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Dorman 599-105 Transfer Case Control ModuleOE Quality 60-Day Returns
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Part #: 599-105

Dorman 599-105 Transfer Case Control Module

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⚙️ 48 vehicles fit this part
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Select your vehicle to confirm fitment
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✅OE Direct Replacement — Bolt-on fit, no modifications needed
🚗Fitment: Cadillac, Chevrolet, and GMC, Escalade, Escalade EXT, Avalanche 1500, Avalanche 2500, Silverado 1500, Silverado 1500 HD, Silverado 2500, Silverado 2500 HD, Suburban 1500, Suburban 2500, Tahoe, Sierra 1500, Sierra 1500 HD, Sierra 2500, Sierra 2500 HD, Yukon, Yukon XL 1500, and Yukon XL 2500
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Overview of Dorman Transfer Case Control Module 599-105

The Dorman Transfer Case Control Module 599-105 is designed to provide reliable control for the transfer case system in select GM trucks and SUVs. This module features an orange connector and pin-type terminals, ensuring secure and precise electrical connections for optimal performance.

  • Connector color: Orange for easy identification
  • Terminal type: Pin terminals for secure electrical contact
  • Includes one transfer case control module per package
  • Compatible with multiple GM truck and SUV models
  • Part number: 599-105 for accurate replacement

Detailed Product Description

This transfer case control module by Dorman is engineered to meet the specific requirements of transfer case systems in vehicles such as the Chevrolet Silverado 1500 HD, GMC Sierra 2500 HD, Cadillac Escalade EXT, and others. The orange connector color helps technicians quickly identify the module during installation or diagnostics. The pin terminal type ensures a firm and reliable connection to the vehicle’s wiring harness, reducing the risk of electrical faults. The module is supplied as a single unit, ready for direct replacement in compatible vehicles.

Compatible Vehicles and Applications

This transfer case control module 599-105 is compatible with a range of GM vehicles, including:

  • Cadillac Escalade and Escalade EXT
  • Chevrolet Avalanche 1500 and 2500
  • Chevrolet Silverado 1500, 1500 HD, 2500, and 2500 HD
  • Chevrolet Suburban 1500 and 2500
  • Chevrolet Tahoe
  • GMC Sierra 1500, 1500 HD, 2500, and 2500 HD
  • GMC Yukon and Yukon XL 1500 and 2500

Common Issues Addressed by This Module

  • Intermittent or no engagement of the transfer case
  • Failure of the transfer case to shift between 2WD and 4WD modes
  • Warning lights related to transfer case control on the dashboard
  • Erratic or delayed transfer case response
  • Electrical connection problems due to worn or damaged terminals

Installation Notes and Tips

  • Ensure the vehicle’s battery is disconnected before installation to prevent electrical shorts
  • Verify the orange connector is fully seated and locked into place
  • Inspect wiring harness and terminals for damage or corrosion prior to installation
  • Use the OEM part number 599-105 to confirm compatibility with your vehicle
  • Follow manufacturer torque specifications when securing the module

Quality Assurance and Warranty

Dorman transfer case control modules are manufactured to meet or exceed OEM standards for fit, form, and function. Each unit undergoes rigorous testing to ensure durability and reliable operation under normal driving conditions. The 599-105 part is backed by Dorman’s limited warranty, providing coverage against defects in materials and workmanship for a specified period. Refer to Dorman’s warranty documentation for detailed terms and conditions.

BrandDorman
Part Number599-105
Connector ColorOrange
Package ContentsTransfer Case Control Module
Terminal TypePin

This part fits 48 vehicles. Search below:

