Replaces

Axle Shift Actuator Dorman 600-100 - DMFWA00001

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88-95 GM Trk 4x4 Actuator (Dorman)
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DORMAN 600-100 [AXLE SHIFT ACTUATOR]

This original style GM 4x4 truck front axle shift actuator is designed to REPLACE your original, defective shift actuator. This is a 1st design actuator. If your truck's current actuator has a black plastic case check our other listings.

Specifications:

  • Brand new Dorman Axle Shift Actuator
  • 2 wire plug with round terminals
  • Mounts INTO front axle housing
  • Replaces dealer part number: 26013495
  • Replaces Connection part number: 1430000
  • Durable construction shift actuator
  • Direct bolt in replacement
  • Built to strict quality control standards
  • Improved gas filled heating element type activation

Installation

The 4 wheel Drive Actuator actually installs quite easily. Locate it on the front axle. Unplug it. Use a large adjustable or correct size wrench and remove the actuator. Reverse to install a new one.

How this four wheel drive actuator works

When you press the button in your vehicle an electrical current passes through the actuator. The actuator is filled with a gas. This gas expands when heated. The electrical current heats the gas the gas builds pressure and forces the plunger out which engages the front axle.

The Problem

There are a number of things that can go wrong to cause you not to be able to engage four wheel drive. Age, damage, and lack of consistent use are the most common reasons for these actuators to go bad. These actuators work in an unfriendly environment. Underneath the car attached to the drivetrain, they are subject to extreme temperature change as well as physical damage from dirt, debris, rocks, etc. The gas inside the actuator can leak out over time and/or from a fracture caused by road debris. There is a mechanical mechanism that can start to stick as time goes on. Sometimes these actuator just plain don't work in extreme cold weather as the gas actually does not get hot enough to expand. Many times these actuators are not used for 9-10 months or more during warm weather. A little moisture penetrating can quickly cause a malfunction. Any one, or combination of these can result in your 4WD system not engaging or not staying engaged.

Diagnosis

A VERY telling symptom that this particular part is your problem is if your 4WD engages when the weather is warm but either does not engage or takes a lot longer to engage when the weather is colder. On most vehicles you push a button for 4WD and an indicator light blinks until the actuator engages. While the light is blinking the electric current is heating the gasses. If you light continues to blink but does not engage or takes a long time to engage (more than 10 seconds) then this actuator is the problem.
Our manufacturer changed the mixture of gas in this new actuator so it is more sensitive at lower temperatures. This has solved the cold temperature problem. We suggest engaging your four wheel drive periodically even during good weather just to "work out" the part and make sure it does not stick.

Item Condition: New

WARNING:  This product can expose you to chemicals including Lead and Lead Compounds, which are known to the State of California to cause cancer, and birth defects or other reproductive harm.  For more information, go to www.P65Warnings.ca.gov.

Lifetime Warranty

This item is backed by a Limited Lifetime Warranty. In the event this item should fail due to manufacturing defects during intended use, we will exchange the part free of charge (excludes shipping charges) for the original purchaser.

  1. step : Removing the Four Wheel Drive Actuator (0:39)
    • Pull the four wheel drive actuator wiring harness of its bracket
    • Disconnect the wiring harness
    • Pull the wire out of its bracket
    • Twist the actuator loose with an adjustable wrench
    • Twist the actuator out by hand
  2. step : Installing the New Four Wheel Drive Actuator (1:11)
    • Twist in the new actuator by hand
    • Tighten the actuator with the adjustable wrench
    • Clip the wire back into its bracket
    • Reconnect the actuator wiring harness
    • Clip the harness back into its bracket

Tools needed for replacement:

