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Part #: 599-120

Dorman 599-120 Transmission Control Module

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⚙️ 184 vehicles fit this part
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🚗Fitment: Chevrolet, GMC, Buick, Cadillac, Hummer, Pontiac, Saturn, and Isuzu, Silverado 1500, Sierra 1500, Colorado, Canyon, Lucerne, DTS, Express 1500, HHR, Impala, Savana 1500, Cobalt, Malibu, Sierra, H3, H3T, G5, Vue, LaCrosse, Express 3500, Tahoe, Trailblazer, Envoy, Yukon, Aura, Avalanche, Yukon XL 1500, Ascender, i-290, Grand Prix, Terraza, Express 2500, Monte Carlo, Savana 2500, Savana 3500, Ion, Relay, Rendezvous, Trailblazer EXT, Envoy XL, GTO, Montana, Pursuit, and Corvette
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Reliable Transmission Control Module for Select GM Vehicles

The Dorman 599-120 Transmission Control Module is a remanufactured replacement designed to restore proper transmission function in various Buick, Cadillac, Chevrolet, GMC, Hummer, Isuzu, Pontiac, and Saturn models. Engineered with a 49-pin connector configuration, this module ensures compatibility and reliable communication with your vehicle's transmission system.

  • Standard replacement grade for dependable performance
  • 49-pin connector/terminal configuration for precise fit
  • Compact dimensions: 4.5 inches length, 4 inches width, 1.5 inches height
  • Remanufactured module included in package
  • Compatible with multiple GM makes and models including Chevrolet Silverado 1500, GMC Sierra, Cadillac DTS, and more

Product Details and Specifications

The Dorman 599-120 Transmission Control Module is designed to meet OEM specifications for a wide range of General Motors vehicles. Its 49-pin connector ensures seamless integration with the vehicle’s wiring harness, facilitating accurate transmission control and communication. The module’s compact size (4.5" L x 4" W x 1.5" H) allows for straightforward installation in the designated control module location. This remanufactured unit undergoes rigorous testing to ensure functionality and reliability comparable to the original part.

Compatible Vehicles and Applications

This transmission control module is compatible with numerous GM models, including but not limited to:

  • Buick LaCrosse, Lucerne, Rendezvous
  • Cadillac DTS
  • Chevrolet Avalanche, Cobalt, Colorado, Corvette, Express 1500/2500/3500, G5, Impala, Malibu, Monte Carlo, Silverado 1500, SSR, Tahoe
  • GMC Canyon, Envoy, Envoy XL, Sierra, Sierra 1500, Yukon, Yukon XL 1500
  • Hummer H3, H3T
  • Isuzu i-290
  • Pontiac Aura, G5, Grand Prix, GTO
  • Saturn Ion, Vue

Common Issues Addressed by This Module

  • Erratic or harsh shifting in automatic transmissions
  • Transmission slipping or failure to engage gears properly
  • Check engine light related to transmission control faults
  • Loss of communication between transmission and vehicle computer
  • Failure of transmission to shift into correct gear ranges

Installation Notes and Tips

Installation of the Dorman 599-120 Transmission Control Module requires basic automotive electrical knowledge and tools. Ensure the vehicle battery is disconnected before beginning installation to prevent electrical shorts. Verify the 49-pin connector matches the vehicle harness before securing the module. After installation, clear any diagnostic trouble codes and perform a transmission relearn procedure if necessary to restore optimal shifting performance.

Quality Assurance and Warranty

This remanufactured transmission control module is tested to meet or exceed OEM standards for performance and durability. Dorman provides a limited warranty on this part, covering defects in materials and workmanship under normal use. Refer to the warranty documentation for specific terms and conditions.