YearMakeModelDrive TypeLitersCylindersPositionNotes
2002CadillacEscaladeAWDN/AActive; w/RPO Code NP8 (2 Speed, Push Button Shift, Transfer Case)
2002CadillacEscalade EXTAWDN/AFits vehicles with RPO Code NP8 for 2 Speed Push Button Shift Transfer Case.
2002ChevroletAvalanche 15004WDN/AActive; w/RPO Code NP8 (2 Speed, Push Button Shift, Transfer Case)
2002ChevroletAvalanche 25004WDN/AActive; w/RPO Code NP8 (2 Speed, Push Button Shift, Transfer Case)
2002ChevroletSilverado 15004WDN/AActive; w/RPO Code NP8 (2 Speed, Push Button Shift, Transfer Case)
2002ChevroletSilverado 1500 HD4WDN/AActive; w/RPO Code NP8 (2 Speed, Push Button Shift, Transfer Case)
2002ChevroletSilverado 25004WDN/AActive; w/RPO Code NP8 (2 Speed, Push Button Shift, Transfer Case)
2002ChevroletSilverado 2500 HD4WDN/AActive; w/RPO Code NP8 (2 Speed, Push Button Shift, Transfer Case)
2002ChevroletSuburban 15004WDN/AActive; w/RPO Code NP8 (2 Speed, Push Button Shift, Transfer Case)
2002ChevroletSuburban 25004WDN/AActive; w/RPO Code NP8 (2 Speed, Push Button Shift, Transfer Case)
2002ChevroletTahoe4WDN/AActive; w/RPO Code NP8 (2 Speed, Push Button Shift, Transfer Case)
2002GMCSierra 15004WDN/AActive; w/RPO Code NP8 (2 Speed, Push Button Shift, Transfer Case)
2002GMCSierra 1500 HD4WDN/AActive; w/RPO Code NP8 (2 Speed, Push Button Shift, Transfer Case)
2002GMCSierra 25004WDN/AActive; w/RPO Code NP8 (2 Speed, Push Button Shift, Transfer Case)
2002GMCSierra 2500 HD4WDN/AActive; w/RPO Code NP8 (2 Speed, Push Button Shift, Transfer Case)
2002GMCYukon4WDN/AActive; w/RPO Code NP8 (2 Speed, Push Button Shift, Transfer Case)
2002GMCYukon XL 15004WDN/AActive; w/RPO Code NP8 (2 Speed, Push Button Shift, Transfer Case)
2002GMCYukon XL 25004WDN/AActive; w/RPO Code NP8 (2 Speed, Push Button Shift, Transfer Case)
2001ChevroletSilverado 15004WDN/AActive; w/RPO Code NP8 (2 Speed, Push Button Shift, Transfer Case)
2001ChevroletSilverado 1500 HD4WDN/AActive; w/RPO Code NP8 (2 Speed, Push Button Shift, Transfer Case)
2001ChevroletSilverado 25004WDN/AActive; w/RPO Code NP8 (2 Speed, Push Button Shift, Transfer Case)
2001ChevroletSilverado 2500 HD4WDN/AActive; w/RPO Code NP8 (2 Speed, Push Button Shift, Transfer Case)
2001ChevroletSuburban 15004WDN/AActive; w/RPO Code NP8 (2 Speed, Push Button Shift, Transfer Case)
2001ChevroletSuburban 25004WDN/AActive; w/RPO Code NP8 (2 Speed, Push Button Shift, Transfer Case)
2001ChevroletTahoe4WDN/AActive; w/RPO Code NP8 (2 Speed, Push Button Shift, Transfer Case)
2001GMCSierra 15004WDN/AActive; w/RPO Code NP8 (2 Speed, Push Button Shift, Transfer Case)
2001GMCSierra 1500 HD4WDN/AActive; w/RPO Code NP8 (2 Speed, Push Button Shift, Transfer Case)
2001GMCSierra 25004WDN/AActive; w/RPO Code NP8 (2 Speed, Push Button Shift, Transfer Case)
2001GMCSierra 2500 HD4WDN/AActive; w/RPO Code NP8 (2 Speed, Push Button Shift, Transfer Case)
2001GMCYukon4WDN/AActive; w/RPO Code NP8 (2 Speed, Push Button Shift, Transfer Case)
2001GMCYukon XL 15004WDN/AActive; w/RPO Code NP8 (2 Speed, Push Button Shift, Transfer Case)
2001GMCYukon XL 25004WDN/AActive; w/RPO Code NP8 (2 Speed, Push Button Shift, Transfer Case)
2000ChevroletSilverado 15004WDN/AActive; w/RPO Code NP8 (2 Speed, Push Button Shift, Transfer Case)
2000ChevroletSilverado 25004WDN/AActive; w/RPO Code NP8 (2 Speed, Push Button Shift, Transfer Case)
2000ChevroletSuburban 15004WDN/AActive; w/RPO Code NP8 (2 Speed, Push Button Shift, Transfer Case)
2000ChevroletSuburban 25004WDN/AActive; w/RPO Code NP8 (2 Speed, Push Button Shift, Transfer Case)
2000ChevroletTahoe4WD5.3LV8N/AActive; w/RPO Code NP8 (2 Speed, Push Button Shift, Transfer Case)
2000ChevroletTahoe4WD4.8LV8N/AActive; w/RPO Code NP8 (2 Speed, Push Button Shift, Transfer Case)
2000GMCSierra 15004WDN/AActive; w/RPO Code NP8 (2 Speed, Push Button Shift, Transfer Case)
2000GMCSierra 25004WDN/AActive; w/RPO Code NP8 (2 Speed, Push Button Shift, Transfer Case)
2000GMCYukon4WD5.3LV8N/AActive; w/RPO Code NP8 (2 Speed, Push Button Shift, Transfer Case)
2000GMCYukon4WD4.8LV8N/AActive; w/RPO Code NP8 (2 Speed, Push Button Shift, Transfer Case)
2000GMCYukon XL 15004WDN/AActive; w/RPO Code NP8 (2 Speed, Push Button Shift, Transfer Case)
2000GMCYukon XL 25004WDN/AActive; w/RPO Code NP8 (2 Speed, Push Button Shift, Transfer Case)
1999ChevroletSilverado 15004WDN/AActive; w/RPO Code NP8 (2 Speed, Push Button Shift, Transfer Case)
1999ChevroletSilverado 25004WDN/AActive; w/RPO Code NP8 (2 Speed, Push Button Shift, Transfer Case)
1999GMCSierra 15004WDN/AActive; w/RPO Code NP8 (2 Speed, Push Button Shift, Transfer Case)
1999GMCSierra 25004WDN/AActive; w/RPO Code NP8 (2 Speed, Push Button Shift, Transfer Case)

* 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:

1257741073-42104TCCM10TCCM10M

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

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