Dorman 599-120 Transmission Control Module

Dorman 599-120 Transmission Control Module

Dorman 599-120 is a remanufactured transmission control module for specified GM and related applications. It is fully tested and validated to match the function and performance of the original TCM on the listed vehicles, with a standard replacement design and a 49-pin connector configuration.

Key Features

• Remanufactured transmission control module for electronic transmission management
• Fully tested and validated against original module function and performance
• 49-pin connector/terminal configuration
• Standard replacement grade for direct service use
• Compact module size: 4.5 in. long, 4 in. wide, 1.5 in. high
• Cross-references OE part numbers 24226863 and 24252114 for the same application

Detailed Description

This Dorman transmission control module, part number 599-120, is built for vehicles that rely on electronic transmission control for shift timing and drivability. It is a remanufactured unit that has been tested to verify proper operation and performance on the specified applications, making it a practical replacement for a failed original TCM. Compatible With 2007-2013 Chevrolet Silverado 1500, 2007-2013 GMC Sierra 1500, and other listed GM platforms including Chevrolet Colorado, GMC Canyon, Buick Lucerne, Cadillac DTS, Chevrolet Impala, and Chevrolet Malibu.

Fits 2007-2013 Chevrolet Silverado 1500, N/A. Fits 2007-2013 GMC Sierra 1500, N/A. Fits 2006-2012 Chevrolet Colorado, N/A. Fits 2006-2012 GMC Canyon, N/A. Fits 2006-2011 Buick Lucerne, N/A. Fits 2006-2011 Cadillac DTS, N/A. Fits 2011 Chevrolet Express 1500, N/A. Fits 2006-2011 Chevrolet HHR, N/A. Fits 2006-2011 Chevrolet Impala, N/A. Fits 2011 GMC Savana 1500, N/A. Fits 2005-2010 Chevrolet Cobalt, N/A. Fits 2006-2010 Chevrolet Malibu, N/A. Fits 2007-2010 GMC Sierra, N/A. Fits 2008-2010 Hummer H3, N/A. Fits 2009-2010 Hummer H3T, N/A. Fits 2007-2010 Pontiac G5, N/A. Fits 2007-2010 Saturn Vue, N/A. Fits 2006-2009 Buick LaCrosse, N/A. Fits 2006-2009 Chevrolet Express 3500, N/A. Fits 2007-2009 Chevrolet Tahoe, N/A. Fits 2006-2009 Chevrolet Trailblazer, N/A. Fits 2006-2009 GMC Envoy, N/A. Fits 2007-2009 GMC Yukon, N/A. Fits 2007-2009 Saturn Aura, N/A. Fits 2007-2008 Chevrolet Avalanche, N/A. Fits 2007-2008 GMC Yukon XL 1500, N/A. Fits 2006-2008 Isuzu Ascender, N/A. Fits 2008 Isuzu i-290, N/A. Fits 2006-2008 Pontiac Grand Prix, N/A. Fits 2006-2007 Buick Terraza, N/A. Fits 2006-2007 Chevrolet Express 2500, N/A. Fits 2006-2007 Chevrolet Monte Carlo, N/A. Fits 2006-2007 GMC Savana 2500, N/A. Fits 2006-2007 GMC Savana 3500, N/A. Fits 2006-2007 Saturn Ion, N/A. Fits 2006-2007 Saturn Relay, N/A. Fits 2006 Buick Rendezvous, N/A. Fits 2006 Chevrolet Trailblazer EXT, N/A. Fits 2006 GMC Envoy XL, N/A. Fits 2006 Pontiac GTO, N/A. Fits 2006 Pontiac Montana, N/A. Fits 2006 Pontiac Pursuit, N/A. Fits 2005 Chevrolet Corvette, N/A. Fits 2005 Chevrolet SSR, N/A.

Common Problems This Module Can Address

• Transmission warning lights or control module fault codes
• Harsh, delayed, or inconsistent shifting
• No-start or limp-mode conditions related to TCM failure
• Communication issues between the transmission and vehicle electronics
• Drivability concerns caused by a failing original module

Installation Notes and Tips

Verify the connector count and OE part number before installation to confirm application match. After installation, follow the vehicle-specific relearn, programming, or initialization steps required for the transmission control system. Inspect related wiring, grounds, and connectors during service to avoid repeat faults.

Quality Assurance

Dorman validates this remanufactured transmission control module to match original function and performance on the listed applications. The part number 599-120 is built as a standard replacement for service on the specified Chevrolet, GMC, Buick, Cadillac, Pontiac, Saturn, Hummer, and Isuzu vehicles.