Dorman 645-131 Turn Signal / Parking Light Connector

Turn Signal Connector for OE-Style Repair

Dorman 645-131 is a turn signal / parking light connector built to match the original hardware used on select Chevrolet, GMC, Buick, and Hummer applications. It uses a black oval housing with a 3-terminal female layout, 14-gauge wiring, and a 15.8 in. pigtail for a direct electrical repair.

For owners servicing a Chevrolet Express, GMC Savana, or Buick LaCrosse lighting circuit, this connector restores a secure connection at the turn signal or parking light harness. Dorman 645-131 is made with brass and nylon materials and is water resistant for dependable underhood or front-end use.

Key Features

• OE-style turn signal / parking light connector for electrical repair
• Black oval connector body with 3-terminal female configuration
• 14-gauge wire harness with 15.8 in. lead length
• Brass and nylon construction for durability
• Water resistant design for exposed vehicle lighting circuits
• Fits select Chevrolet Express 1500, 2500, and 3500 models
• Fits select GMC Savana 1500, 2500, and 3500 models
• Also fits select Buick LaCrosse, Buick Allure, Hummer H3, Chevrolet P30, and GMC P3500 applications

Detailed Description

This Dorman electrical connector is engineered to match the appearance and function of the original turn signal / parking light connector on specified vehicles. The 3-way female terminal design, blade-style terminals, and oval black housing support a clean repair when the factory connector is heat-damaged, corroded, or broken. Dorman 645-131 is a practical replacement for front lighting harness service on 2003-2020 Chevrolet Express and GMC Savana vans, plus select Buick, Hummer, and GM truck applications.

This part cross-references GM OE numbers 12085492 and 88862224 for the same application.

Common Repair Uses

• Broken or cracked turn signal connector housing
• Corroded terminals causing intermittent lighting operation
• Heat-damaged parking light or signal lamp wiring
• Loose electrical connection at the front lamp harness
• Restoring proper signal or parking light function after connector failure

Installation Notes and Tips

Verify connector shape, terminal count, and wire configuration before installation. Match the existing harness wiring carefully, and inspect the lamp socket and surrounding wiring for heat damage or corrosion before splicing. This connector includes a pigtail lead for wiring repair on the vehicle side.

Compatible With 2003-2020 Chevrolet Express 2500 and Express 3500, 2003-2014 Chevrolet Express 1500, 2003-2020 GMC Savana 2500 and Savana 3500, 2003-2014 GMC Savana 1500, 2005-2008 Buick Allure, 2006-2008 Buick LaCrosse, 2006-2008 Hummer H3, 2005 Buick LaCrosse, 1997-1999 Chevrolet P30, and 1997-1999 GMC P3500.

Quality Assurance

Dorman designs this connector to follow the original fit and function expected for the listed applications. The brass, nylon, and water-resistant construction support reliable electrical performance in lighting repairs.