BrandDorman
Part Number599-120
Connector/Terminal Configuration49 Pin
Item GradeStandard Replacement
Module Height (in)1.5 in
Module Length (In)4.5 in
Module Width (in)4 in
Package Contents1 Remanufactured Transmission Control Module

This part fits 184 vehicles. Search below:

YearMakeModelSubmodelLitersCylindersPositionNotes
2013ChevroletSilverado 1500LTN/A
2013ChevroletSilverado 1500WTN/A
2013ChevroletSilverado 1500LSN/A
2013GMCSierra 1500SLN/A
2013GMCSierra 1500WTN/A
2013GMCSierra 1500SLEN/A
2012ChevroletColoradoN/A
2012ChevroletSilverado 1500BaseN/A
2012ChevroletSilverado 1500LTN/A
2012ChevroletSilverado 1500WTN/A
2012ChevroletSilverado 1500LSN/A
2012GMCCanyonN/A
2012GMCSierra 1500SLN/A
2012GMCSierra 1500WTN/A
2012GMCSierra 1500SLEN/A
2011BuickLucerneN/A
2011CadillacDTSN/A
2011ChevroletColoradoN/A
2011ChevroletExpress 15005.3LV8N/A
2011ChevroletExpress 15004.3LV6N/A
2011ChevroletHHRN/A
2011ChevroletImpalaN/A
2011ChevroletSilverado 1500BaseN/A
2011ChevroletSilverado 1500LTN/A
2011ChevroletSilverado 1500WTN/A
2011ChevroletSilverado 1500LSN/A
2011GMCCanyonN/A
2011GMCSavana 15005.3LV8N/A
2011GMCSavana 15004.3LV6N/A
2011GMCSierra 1500SLN/A
2011GMCSierra 1500WTN/A
2011GMCSierra 1500SLEN/A
2010BuickLucerneN/A
2010CadillacDTSN/A
2010ChevroletCobaltN/A
2010ChevroletColoradoN/A
2010ChevroletHHRN/A
2010ChevroletImpalaN/A
2010ChevroletMalibuN/A
2010ChevroletSilverado 1500BaseN/A
2010ChevroletSilverado 1500LTN/A
2010ChevroletSilverado 1500WTN/A
2010ChevroletSilverado 1500LSN/A
2010GMCCanyonN/A
2010GMCSierraN/A
2010GMCSierra 1500SLN/A
2010GMCSierra 1500WTN/A
2010GMCSierra 1500SLEN/A
2010HummerH3N/A
2010HummerH3TN/A
2010PontiacG5N/A
2010SaturnVueN/A
2009BuickLaCrosse5.3LV8N/A
2009BuickLucerneN/A
2009CadillacDTSN/A
2009ChevroletCobaltN/A
2009ChevroletColoradoN/A
2009ChevroletExpress 3500N/A
2009ChevroletHHRN/A
2009ChevroletImpalaN/A
2009ChevroletMalibuN/A
2009ChevroletSilverado 1500BaseN/A
2009ChevroletSilverado 1500LTN/A
2009ChevroletSilverado 1500WTN/A
2009ChevroletSilverado 1500LTZN/A
2009ChevroletSilverado 1500LSN/A
2009ChevroletTahoeZ71N/A
2009ChevroletTahoeLSN/A
2009ChevroletTrailblazerN/A
2009GMCCanyonN/A
2009GMCEnvoyN/A
2009GMCSierraN/A
2009GMCSierra 1500SLN/A
2009GMCSierra 1500SLTN/A
2009GMCSierra 1500WTN/A
2009GMCSierra 1500SLEN/A
2009GMCYukonBaseN/A
2009GMCYukonSLEN/A
2009HummerH3N/A
2009HummerH3TN/A
2009PontiacG5N/A
2009SaturnAuraN/A
2009SaturnVueN/A
2008BuickLaCrosse5.3LV8N/A
2008BuickLaCrosse3.6LV6N/A
