Question about 1992 Chevrolet K1500

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My 1992 chev k1500 wont go in 4wd and the actuator is good?

I chadge the actuator is new and so is the switch on the transfer case. what could be my problem?

Posted by Anonymous on

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Posted on Jan 02, 2017

  • 59 Answers

SOURCE: I just switched out the transfer case (NP 241 C)

Just replace the actuator in the front differential, they commonly go bad, I hope you needed the transfer case anyway.

Posted on Nov 06, 2009

  • 85 Answers

SOURCE: 4WD Not Working - No Vacumn From New Transfer Case Switch

do you have vacumn at the t/c switch when engine is running if not trace the line back to the engine also that line tees off to the vac ball

Posted on Dec 31, 2009

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  • 79 Answers

SOURCE: 1994 k1500 4wd not working. i tried changing

The actuator is not getting power. Try to change the transfer case selector switch

Posted on Jan 10, 2010

  • 5 Answers

SOURCE: 4wd won't engage on a 94 Chevy K1500

If you haven't got 12volts at the actuator(TLA) plug, then you are probably correct from what I have researched as well.
I have found a solution to the problem that would eliminate the need for 12volt power or a TLA.
http://www.4x4posi-lok.com/app_chevy-k.html
I keep blowing fuses on my 1997 GMC K1500 and think this switch may be the culprit for me as well.

Posted on Jan 24, 2010

  • 593 Answers

SOURCE: where is the actuator switch located on the

The actuator solenoid along with the axel solenoid
switch are located at the rear of the front axel on the
right side.And the transfer case switch is located on
top of the transfer case left side. Hope this helps.

Posted on Feb 08, 2010

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2 Answers

K1500 transfer case switch


some of those are vacuum controlled the most common place for them to break is just behind the engine at the intake passenger side check there first. another thing that comes to mind would be the 4x4 accuator located on the front of the front axcel is simply removed by unplugging it and unscrewing it counter clock wise.

Nov 05, 2013 | 1998 Chevrolet K1500

1 Answer

My 1992 wont engage into 4wd


There is an actuator that is screwed into the front differential that engages the front differential which are a common problem. They are easy to change but cost a few $$. There is also a switch on the transfer case that tells the actuator when to engage and those fail as well. Check all related fuses. Then check to see if you have power to the switch and then the actuator and make sure that some wires didn't just get disconnected or damaged. It is usually the actuator.

May 20, 2011 | 1991 Chevrolet K1500

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

3 Answers

1993 K1500 4 wheel drive not engaging. What 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.

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. The actuator may not be fully engaged or disengaged and the fork to the spline may be what is causing the whining or grinding noise you hear.

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

Feb 23, 2010 | 1993 Chevrolet K1500

1 Answer

Where is the actuator switch located on the transfer case?(the switch that engages the 4wd)Thanks!


The actuator solenoid along with the axel solenoid
switch are located at the rear of the front axel on the
right side.And the transfer case switch is located on
top of the transfer case left side. Hope this helps.

Feb 08, 2010 | 1993 Chevrolet K1500

2 Answers

The 4x4 do not engage on my 1990 chevy pick up what do i need to check first


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. The actuator may not be fully engaged or disengaged and the fork to the spline may be what is causing the grinding.

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 20, 2010 | 1992 Chevrolet K1500

1 Answer

Actuator switch or Transfer Case


The acuator switch is soo easy to replace for about 15-20$ just replace that first, also if its the acuator switch the light down at the shift bow will NOT light up. If it were your t-case normally it would light up but nothing would happen

Jan 07, 2010 | 1995 Chevrolet K1500

2 Answers

The 4wd in my 1996 chevy silverado 1500 wont work and i would like to know how many volts should be travelling through the 4wd wires


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.

If I were you, I would buy a new heated actuator. They are available at most auto parts stores, and are about $90. They are also on eBay for about $55 plus shipping. These are very easy to change - just thread out the old one, and thread in a new one.

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.

Jan 07, 2010 | 1996 Chevrolet K1500

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