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Item Condition:New
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How to Replace Four Wheel Drive Actuator 2001-14 GMC Sierra 2500
Created on:
Tools used
15mm Wrench
Flat Blade Screwdriver
15mm Socket
Slip-Joint Pliers
1. Removing the Skid Plate
Remove the four 15 mm bolts that are securing the skid plate.
Once those are out, remove the skid plate
2. Un-plugging the Actuator
Using a flat blade screwdriver, pry up on the little latch and unplug the actuator.
3. Removing the old Actuator
Using a pair of large slip joint pliers, grab the bolt and unscrew counterclockwise. Once you've got it started, it should come right out.
4. Installing the new Actuator
Work in reverse of the installation process. There may be some grease that drips out-make sure you have a Teflon Coating, and that you get it straight in.
When pulling it in, don't pull too tight-you don't want to strip the plastic threads.
5. Replacing the Skid Plate
While holding the skid plate up, replace the four 15 mm bolts.
Tighten these bolts up to 30 or 35 foot-pounds so they don't go anywhere.
This video is brought to you by 1AAuto.com your source for quality replacement parts and the best service on the internet.
Hi, I'm Mike Green, one of the owners of 1A Auto. I want to help you save time and money repairing and maintaining your vehicle. I'm going to use my 20+ years' experience restoring and repairing cars and trucks like this to show you the correct way to install parts from 1AAuto.com. The right parts installed correctly. That's going to save you time and money. Thank you and enjoy the video.
In this video we're going to show you how to replace the 4-wheel drive axle actuator on this 2002 Sierra 4x4. This is the same as a lot of different Chevy and GMC trucks and SUVs.
The only tools you'll need are a 15 mm socket and ratchet or wrench, a screwdriver and a pair of large slip joint pliers. If you're having problems on your GM truck, the dash switch says it's going into 4-wheel drive, but the front wheels aren't getting traction or aren't spinning, then it's probably your axle actuator.
First, you're going to remove the skid plate. Now, this is a 2500, so your skid plate may be a little different. These are 15 mm bolts.
Next, you're going to want to unplug the actuator you're just going to use a little screwdriver, pry up on the little latch and then unplug it.
Now, I'm using a pair of slip joint pliers, because it's an awful big nut. You just grab onto it and rotate it counterclockwise. Once it gets going, it comes right out.
Here's my original. Here's my new one from 1A Auto. See the one of them from 1A Auto is exactly the same. That's going to plug in the same and everything. Mount in the same.
Now in this truck this one is working fine, so I'm going to reinstall it. No need to waste a part when it's still working well.
Obviously, reinstallation is just the reverse. You can see there's some grease that drips out, so you want to make sure you have a Teflon coating. Make sure you get it straight in. Then pull it tight. You don't have to pull extremely tight you don't want to strip the plastic threads. Now we can put our skid plate back on. We'll fast forward through putting the skid plate on. Again, it's four 15 mm bolts. You want to tighten them up nice and snug, probably 30, 35 foot-pounds. Make sure they don't go anywhere.
We hope this helps you out. This video was brought to you by www.1AAuto.com your source for quality replacement parts and the best service on the internet. Please feel free to call us toll free at 888-844-3393. We're the company that serves you on the internet and in person.
TRP00099
In Stock
Product Reviews
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4.00/ 5.06
6 reviews
5 Stars
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4wd actuator
william
January 23, 2017
Seems to work well but directions were blurred and silver heat shield was falling off.
J
April 27, 2020
Deliverd FAST had a wire schematic to wire it up too couldn't ask for much more
Ruined front differential
M
February 11, 2021
I put this on my 94 k1500 in 2020, apparently I got a bad unit from the factory and didn't know it, I had been driving around for awhile and got some front end noise, took it to my mechanic and they informed me my front diff was toast, they put in a new front diff, put this same actuator in the new front diff and fluid was coming through the actuator body and out through the wire connector on the back. Apparently the seals went bad and they believe all the fluid leaked out of my front diff through the actuator. It cost me 3300$ with labor for a new front end, we will see how good the warranty on it is. Hopefully my experience was a one time quality issue
Easy to install
Chuck
November 18, 2021
Instructions are pretty straight forward,easy to install. My old thermal actuator wasn't working, so I converted it to this now 4wd works.
Front axle actuator install.
Bret
January 29, 2022
The unit and cable looked great! It works which makes it even better. The only problem I had was splicing the brown wire into the transfer case connector. I didnt have a waterproof splice, plus I didnt have the removal tool to pull the brown wire out of the connector for the transfer case switch. I decided to strip out about 3/8 inch of insulation on that wire and solder the brown wire from the new cable assembly to it, then I chose to seal the solder connection with epoxy to make to waterproof. It should never be an issue there under the truck. Except for that solder connection it was an easy install. Now my front axle locks in great.
Satisfied customer
Sheila
December 22, 2022
good quality, easy install
Customer Q&A
What wire on the vehicle do you splice the brown wire on the harness to?December 29, 2017
James F
10
look for a 3 wire connector at top drivers side of transfer case. I believe it is called the transfer case switch connector in wire diagram, i installed on 96 Chevy p/u. It was pretty close to the transfer case motor. This connector is mounted upright, and has Blu, Brown, and some other color wire, light Blu maybe. splice into the brown, it will be 12v on when switched to 4hi and or 4lo.
December 29, 2017
R I
10
I didnt splice into the harness. I ran the wire inside to the connection box on the firewall behind the emergency brake. In the DRK GRN slot, it just takes a small female blade connector. Hope this helps
January 3, 2018
Alfredo- L
Is this actuator a motorized unit instead of the thermal type?January 8, 2020
Steve A
10
Yes it is
January 8, 2020
Jake N
10
Yes. Put one in my 95 Z71 that had a thermal actuator. Havent regreted it
January 8, 2020
Joshua W
10
yes
January 8, 2020
A L
10
Yes works great
January 8, 2020
Y M
10
motor, the i think it was brown wire, i fused direct to keyed hot, orange wire on fire wall, kicks on every time i throw the shitfer, still no problems 3 years later, i'm cripple and i hooked it up myself, worth every penny, make sure to get the install kit tho or sol,,
January 8, 2020
Erik D
10
The one I got when I purchased this was a motorized unit, hence the extra brown wire and puck spacer.
January 9, 2020
I V
10
Thank you for the inquiry. Yes, this will be a motorized unit. This kit is designed to replace the original shift actuator with the new, revised version. It includes the correct adapter harness for trouble free installation! Please let us know if you have any additional questions!
January 9, 2020
Curtis L
What is the circular cap for in this wiring kit?December 16, 2021
Todd D
10
We do not have this information available to us but instructions are included with the product once received.
December 16, 2021
Jessica D
10
The circular cap is actually a metal button spacer that must go in the axle housing before the new electrical actuator.
December 16, 2021
Tyler S
Do you have a kit that has the rest of the harness so i can just plug it in instead of splicingso from axle to shifter and transfer case?August 22, 2022
Nicholas J
10
We would be happy to check. What is the year, make, model and engine size of your vehicle?
August 22, 2022
Andra M
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