Skip to content
Notice! Fulfillment staff will be off site 9/30-10/6. Orders will be processed the following week of 10/9/23. Please excuse any delays.
Notice! Fulfillment staff will be off site 9/30-10/6. Orders will be processed the following week of 10/9/23. Please excuse any delays.

Easy-wire GM 4x4 hub lock + Indicator Kit


The IFS 8.25 and 9.25 AAM front differential used in 1/2 ton and 3/4 ton GM pickups utilize an electronic actuator to engage the front CV axles and lock hubs in. It's nice to not have to get out of the vehicle to lock the hubs but there's some wiring involved to make this work with a manual shift transfer case. 

This kit takes the signal from your manual transfer case shifting into 4x4 and activates the hub lock actuator and in turn, activates an LED indicator light inside your vehicle to remind you the 4x4 is engaged. 

The harness is fairly basic, but it takes time to construct and comes out much cleaner when it's assembled prior to installation. Along with a clean and shielded design, the harness comes with a new AAM brand actuator (the only reliable brand), proper pigtails for the actuator and transfer case sensor, and a new range sensor for the transfer case, and it's all labeled neatly for ease of install. The LED indicator light is easy to install, we provide the fuse jumper and it's all just turn-key. 

Harnesses are bench tested prior to shipment, and thus are only available with the hub lock motor and sensor so we can ensure proper function. 

Fitment Designed for: 

Van Side - 2003-2022 Chevrolet Express 2500/3500/4500 series vans. 

Truck Side - Verified: 1999.5-2010 Chevrolet Silverado / GMC Sierra 2500 + 3500 series 9.25 Front Differential and NP/NV 261 Manual shift transfer case (2001-early 2007) Unverified: This t-case will work with most any 8.25 or 9.25 AAM front setup, the sensor for the t-case and pigtail may be different. 

Tools Required:

Standard hand tools. Wire strippers, crimpers, soldering iron and/or heat gun if desired. 


NP261 transfer case range sensor, waterproof connector, color-coded wiring harness with looming to lockout motor, fuse block, and in-cab LED light. Includes indicator light, fuse jumper, Dorman Hub Lockout motor (AC Delco/OEM available for additional - Call, wiring diagram and labeled cabling. 

Construction Notes:

14 gauge wiring, plastic looming, AC Delco motor pigtail, Dorman or GM/ACdelco products,

Tips / Skill Level:

1-10 (10 being most difficult) Level 4 - Basic wiring principles required. 

This product may work with other model vehicles.

Shipping, Fulfillment, Taxes, Quality, and Returns
  • Shipping: Our components are carefully wrapped and packaged and ship UPS, USPS, or FedEx, depending on what is available. If you require a particular carrier, please contact us ahead of your purchase.  Customers in Colorado may arrange for in-person pickup within 1-2 business days of purchase taking noted lead times into consideration. 
  • Shipping/Fulfillment time for components: We typically ship within 1-2 business days of your order and we carefully monitor our inventory. In the event that we are unable to meet that timeframe, we will contact you and arrange either a full refund or a timeframe for fulfillment agreeable to the customer. 
  • Taxes: Colorado residents must pay sales tax of 7.5%, no sales tax is collected on out-of-state shipments currently. 
  • Quality and Returns: We are consistently complimented on the quality of our products and the ease of install. Components are hand-built here almost exclusively in Colorado by seasoned professionals who are fanatics about design and execution. If you are in any way disappointed in the components we will issue a full refund less the cost of shipping when the product is returned. If you decide to return any components that didn't apply to your build or you changed your mind about, shipping and a 15% restocking fee will be deducted from the purchase refund.