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DormanPart #: 599-114
Dorman 599-114 Transfer Case Control Module
74 vehicles fit this part
Select your vehicle to confirm fitment
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OE Direct Replacement — Bolt-on fit, no modifications needed
Fitment: Chevrolet and GMC, Silverado 1500 Classic, Silverado 1500 HD Classic, Silverado 2500 HD Classic, Silverado 3500 Classic, Sierra 1500 Classic, Sierra 1500 HD Classic, Sierra 2500 HD Classic, Sierra 3500 Classic, Avalanche 1500, Avalanche 2500, Silverado 1500, Silverado 1500 HD, Silverado 2500 HD, Silverado 3500, Suburban 1500, Suburban 2500, Tahoe, Sierra 1500, Sierra 1500 HD, Sierra 2500 HD, Sierra 3500, Yukon, Yukon XL 1500, Yukon XL 2500, Silverado 2500, and Sierra 2500
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Not what you need? See all Transfer Case Control Module options
Transfer Case Control Module for GM 4WD Systems
Restore transfer case operation with this Dorman transfer case control module, Part Number 599-114. It replaces the original module on select Chevrolet Silverado, GMC Sierra, Tahoe, Yukon, and Suburban applications with NP8 two-speed push-button shift transfer cases.
- Direct replacement transfer case control module for specific GM trucks and SUVs
- Black connector color with pin terminal type
- Built to provide the same function and performance as the original module
- Fits vehicles equipped with RPO Code NP8 and a four-button selection switch
- Cross-references GM OE part number 12590219 for the same application
Detailed Product Overview
Dorman 599-114 is a replacement transfer case control module for select 2003-2007 Chevrolet and GMC 4WD vehicles. It is used in applications with the NP8 two-speed, push-button shift transfer case and four-button selection switch, including Silverado 1500, Silverado 2500 HD, Silverado 3500, Sierra 1500, Sierra 2500 HD, Sierra 3500, Tahoe, Yukon, Yukon XL, Avalanche, and related Classic models. This module is intended to restore electronic transfer case control when the original unit is no longer operating correctly.
For buyers searching for a transfer case control module for a 2003-2006 Chevrolet Silverado 1500, a 2003-2006 GMC Sierra 2500 HD, or a 2003-2006 GMC Yukon with NP8, this part number 599-114 provides a cost-effective OE-style replacement. It is also listed for 2007 Chevrolet Silverado 1500 Classic and 2007 GMC Sierra 1500 Classic applications with the same transfer case configuration.
Common Problems This Part Can Address
- Transfer case shift buttons do not respond
- 4WD modes do not engage correctly
- Transfer case control module failure or intermittent operation
- Loss of communication between the switch and transfer case system
- Incorrect or inconsistent push-button shift behavior
Installation Notes and Fitment Tips
Verify the vehicle has RPO Code NP8 and a four-button selection switch before ordering. Confirm connector style and terminal type match the original module, and compare the existing part number to Dorman 599-114 and OE reference 12590219. Fits 2003-2006 Chevrolet Silverado 1500, N/A; Fits 2005-2006 Chevrolet Silverado 1500 HD, N/A; Fits 2003-2006 Chevrolet Silverado 2500 HD, N/A; Fits 2003-2006 GMC Sierra 1500, N/A; Fits 2003-2006 GMC Yukon, N/A; Fits 2007 Chevrolet Silverado 1500 Classic, N/A; Fits 2007 GMC Sierra 2500 HD Classic, N/A.
Quality Assurance
Dorman supplies replacement automotive electronics engineered to match the function of the original component on specific vehicles. Part 599-114 is built as a direct-fit replacement for select GM transfer case control applications.