2008BuickLucerneN/A
2008CadillacDTSN/A
2008ChevroletAvalancheN/A
2008ChevroletCobaltN/A
2008ChevroletColoradoN/A
2008ChevroletExpress 3500N/A
2008ChevroletHHRN/A
2008ChevroletImpalaN/A
2008ChevroletMalibuN/A
2008ChevroletSilverado 1500BaseN/A
2008ChevroletSilverado 1500LTN/A
2008ChevroletSilverado 1500WTN/A
2008ChevroletSilverado 1500LTZN/A
2008ChevroletSilverado 1500LSN/A
2008ChevroletTahoeBaseN/A
2008ChevroletTahoeLTN/A
2008ChevroletTahoeZ71N/A
2008ChevroletTahoeLTZN/A
2008ChevroletTahoeLSN/A
2008ChevroletTrailblazerN/A
2008GMCCanyonN/A
2008GMCEnvoyN/A
2008GMCSierraN/A
2008GMCSierra 1500SLN/A
2008GMCSierra 1500SLTN/A
2008GMCSierra 1500WTN/A
2008GMCSierra 1500SLEN/A
2008GMCYukonBaseN/A
2008GMCYukonSLTN/A
2008GMCYukonSLEN/A
2008GMCYukon XL 1500N/A
2008HummerH3N/A
2008IsuzuAscenderN/A
2008Isuzui-290N/A
2008PontiacG5N/A
2008PontiacGrand Prix5.3LV8N/A
2008SaturnAuraN/A
2008SaturnVueN/A
2007BuickLaCrosse3.6LV6N/A
2007BuickLucerne4.6LV8N/A
2007BuickTerrazaN/A
2007CadillacDTSN/A
2007ChevroletAvalancheN/A
2007ChevroletCobaltN/A
2007ChevroletColoradoN/A
2007ChevroletExpress 25006.6LV8N/A
2007ChevroletExpress 35006.6LV8N/A
2007ChevroletHHRN/A
2007ChevroletImpalaN/A
2007ChevroletMalibuN/A
2007ChevroletMonte CarloN/A
2007ChevroletSilverado 1500N/A
2007ChevroletTahoeN/A
2007ChevroletTrailblazerN/A
2007GMCCanyonN/A
2007GMCEnvoyN/A
2007GMCSavana 25006.6LV8N/A
2007GMCSavana 35006.6LV8N/A
2007GMCSierraN/A
2007GMCSierra 1500N/A
2007GMCYukonSLTN/A
2007GMCYukon XL 1500N/A
2007IsuzuAscenderN/A
2007PontiacG5N/A
2007PontiacGrand Prix5.3LV8N/A
2007SaturnAuraN/A
2007SaturnIonN/A
2007SaturnRelayN/A
2007SaturnVueN/A
2006BuickLaCrosse3.6LV6N/A
2006BuickLucerne4.6LV8N/A
2006BuickRendezvous3.6LV6N/A
2006BuickTerrazaN/A
2006CadillacDTSN/A
2006ChevroletCobaltN/A
2006ChevroletColoradoN/A
2006ChevroletExpress 25006.6LV8N/A
2006ChevroletExpress 35006.6LV8N/A
2006ChevroletHHRN/A
2006ChevroletImpalaN/A
2006ChevroletMalibuN/A
2006ChevroletMonte CarloN/A
2006ChevroletTrailblazerN/A
2006ChevroletTrailblazer EXTN/A
2006GMCCanyonN/A
2006GMCEnvoyN/A
2006GMCEnvoy XLN/A
2006GMCSavana 25006.6LV8N/A
2006GMCSavana 35006.6LV8N/A
2006IsuzuAscenderN/A
2006PontiacGrand Prix5.3LV8N/A
2006PontiacGTON/A
2006PontiacMontanaN/A
2006PontiacPursuitN/A
2006SaturnIonN/A
2006SaturnRelayN/A
2005ChevroletCobaltN/A
2005ChevroletCorvetteN/A
2005ChevroletSSRN/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:

2422686324252114

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