--- product_id: 525204962 title: "Dorman 600-490 4WD Actuator Compatible with Select Chevrolet/GMC Models | Fits Select Chevrolet / GMC Models" brand: "dorman" price: "€ 265.07" currency: EUR in_stock: true reviews_count: 5 category: "Dorman" url: https://www.desertcart.hr/products/525204962-dorman-600-490-4wd-actuator-compatible-with-select-chevrolet-gmc store_origin: HR region: Croatia --- # Electric actuator upgrade Fits 1988-1996 Chevy/GMC models Complete repair kit included Dorman 600-490 4WD Actuator Compatible with Select Chevrolet/GMC Models | Fits Select Chevrolet / GMC Models **Brand:** dorman **Price:** € 265.07 **Availability:** ✅ In Stock ## Summary > ⚡ Electrify your 4WD game—because slow is so last decade! ## Quick Answers - **What is this?** Dorman 600-490 4WD Actuator Compatible with Select Chevrolet/GMC Models | Fits Select Chevrolet / GMC Models by dorman - **How much does it cost?** € 265.07 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.hr](https://www.desertcart.hr/products/525204962-dorman-600-490-4wd-actuator-compatible-with-select-chevrolet-gmc) ## Best For - dorman enthusiasts ## Why This Product - Trusted dorman brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Revive Your 4WD System:** Replace failing thermal actuators and restore full 4WD functionality with cutting-edge tech. - • **Precision Fit Guarantee:** Use our garage tool to ensure perfect compatibility with your Chevy or GMC model years 1988-1996. - • **Trusted American Quality:** Backed by Dorman’s century-plus automotive expertise for reliable, long-lasting performance. - • **All-in-One Installation Kit:** Includes both actuator and harness—no extra parts needed, no downtime wasted. - • **Lightning-Fast 4WD Response:** Upgrade from sluggish thermal to instant electric actuation for seamless off-road control. ## Overview The Dorman 600-490 4WD Actuator is a direct replacement kit designed to upgrade older Chevrolet and GMC trucks' thermal differential actuators to a faster, more reliable electric system. Compatible with select models from 1988 to 1996, this kit includes both the electric actuator and harness, ensuring a precise fit and restoring full 4WD functionality with trusted Dorman quality. ## Description The 4WD systems on many older Chevrolet and GMC trucks utilize a thermal differential actuator which is prone to sluggishness and failure when the wax that drives the actuator piston ages and deteriorates, ultimately disabling the 4WD system. This convenient 4WD differential actuator upgrade kit contains the key components required to easily replace the original equipment thermal actuator with a faster-acting electric actuator designed to provide longer, more reliable service. The kit contains our part number 600-101 4WD electric actuator and our part number 600-600 4WD actuator harness, both of which are carefully engineered to precise specifications to update an old technology thermally-activated differential to a more efficient electric differential on specified GM vehicle makes, models and years. This part is compatible with the following vehicles. Before purchasing, enter your vehicle trim in the garage tool to confirm fitment. [Chevrolet Blazer: 1992, 1993, 1994] - [Chevrolet K1500 Suburban: 1992, 1993, 1994, 1995, 1996] - [Chevrolet K1500: 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996] - [Chevrolet K2500 Suburban: 1992, 1993, 1994, 1995, 1996] - [Chevrolet K2500: 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996] - [Chevrolet K3500: 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996] - [Chevrolet Tahoe: 1995, 1996] - [GMC K1500 Suburban: 1992, 1993, 1994, 1995, 1996] - [GMC K1500: 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996] - [GMC K2500 Suburban: 1992, 1993, 1994, 1995, 1996] - [GMC K2500: 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996] - [GMC K3500: 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996] - [GMC Yukon: 1992, 1993, 1994, 1995, 1996] Review: Very easy to install - Very well written instructions that include wiring diagrams to show exactly where the one wire needs to be spliced. Very easy to follow the instructions and install the kit. Worked exactly as expected and fixed my 4WD issue. Review: Excellent upgrade for old 4WD actuator. - Bought this Electronic version to replace the failed 4WD actuator in my 1996 Chev Silverado. The original has some sort of "heated wax" internals that is prone to failure, and very slow to actuate. This replacement is fully electronic and responds immediately when the 4WD button is pressed. It comes with the actuator, a small spacer, and the replacement wiring. The body of this actuator is slightly shorter than the original so a spacer (included) is needed inside the axle mounting tube to make up the difference. The dimension of this spacer is shown in my photos. The wiring comes with a detailed diagram and description of connections required. One end of the included wire loom plugs into the new actuator, the other end plugs into the 2 connector end