| Brand | Dorman |
|---|---|
| Part Number | 599-114 |
| Connector Color | Black |
| Package Contents | Transfer Case Control Module |
| Terminal Type | Pin |
This part fits 74 vehicles. Search below:
| Year | Make | Model | Drive Type | Position | Notes |
|---|---|---|---|---|---|
| 2007 | Chevrolet | Silverado 1500 Classic | 4WD | N/A | w/RPO Code NP8 (2 Speed, Push Button Shift, Transfer Case); Four Button Selection Switch |
| 2007 | Chevrolet | Silverado 1500 HD Classic | 4WD | N/A | w/RPO Code NP8 (2 Speed, Push Button Shift, Transfer Case); Four Button Selection Switch |
| 2007 | Chevrolet | Silverado 2500 HD Classic | 4WD | N/A | w/RPO Code NP8 (2 Speed, Push Button Shift, Transfer Case); Four Button Selection Switch |
| 2007 | Chevrolet | Silverado 3500 Classic | 4WD | N/A | w/RPO Code NP8 (2 Speed, Push Button Shift, Transfer Case); Four Button Selection Switch |
| 2007 | GMC | Sierra 1500 Classic | 4WD | N/A | w/RPO Code NP8 (2 Speed, Push Button Shift, Transfer Case); Four Button Selection Switch |
| 2007 | GMC | Sierra 1500 HD Classic | 4WD | N/A | w/RPO Code NP8 (2 Speed, Push Button Shift, Transfer Case); Four Button Selection Switch |
| 2007 | GMC | Sierra 2500 HD Classic | 4WD | N/A | w/RPO Code NP8 (2 Speed, Push Button Shift, Transfer Case); Four Button Selection Switch |
| 2007 | GMC | Sierra 3500 Classic | 4WD | N/A | w/RPO Code NP8 (2 Speed, Push Button Shift, Transfer Case); Four Button Selection Switch |
| 2006 | Chevrolet | Avalanche 1500 | 4WD | N/A | w/RPO Code NP8 (2 Speed, Push Button Shift, Transfer Case); Four Button Selection Switch |
| 2006 | Chevrolet | Avalanche 2500 | 4WD | N/A | w/RPO Code NP8 (2 Speed, Push Button Shift, Transfer Case); Four Button Selection Switch |
| 2006 | Chevrolet | Silverado 1500 | 4WD | N/A | w/RPO Code NP8 (2 Speed, Push Button Shift, Transfer Case); Four Button Selection Switch |
| 2006 | Chevrolet | Silverado 1500 HD | 4WD | N/A | w/RPO Code NP8 (2 Speed, Push Button Shift, Transfer Case); Four Button Selection Switch |
| 2006 | Chevrolet | Silverado 2500 HD | 4WD | N/A | w/RPO Code NP8 (2 Speed, Push Button Shift, Transfer Case); Four Button Selection Switch |
| 2006 | Chevrolet | Silverado 3500 | 4WD | N/A | w/RPO Code NP8 (2 Speed, Push Button Shift, Transfer Case); Four Button Selection Switch |
| 2006 | Chevrolet | Suburban 1500 | 4WD | N/A | w/RPO Code NP8 (2 Speed, Push Button Shift, Transfer Case); Four Button Selection Switch |
| 2006 | Chevrolet | Suburban 2500 | 4WD | N/A | w/RPO Code NP8 (2 Speed, Push Button Shift, Transfer Case); Four Button Selection Switch |
| 2006 | Chevrolet | Tahoe | 4WD | N/A | w/RPO Code NP8 (2 Speed, Push Button Shift, Transfer Case); Four Button Selection Switch |
| 2006 | GMC | Sierra 1500 | 4WD | N/A | w/RPO Code NP8 (2 Speed, Push Button Shift, Transfer Case); Four Button Selection Switch |
| 2006 | GMC | Sierra 1500 HD | 4WD | N/A | w/RPO Code NP8 (2 Speed, Push Button Shift, Transfer Case); Four Button Selection Switch |
| 2006 | GMC | Sierra 2500 HD | 4WD | N/A | w/RPO Code NP8 (2 Speed, Push Button Shift, Transfer Case); Four Button Selection Switch |
| 2006 | GMC | Sierra 3500 | 4WD | N/A | w/RPO Code NP8 (2 Speed, Push Button Shift, Transfer Case); Four Button Selection Switch |
| 2006 | GMC | Yukon | 4WD | N/A | w/RPO Code NP8 (2 Speed, Push Button Shift, Transfer Case); Four Button Selection Switch |
| 2006 | GMC | Yukon XL 1500 | 4WD | N/A | w/RPO Code NP8 (2 Speed, Push Button Shift, Transfer Case); Four Button Selection Switch |
