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06 envoy no power beyond switch ,replaced switch and front actuator

4wd wont work replaced switch and front 4wd actuator no power beyond switch

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6 Suggested Answers

6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

  • 66 Answers

SOURCE: switching in to 4wd on the fly get a loud clunk and some grinding

Yeah i get the same thing when im hitting the whoops at 80 miles an hour.What is the deal with this.

Posted on Jan 23, 2009

  • 2 Answers

SOURCE: power front seats

Use a hammer and tap each of the travel rails on seat, this worked great for me, something just gets misaligned in there.

Posted on Apr 26, 2009

Molson02536
  • 3854 Answers

SOURCE: 2005 GMC Envoy Locked in 4WD all the time

If your luck it's going to be a $15.00 vacuum switch on the transfer case that takes about 15 min to replace, if it's the electronic solenoid to the transfer case then it's going to be cost a little more and take a little longer. If your try switching from 4WD to 2WD and hear the solenoid working by hearing the cluck's when it engages and disengage then it's going to be the vacuum switch on top of the transfer case on the drivers side. Auto Zone Sell's them for $15.00 and they will have the step by step instructions to replacing the switch. They will also have the transfer case solenoid  too, if you don't hear the solenoid. Check the fuses, the fuse may have gone bad. Good luck and hope this helps.

Posted on Jun 19, 2009

GARYca
  • 672 Answers

SOURCE: 2002 envoy 4wd problem. clicking sound comes and

Clicking sound- Possible electronic fan clutch failing. This is a typical problem with the 4.2L I6. When you hear the clicking, open the hood and listen if its coming from the fan clutch on front of the engine. this could also cause abnormal engine and transmission cooling. As for the "N" light and 4wd issue, have scanned at the dealer....Hopefully this helps

Posted on Jul 18, 2009

  • 103 Answers

SOURCE: have a 98 gmc yukon. just had tranny replaced and

gm has had a lot of problems with the button switch on the dash id start there

Posted on Mar 20, 2010

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1 Answer

Service 4wd light on 2004 gmc envoy


Could be a bad dash switch but Envoy's and Chevy Trailblazers are notorious for bad 4wd actuators, which are located on the right side of the front differential. There is an electrical box that moves the shaft back and forth to engage the 4wd when you push the button inside. Look for a black box on the front axle with a wire going into it. Check that the plug is clean, apply a light coat of dielectric grease(available at most auto parts stores at the counter in a little packet) and plug it back in. If that doesn't work I would see a mechanic and get a professional dianoses.

Jan 13, 2015 | GMC Cars & Trucks

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How To Replace 4x4 Front Axle Actuator Chevy Trailblazer GMC Envoy 02-06...


<a href="http://www.1aauto.com">How To Install Repair Replace 4x4 Front Axle Actuator Chevy Trailblazer GMC Envoy 02-06 1AAuto.com</a><utube src="f-rYKsRRk28">

on Jun 09, 2011 | Chevrolet TrailBlazer Cars & Trucks

2 Answers

2004 envoy 4 wd quit working


I had TONS of issues with my 2001 Jimmy 4wd. A few things to check; the 4wd actuator switch, the vacuum switch, hub assembly, and the electronic 4wd dash switch.

Apr 19, 2014 | 2004 GMC Envoy

1 Answer

No power beyond the switch ,have replaced switch and front actuator


Have you checked fuse #48 in rear fuse box and fuse #8 in underhood fuse box?

Mar 25, 2014 | 2006 GMC Envoy

1 Answer

When I switch my 2002 envoy into 4wd it does not engage and 4wd service light comes on? How can I fix this problem as it worked fine before


This problem could be the Transfer Case actuator/motor or the spline disconnect assembly at the front differential, or a bad Transfer Case Control Module. The other important maintenance action that needs to happen every 50K miles is the transfer case fluid needs to be changed.
Repair of these item is probably not for a unintiated DIY'r.

Jan 21, 2013 | 2002 GMC Envoy

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

1 Answer

CHECK 4WD WARNING CAME ON. AFTER TURNING ENGINE


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.

Jan 04, 2010 | 2005 GMC Yukon Xl Denali

2 Answers

1999 tahoe 4 wheel drive trouble light is on. Wont go into 4


my 2000 chevy tahoe 4wheel drive light indicator wont stay on even when i tryto angage automatic 4 wheel

Dec 24, 2009 | 1999 Chevrolet Tahoe

1 Answer

01 suburban 4x4 wont work.


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, That actuator is usually the problem 90% of time.

Dec 09, 2009 | 2001 Chevrolet Suburban

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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