Question about 1995 Chevrolet K2500

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Where is the 4WD front axle actuator located on my 1995 chev. K2500 pickup

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The 4wd shift knob should be on the floorboard, the actuator that sends the power to the front axle would be an internal part of the transfer case

Posted on Nov 22, 2014

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Posted on Jan 02, 2017

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2 Answers

Where is the vacuum shift motor located?


Gordon, I will take a guess, the Vacuum shift actuator/motor is located on the front axle. Check the attached pictures of actuator and how to replace video,links,instruction and guides, Good luck
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May 18, 2016 | 1983 Dodge Ramcharger

1 Answer

The 4wd will not engage.


Most likely the front axle actuator,unhook it ,unscrew it from the axle ,then engage the 4x4 ,see if the actuator extends,if not it will need replaced.

Jan 31, 2012 | 1995 Chevrolet C/K 2500

1 Answer

Hello, I have a 1992 Chevy K1500 pickup, 5 speed, 4WD. I just replaced thermal 4WD actuator for the front axle with the new motor type and with a new wiring harness. Always goes into 4WD right away now....


Sounds like you have the actuator switch set to tight. You might want to try to adjust the switch so it has a little room between the switch and the shifter. Hope this helps.

Apr 12, 2017 | 1992 Chevrolet K1500

2 Answers

Heater only will work on low also put shifter in 4 wheel light on but no 4 wheel


The 4wd problem sounds like the actuator on the front differential isn't operating properly by not locking the front hubs. I would start there.

The Heater problem sounds like just a bad ac switch which is common on this pickup.

Jan 10, 2011 | 1995 Chevrolet K1500

1 Answer

1993 chevy pickup 2500 4 wd. 4 wheel drive will not engage. replaced actuator. still did not engage. replaced 4wd switch on transfer case. still does not engage. the 4wd indicator light comes on but it...


physically watch the actuator and have someone else activiate it. If it moves like it's supposed to...you could have a broke axle, third member or even the locking clips on one of the front hubs...

Dec 18, 2010 | 1993 Chevrolet K2500

1 Answer

There is a electronic plug that seats own top of my 2500 dodge pickups axle


FRONT OR REAR AXLE
REAR IS SPEED SENSOR
FRONT I THINK HAS SPEED SENSOR AND ACTUATOR

Dec 09, 2010 | 1998 Dodge Ram 1500 4WD

1 Answer

1991 K2500 pickup, 350tbi,4l80 trans, 4wd not working, I have gotten it to turn on a couple of times but it never stays working. The transfer case does lock in when its put into 4wd. also the actuator is...


On the full size, the front actuator is electric, not vacuum.

When in 4wd mode, a switch on top of the transfer case conducts 12 volts out to the actuator. Wire #50 (brown) is the 12v feed, and it conducts to the light blue wire (#900) to the actuator.
When shifted out of 4wd, the switch opens up and no voltage goes to the actuator.

Check voltage at the connector for the front actuator (at the front differential - it looks like a large bullet that threads into the front diff.) If it has 12 volts, the actuator is the problem. If it does not have 12 volts, check the transfer case switch and the power feed to the transfer case.

I'll assume it is the actuator, if the plug to the actuator is getting 12 volts when in 4wd.
The way this actuator works, is it is a sealed chamber that gets heated by voltage. When it heats, the pin in the end swells and pushes a shift fork in the front differential. The shift fork engages a spline on the passenger side of the differential, and boom! you have 4WD.

GM offered an upgrade to this actuator that is a motor instead of a heated device. However, it requires a small harness addition, a spacer, and a new actuator. It is about a $150 to $200 option.

Good luck. The actuator is usually the problem 90% of time but recheck all of the wire harness just to maker sure there is no short before replacing any parts.

88-UP C/K ACTUATOR UPGRADE
VEHICLE SERVICED: 1994 CHEVROLET FULL SIZE
PURPOSE: IMPROVE AXLE CONNECT ENGAGEMENT TIME AND
COMPONENT RELIABILITY.

SYMPTOMS: NO FRONT DRIVE AXLE ENGAGEMENT WHEN SHIFTED
INTO 4X4.

Obtain the following GM part numbers:
(1) 26060073 Actuator
(1) 88959465 Harness/Spacer Kit

Jan 10, 2010 | 1991 Chevrolet K2500

2 Answers

4x4 wont engage


First thing to make sure of is to check for a blown fuse. The fuse location is marked 4WD and it should be a 25 amp fuse. If the fuse is bad, the lights on the 4wd console wont light up. If the lights do light up, then you can move to the transfer case. On top of the transfer case, toward the rear of the truck is a switch that has a 2 wire connector. That switch sends power to the front axle actuator when you try to enagage 4wd inside the truck. That could be bad. The switch is threaded into the transfer case and is still available through GM. If the switch is ok and the wiring that attaches to it is ok, then you can move up to the axle. Threaded into the front axle is the front axle actuator. These actuators are prone to failure in older trucks and is very prone to cold weather failure. You can test the actuator by removing it and then WITHOUT the truck running, put the truck into 4wd and then turn the key to the hot position. The plunger inside the actuator will extended outwards. More than likely it will be one of those 3 things. If it still wont engage, you may have a short in one of the wiring harnesses associated with the 4wd system. Also, you may have a damaged transfer case. To check the transfer case, put the truck in 4wd without it running and then crawl underneath and see if you can turn the front shaft by hand. If not....it's good. If you can....then the shifter forks inside the case are worn or damaged. I hope this helps.....start small and work your way up!

Jan 30, 2009 | 1989 GMC K2500

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