| 2006 | GMC | Yukon XL 2500 | 4WD | N/A | w/RPO Code NP8 (2 Speed, Push Button Shift, Transfer Case); Four Button Selection Switch |
| 2005 | Chevrolet | Avalanche 1500 | 4WD | N/A | w/RPO Code NP8 (2 Speed, Push Button Shift, Transfer Case); Four Button Selection Switch |
| 2005 | Chevrolet | Avalanche 2500 | 4WD | N/A | w/RPO Code NP8 (2 Speed, Push Button Shift, Transfer Case); Four Button Selection Switch |
| 2005 | Chevrolet | Silverado 1500 | 4WD | N/A | w/RPO Code NP8 (2 Speed, Push Button Shift, Transfer Case); Four Button Selection Switch |
| 2005 | Chevrolet | Silverado 1500 HD | 4WD | N/A | w/RPO Code NP8 (2 Speed, Push Button Shift, Transfer Case); Four Button Selection Switch |
| 2005 | Chevrolet | Silverado 2500 HD | 4WD | N/A | w/RPO Code NP8 (2 Speed, Push Button Shift, Transfer Case); Four Button Selection Switch |
| 2005 | Chevrolet | Silverado 3500 | 4WD | N/A | w/RPO Code NP8 (2 Speed, Push Button Shift, Transfer Case); Four Button Selection Switch |
| 2005 | Chevrolet | Suburban 1500 | 4WD | N/A | w/RPO Code NP8 (2 Speed, Push Button Shift, Transfer Case); Four Button Selection Switch |
| 2005 | Chevrolet | Suburban 2500 | 4WD | N/A | w/RPO Code NP8 (2 Speed, Push Button Shift, Transfer Case); Four Button Selection Switch |
| 2005 | Chevrolet | Tahoe | 4WD | N/A | w/RPO Code NP8 (2 Speed, Push Button Shift, Transfer Case); Four Button Selection Switch |
| 2005 | GMC | Sierra 1500 | 4WD | N/A | w/RPO Code NP8 (2 Speed, Push Button Shift, Transfer Case); Four Button Selection Switch |
| 2005 | GMC | Sierra 1500 HD | 4WD | N/A | w/RPO Code NP8 (2 Speed, Push Button Shift, Transfer Case); Four Button Selection Switch |
| 2005 | GMC | Sierra 2500 HD | 4WD | N/A | w/RPO Code NP8 (2 Speed, Push Button Shift, Transfer Case); Four Button Selection Switch |
| 2005 | GMC | Sierra 3500 | 4WD | N/A | w/RPO Code NP8 (2 Speed, Push Button Shift, Transfer Case); Four Button Selection Switch |
| 2005 | GMC | Yukon | 4WD | N/A | w/RPO Code NP8 (2 Speed, Push Button Shift, Transfer Case); Four Button Selection Switch |
| 2005 | GMC | Yukon XL 1500 | 4WD | N/A | w/RPO Code NP8 (2 Speed, Push Button Shift, Transfer Case); Four Button Selection Switch |
| 2005 | GMC | Yukon XL 2500 | 4WD | N/A | w/RPO Code NP8 (2 Speed, Push Button Shift, Transfer Case); Four Button Selection Switch |
| 2004 | Chevrolet | Avalanche 1500 | 4WD | N/A | w/RPO Code NP8 (2 Speed, Push Button Shift, Transfer Case); Four Button Selection Switch |
| 2004 | Chevrolet | Avalanche 2500 | 4WD | N/A | w/RPO Code NP8 (2 Speed, Push Button Shift, Transfer Case); Four Button Selection Switch |
| 2004 | Chevrolet | Silverado 1500 | 4WD | N/A | w/RPO Code NP8 (2 Speed, Push Button Shift, Transfer Case); Four Button Selection Switch |
| 2004 | Chevrolet | Silverado 2500 | 4WD | N/A | w/RPO Code NP8 (2 Speed, Push Button Shift, Transfer Case); Four Button Selection Switch |
| 2004 | Chevrolet | Silverado 2500 HD | 4WD | N/A | w/RPO Code NP8 (2 Speed, Push Button Shift, Transfer Case); Four Button Selection Switch |
| 2004 | Chevrolet | Silverado 3500 | 4WD | N/A | w/RPO Code NP8 (2 Speed, Push Button Shift, Transfer Case); Four Button Selection Switch |
| 2004 | Chevrolet | Suburban 1500 | 4WD | N/A | w/RPO Code NP8 (2 Speed, Push Button Shift, Transfer Case); Four Button Selection Switch |
| 2004 | Chevrolet | Suburban 2500 | 4WD | N/A | w/RPO Code NP8 (2 Speed, Push Button Shift, Transfer Case); Four Button Selection Switch |
| 2004 | Chevrolet | Tahoe | 4WD | N/A | w/RPO Code NP8 (2 Speed, Push Button Shift, Transfer Case); Four Button Selection Switch |