    Pliers, Cutters & misc Wrenches

  • Adjustable Wrench

5.00/ 5.0
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Exactly what I needed!
The part fit perfectly and arrived sooner than expected. I plan to buy more parts from 1A Auto in the near future.
November 12, 2018
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Year Make Model Description
1992-1994Chevy Blazer Full Size Chevy Blazer Full Size 4 Wheel Drive Front Axle Shift Actuator Dorman 600-100
1988-1995Chevy K1500 Truck Chevy K1500 Truck Front Axle Shift Actuator Dorman 600-100
1996Chevy K1500 Truck Chevy K1500 Truck (Built Before 1/96 Production Date) with 2 Pin Style Connector Front Axle Shift Actuator Dorman 600-100
1988-1995Chevy K2500 Truck Chevy K2500 Truck Front Axle Shift Actuator Dorman 600-100
1996Chevy K2500 Truck Chevy K2500 Truck (Built Before 1/96 Production Date) with 2 Pin Style Connector Front Axle Shift Actuator Dorman 600-100
1988-1995Chevy K3500 Truck Chevy K3500 Truck Front Axle Shift Actuator Dorman 600-100
1996Chevy K3500 Truck Chevy K3500 Truck (Built Before 1/96 Production Date) with 2 Pin Style Connector Front Axle Shift Actuator Dorman 600-100
1992-1995Chevy Suburban K1500 Chevy Suburban K1500 Front Axle Shift Actuator Dorman 600-100
1996Chevy Suburban K1500 Chevy Suburban K1500 (Built Before 1/96 Production Date) with 2 Pin Style Connector Front Axle Shift Actuator Dorman 600-100
1992-1995Chevy Suburban K2500 Chevy Suburban K2500 Front Axle Shift Actuator Dorman 600-100
1996Chevy Suburban K2500 Chevy Suburban K2500 (Built Before 1/96 Production Date) with 2 Pin Style Connector Front Axle Shift Actuator Dorman 600-100
1995Chevy Tahoe Chevy Tahoe 4 Wheel Drive Front Axle Shift Actuator Dorman 600-100
1996Chevy Tahoe Chevy Tahoe 4 Wheel Drive (Built Before 1/96 Production Date) with 2 Pin Style Connector Front Axle Shift Actuator Dorman 600-100
1988-1995GMC K1500 Truck GMC K1500 Truck Front Axle Shift Actuator Dorman 600-100
1996GMC K1500 Truck GMC K1500 Truck (Built Before 1/96 Production Date) with 2 Pin Style Connector Front Axle Shift Actuator Dorman 600-100
1988-1995GMC K2500 Truck GMC K2500 Truck Front Axle Shift Actuator Dorman 600-100
1996GMC K2500 Truck GMC K2500 Truck (Built Before 1/96 Production Date) with 2 Pin Style Connector Front Axle Shift Actuator Dorman 600-100
1988-1995GMC K3500 Truck GMC K3500 Truck Front Axle Shift Actuator Dorman 600-100
1996GMC K3500 Truck GMC K3500 Truck (Built Before 1/96 Production Date) with 2 Pin Style Connector Front Axle Shift Actuator Dorman 600-100
1992-1995GMC Suburban K1500 GMC Suburban K1500 Front Axle Shift Actuator Dorman 600-100
1996GMC Suburban K1500 GMC Suburban K1500 (Built Before 1/96 Production Date) with 2 Pin Style Connector Front Axle Shift Actuator Dorman 600-100
1992-1995GMC Suburban K2500 GMC Suburban K2500 Front Axle Shift Actuator Dorman 600-100
1996GMC Suburban K2500 GMC Suburban K2500 (Built Before 1/96 Production Date) with 2 Pin Style Connector Front Axle Shift Actuator Dorman 600-100
1992-1995GMC Yukon GMC Yukon 4 Wheel Drive Front Axle Shift Actuator Dorman 600-100
1996GMC Yukon GMC Yukon 4 Wheel Drive (Built Before 1/96 Production Date) with 2 Pin Style Connector Front Axle Shift Actuator Dorman 600-100
1
Only 1 left in stock
Part #: DMFWA00001


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Dorman
Brand #: 600-100

How-to Video:

(02:23 min)