileCutlass SupremeN/A
1991Pontiac6000N/A
1991PontiacBonnevilleN/A
1991PontiacGrand PrixN/A
1991PontiacTempestN/A
1990BuickRegalN/A
1990BuickSkylarkN/A
1990ChevroletBlazerN/ARear window defogger module connector compatible with rear HVAC floor mode door actuator harness and power seat switch.
1990ChevroletC1500N/A
1990ChevroletC1500N/ARear window defogger module connector compatible with rear HVAC floor mode door actuator harness and power seat switch.
1990ChevroletC2500N/A
1990ChevroletC2500N/ARear window defogger module connector compatible with rear HVAC floor mode door actuator harness and power seat switch.
1990ChevroletC3500N/A
1990ChevroletC3500N/ARear window defogger module connector compatible with rear HVAC floor mode door actuator harness and power seat switch.
1990ChevroletCamaroN/A
1990ChevroletG10N/A
1990ChevroletG10N/ARear window defogger module connector compatible with rear HVAC floor mode door actuator harness and power seat switch.
1990ChevroletG20N/A
1990ChevroletG20N/ARear window defogger module connector compatible with rear HVAC floor mode door actuator harness and power seat switch.
1990ChevroletG30N/A
1990ChevroletG30N/ARear window defogger module connector compatible with rear HVAC floor mode door actuator harness and power seat switch.
1990ChevroletK1500N/A
1990ChevroletK1500N/ARear window defogger module connector compatible with rear HVAC floor mode door actuator harness and power seat switch.
1990ChevroletK2500N/A
1990ChevroletK2500N/ARear window defogger module connector compatible with rear HVAC floor mode door actuator harness and power seat switch.
1990ChevroletK3500N/A
1990ChevroletK3500N/ARear window defogger module connector compatible with rear HVAC floor mode door actuator harness and power seat switch.
1990ChevroletLuminaN/A
1990ChevroletS10N/AGray; 1 Term. Female; Rear
1990GMCC1500N/ARear window defogger module connector compatible with rear HVAC floor mode door actuator harness and power seat switch.
1990GMCC2500N/ARear window defogger module connector compatible with rear HVAC floor mode door actuator harness and power seat switch.
1990GMCC3500N/ARear window defogger module connector compatible with rear HVAC floor mode door actuator harness and power seat switch.
1990GMCG1500N/A
1990GMCG2500N/A
1990GMCG3500N/A
1990GMCJimmyN/ARear window defogger module connector compatible with rear HVAC floor mode door actuator harness and power seat switch.
1990GMCK1500N/ARear window defogger module connector compatible with rear HVAC floor mode door actuator harness and power seat switch.
1990GMCK2500N/ARear window defogger module connector compatible with rear HVAC floor mode door actuator harness and power seat switch.
1990GMCK3500N/ARear window defogger module connector compatible with rear HVAC floor mode door actuator harness and power seat switch.
1990GMCS15N/AGray; 1 Term. Female; Rear
1990GMCS15 JimmyN/AGray; 1 Term. Female; Rear
1990GMCS15 JimmyN/ARear window defogger module connector compatible with rear HVAC floor mode door actuator harness and power seat switch.
1990OldsmobileCutlass SupremeN/A
1990Pontiac6000N/A
1990PontiacBonnevilleN/A
1990PontiacFirebirdN/A
1990PontiacGrand PrixN/A
1990PontiacTempestN/A
1989ChevroletBlazerN/A
1989ChevroletC1500N/A
1989ChevroletC2500N/A
1989ChevroletC3500N/A
1989ChevroletG10N/A
1989ChevroletG10N/ARear window defogger module connector compatible with rear HVAC floor mode door actuator harness and power seat switch.
1989ChevroletG20N/A
1989ChevroletG20N/ARear window defogger module connector compatible with rear HVAC floor mode door actuator harness and power seat switch.
1989ChevroletG30N/A
1989ChevroletG30N/ARear window defogger module connector compatible with rear HVAC floor mode door actuator harness and power seat switch.
1989ChevroletK1500N/A
1989ChevroletK2500N/A
1989ChevroletK3500N/A
1989ChevroletR1500 SuburbanN/A
1989ChevroletR2500N/A
1989ChevroletR2500 SuburbanN/A
1989ChevroletR3500N/A
1989ChevroletS10N/AGray; 1 Term. Female; Rear
1989ChevroletV1500 SuburbanN/A
1989ChevroletV2500 SuburbanN/A
1989ChevroletV3500N/A
1989GMCC1500N/A
1989GMCC2500N/A
1989GMCC3500N/A
1989GMCG1500N/A
1989GMCG2500N/A
1989GMCG3500N/A
1989GMCJimmyN/A
1989GMCK1500N/A
1989GMCK2500N/A
1989GMCK3500N/A
1989GMCR1500 SuburbanN/A
1989GMCR2500N/A
1989GMCR2500 SuburbanN/A
1989GMCR3500N/A
1989GMCS15N/AGray; 1 Term. Female; Rear
1989GMCS15 JimmyN/AGray; 1 Term. Female; Rear
1989GMCS15 JimmyN/A
1989GMCV1500 SuburbanN/A
1989GMCV2500 SuburbanN/A
1989GMCV3500N/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:

121173531P1255350-33157-4702623EC137PT5629PTA1746

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