| 2004 | GMC | Sierra 1500 | 4WD | N/A | w/RPO Code NP8 (2 Speed, Push Button Shift, Transfer Case); Four Button Selection Switch |
| 2004 | GMC | Sierra 2500 | 4WD | N/A | w/RPO Code NP8 (2 Speed, Push Button Shift, Transfer Case); Four Button Selection Switch |
| 2004 | GMC | Sierra 2500 HD | 4WD | N/A | w/RPO Code NP8 (2 Speed, Push Button Shift, Transfer Case); Four Button Selection Switch |
| 2004 | GMC | Sierra 3500 | 4WD | N/A | w/RPO Code NP8 (2 Speed, Push Button Shift, Transfer Case); Four Button Selection Switch |
| 2004 | GMC | Yukon | 4WD | N/A | w/RPO Code NP8 (2 Speed, Push Button Shift, Transfer Case); Four Button Selection Switch |
| 2004 | GMC | Yukon XL 1500 | 4WD | N/A | w/RPO Code NP8 (2 Speed, Push Button Shift, Transfer Case); Four Button Selection Switch |
| 2004 | GMC | Yukon XL 2500 | 4WD | N/A | w/RPO Code NP8 (2 Speed, Push Button Shift, Transfer Case); Four Button Selection Switch |
| 2003 | Chevrolet | Avalanche 1500 | 4WD | N/A | w/RPO Code NP8 (2 Speed, Push Button Shift, Transfer Case); Four Button Selection Switch |
| 2003 | Chevrolet | Avalanche 2500 | 4WD | N/A | w/RPO Code NP8 (2 Speed, Push Button Shift, Transfer Case); Four Button Selection Switch |
| 2003 | Chevrolet | Silverado 1500 | 4WD | N/A | w/RPO Code NP8 (2 Speed, Push Button Shift, Transfer Case); Four Button Selection Switch |
| 2003 | Chevrolet | Silverado 1500 HD | 4WD | N/A | w/RPO Code NP8 (2 Speed, Push Button Shift, Transfer Case); Four Button Selection Switch |
| 2003 | Chevrolet | Silverado 2500 | 4WD | N/A | w/RPO Code NP8 (2 Speed, Push Button Shift, Transfer Case); Four Button Selection Switch |
| 2003 | Chevrolet | Silverado 2500 HD | 4WD | N/A | w/RPO Code NP8 (2 Speed, Push Button Shift, Transfer Case); Four Button Selection Switch |
| 2003 | Chevrolet | Silverado 3500 | 4WD | N/A | w/RPO Code NP8 (2 Speed, Push Button Shift, Transfer Case); Four Button Selection Switch |
| 2003 | Chevrolet | Suburban 1500 | 4WD | N/A | w/RPO Code NP8 (2 Speed, Push Button Shift, Transfer Case); Four Button Selection Switch |
| 2003 | Chevrolet | Suburban 2500 | 4WD | N/A | w/RPO Code NP8 (2 Speed, Push Button Shift, Transfer Case); Four Button Selection Switch |
| 2003 | Chevrolet | Tahoe | 4WD | N/A | w/RPO Code NP8 (2 Speed, Push Button Shift, Transfer Case); Four Button Selection Switch |
| 2003 | GMC | Sierra 1500 | 4WD | N/A | w/RPO Code NP8 (2 Speed, Push Button Shift, Transfer Case); Four Button Selection Switch |
| 2003 | GMC | Sierra 1500 HD | 4WD | N/A | w/RPO Code NP8 (2 Speed, Push Button Shift, Transfer Case); Four Button Selection Switch |
| 2003 | GMC | Sierra 2500 | 4WD | N/A | w/RPO Code NP8 (2 Speed, Push Button Shift, Transfer Case); Four Button Selection Switch |
| 2003 | GMC | Sierra 2500 HD | 4WD | N/A | w/RPO Code NP8 (2 Speed, Push Button Shift, Transfer Case); Four Button Selection Switch |
| 2003 | GMC | Sierra 3500 | 4WD | N/A | w/RPO Code NP8 (2 Speed, Push Button Shift, Transfer Case); Four Button Selection Switch |
| 2003 | GMC | Yukon | 4WD | N/A | w/RPO Code NP8 (2 Speed, Push Button Shift, Transfer Case); Four Button Selection Switch |
| 2003 | GMC | Yukon XL 1500 | 4WD | N/A | w/RPO Code NP8 (2 Speed, Push Button Shift, Transfer Case); Four Button Selection Switch |
| 2003 | GMC | Yukon XL 2500 | 4WD | N/A | w/RPO Code NP8 (2 Speed, Push Button Shift, Transfer Case); Four Button Selection Switch |
* 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:
12590219
Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.