from the original actuator on the truck, and then there's a third wire that must be connected to an ignition-on power wire somewhere in the truck. The required wire is a brown wire which is powered only when ignition is on. The suggested connection is to the brown wire going to the transfer case, but I found another brown wire next to my under-hood fuse box that was easier to access and worked just as well. Once installed, I discovered my 4WD switch was also problematic and needed to be removed and the connections cleaned. Once this was done the 4WD is engaging and disengaging reliably again and much faster than with the old "wax" actuator. My 4WD indicator lights are also now lighting up reliably again after not having worked for many years. Very happy with this replacement/ upgrade kit from Dorman. Hope this electronic version lasts longer than the old version. ## Features - Upgraded repair - this 4WD differential actuator upgrade kit is designed to update a thermally activated differential to a more efficient electric differential on specified Chevrolet and GMC trucks - Complete solution - this kit includes a 4WD electric actuator and 4WD actuator harness, the key components required to update a 4WD differential - Updated technology - effective replacement for an old technology original equipment thermal differential actuator that is sluggish or has failed, disabling the 4WD system - Trustworthy quality - backed by a team of product experts in the United States and more than a century of automotive experience - Ensure fit - to make sure this part fits your exact vehicle, input your make, model and trim level into the garage tool ## Technical Specifications | Specification | Value | |---------------|-------| | Manufacturer | Dorman Products | | Brand | Dorman | | Model | Dorman 600-490 | | Product Dimensions | 24.99 x 7.49 x 25.4 cm; 639.57 g | | Item model number | 600-490 | | Manufacturer Part Number | 600-490 | | OEM Part Number | 26013495; 26060073; 88959465 | | Item Weight | 640 g | ## Images ![Dorman 600-490 4WD Actuator Compatible with Select Chevrolet/GMC Models | Fits Select Chevrolet / GMC Models - Image 1](https://m.media-amazon.com/images/I/81AvJ2X8ryL.jpg) ## Customer Reviews ### ⭐⭐⭐⭐⭐ Very easy to install *by R***. on 7 January 2025* Very well written instructions that include wiring diagrams to show exactly where the one wire needs to be spliced. Very easy to follow the instructions and install the kit. Worked exactly as expected and fixed my 4WD issue. ### ⭐⭐⭐⭐⭐ Excellent upgrade for old 4WD actuator. *by K***O on 26 June 2024* Bought this Electronic version to replace the failed 4WD actuator in my 1996 Chev Silverado. The original has some sort of "heated wax" internals that is prone to failure, and very slow to actuate. This replacement is fully electronic and responds immediately when the 4WD button is pressed. It comes with the actuator, a small spacer, and the replacement wiring. The body of this actuator is slightly shorter than the original so a spacer (included) is needed inside the axle mounting tube to make up the difference. The dimension of this spacer is shown in my photos. The wiring comes with a detailed diagram and description of connections required. One end of the included wire loom plugs into the new actuator, the other end plugs into the 2 connector end from the original actuator on the truck, and then there's a third wire that must be connected to an ignition-on power wire somewhere in the truck. The required wire is a brown wire which is powered only when ignition is on. The suggested connection is to the brown wire going to the transfer case, but I found another brown wire next to my under-hood fuse box that was easier to access and worked just as well. Once installed, I discovered my 4WD switch was also problematic and needed to be removed and the connections cleaned. Once this was done the 4WD is engaging and disengaging reliably again and much faster than with the old "wax" actuator. My 4WD indicator lights are also now lighting up reliably again after not having worked for many years. Very happy with this replacement/ upgrade kit from Dorman. Hope this electronic version lasts longer than the old version. ### ⭐⭐⭐⭐⭐ Direct fit on my 1995 Suburban *by J***N on 11 January 2026* I bought this to replace the old style thermo-actuator on my 1995 GMC Suburban. Works great, no issues so far. ## Frequently Bought Together - Dorman 600-490 4WD Actuator Compatible with Select Chevrolet/GMC Models - Dorman 600-502 Transfer Case Switch Compatible with Select Cadillac / Chevrolet / GMC Models - Dorman 600-506 Transfer Case Switch Compatible with Select Cadillac / Chevrolet / GMC Models --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.hr/products/525204962-dorman-600-490-4wd-actuator-compatible-with-select-chevrolet-gmc](https://www.desertcart.hr/products/525204962-dorman-600-490-4wd-actuator-compatible-with-select-chevrolet-gmc) --- *Product available on Desertcart Croatia* *Store origin: HR* *Last updated: 2026-08-23*