Pioneer Cables 772038 Automatic Transmission Wiring Harness

Automatic Transmission Wiring Harness for OE Fit

Pioneer Cables 772038 is an automatic transmission wiring harness built as an exact-fit replacement for a wide range of GM trucks, vans, SUVs, and select luxury applications. It is used in internal transmission service where reliable electrical connections are critical for shift control and transmission operation.

• Exact-fit replacement automatic transmission wiring harness
• Compatible with internal transmission applications
• Fits many Chevrolet Silverado, GMC Sierra, Express, and Savana models
• Also listed for Cadillac Escalade, Hummer H1, and select Bentley and Rolls-Royce applications
• Cross-references Pioneer Cables 772038 for the same application

Fitment Coverage

• Fits 2004-2006 Chevrolet Express 2500, internal
• Fits 2004-2006 Chevrolet Express 3500, internal
• Fits 2004-2006 Chevrolet Silverado 1500, internal
• Fits 2005-2006 Chevrolet Silverado 1500 HD, internal
• Fits 2004-2006 Chevrolet Silverado 2500 HD, internal
• Fits 2004-2006 Chevrolet Silverado 3500, internal
• Fits 2004-2006 Chevrolet Suburban 2500, internal
• Fits 2004-2006 GMC Savana 2500, internal
• Fits 2004-2006 GMC Savana 3500, internal
• Fits 2004-2006 GMC Sierra 1500, internal
• Fits 2005-2006 GMC Sierra 1500 HD, internal
• Fits 2004-2006 GMC Sierra 2500 HD, internal
• Fits 2004-2006 GMC Sierra 3500, internal
• Fits 2004 Chevrolet Silverado 2500, internal
• Fits 2004 GMC Sierra 2500, internal
• Fits 2004 GMC Yukon XL 2500, internal
• Fits 2004 Hummer H1, internal

Detailed Description

Pioneer Cables 772038 transmission harness is engineered for direct replacement service on vehicles that use an internal automatic transmission wiring harness. It supports a broad range of applications, including 2004-2006 Chevrolet Silverado and GMC Sierra trucks, 2004-2006 Chevrolet Express and GMC Savana vans, and select Cadillac Escalade, Hummer H1, Bentley, and Rolls-Royce models. The part number 772038 is also referenced in interchange listings for service matching.

Common Repair Uses

• Restores damaged or broken transmission wiring
• Addresses intermittent electrical connection issues inside the transmission
• Helps correct shift-control communication faults
• Replaces worn OE-style harness routing in internal transmission service
• Supports repair of transmission-related electrical faults on Silverado, Sierra, and Express/Savana platforms

Installation Notes and Tips

Install only after confirming the transmission application and connector layout against the vehicle’s original harness. Because this is an internal transmission component, clean work practices and careful routing are important during service. Verify fitment by year, make, model, and transmission configuration before installation.

Quality Assurance

Pioneer Transmission Components are positioned as exact-fit replacement parts for direct service use. This harness is built to match the intended OE-style application for the listed vehicles.