Standard Ignition S-1265 Fuel Tank Harness Connector

Fuel Tank Harness Connector for GM Applications

Standard Ignition S-1265 is a fuel tank harness connector built for electrical repair work where the original connector has failed, overheated, or lost terminal integrity. It uses high-grade materials to support strong conductivity and reliable pin-to-socket contact across a wide range of GM vehicles.

Compatible With Buick Enclave, Chevrolet Silverado 1500, GMC Sierra 1500, Cadillac Escalade, and other GM models listed below, this Standard Ignition S-1265 connector is a direct-fit electrical repair solution for fuel tank harness service.

• Male connector with female pin socket terminals
• 4-terminal, 4-wire design for fuel tank harness repair
• 16-inch harness length for service-side replacement work
• Includes butt splices for wire repair connections
• Built for consistent conductivity and secure electrical contact
• Cross-references Dorman TECHoice 645-221 for the same application

Detailed Product Overview

Standard Ignition S-1265 is engineered as a replacement fuel tank harness connector for GM platforms that use a 4-terminal female socket layout. The connector is designed to restore proper electrical connection at the fuel tank harness when the original plug, terminals, or wiring interface are damaged. This part number is commonly searched for GM fuel tank harness connector repair on Chevrolet Silverado 1500, GMC Sierra 1500, Buick Enclave, and Cadillac Escalade applications.

Standard Ignition backs this connector with decades of electrical parts development focused on technician needs and failure-prone OE connector repairs. The S-1265 is a practical choice when the original connector no longer maintains a stable connection at the fuel tank harness.

Common Problems This Part Can Address

• Broken or heat-damaged fuel tank harness connector housing
• Intermittent electrical connection at the fuel tank circuit
• Corroded or loose terminal contact
• Wiring repair needs after connector failure
• Fuel system electrical faults caused by damaged pigtail wiring

Installation Notes and Tips

Verify connector gender, terminal style, and wire count before installation. This part uses a male connector with female pin socket terminals and a 4-wire layout, so matching the OE configuration is important for proper fitment. Use the included butt splices to complete the wire repair, and confirm the harness routing and connector orientation before final assembly.

Fitment includes many GM vehicles from 1997 through 2017, including Chevrolet Express, Silverado, Tahoe, Impala, GMC Savana, Sierra, Yukon, Cadillac Escalade, Buick Enclave, and related models. For some applications, notes such as rear position or black 4-terminal female configuration apply and should be matched to the vehicle’s original connector.

Quality Assurance

Standard Ignition manufactures pigtails and sockets using high-grade materials to support peak conductivity and dependable electrical connections. The S-1265 is part of a long-running electrical connector program developed to address common OE failure points in fuel tank harness repair.