Question about 1999 GMC Jimmy

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05 gmc yukon xl slt when in 2wheel hi the transfer case drops out of gear, auto 4 wheel still works

If i select auto 4 wheel the car moves again but will not work in 2 wheel hi

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  • 550 Answers

Sound like a worn selector

Posted on Feb 02, 2015

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Posted on Jan 02, 2017

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SOURCE: 2000 gmc yukon xl 4x4 wont engage

see my posting re this at my name: rlf107. $115 in parts and labor solved for me, on a 2000 Yukon XL

Posted on Feb 28, 2009

  • 58 Answers

SOURCE: Cabin filter for a GMC Yukon XL 05

They no longer used a cabin filter after about 2003. The cover is there buth it is molded shut with plastic welds.

Posted on Jan 04, 2009

  • 295 Answers

SOURCE: 2001 Yukon XL SLT 4 speed Auto Transmission shift problem!

Sam,

I would start with a transmission fliud and filter service.

I would then have the trasnmission checked out by a transmission shop. The transmission most of the time has the direct drum band is starting to go. The shops can rebuild it no problem, This is a very common failure wiith the trasnmission.

Good Luck

Posted on Aug 16, 2009

Testimonial: "Thanks alot richtko94'! I'll try that!"

  • 1 Answer

SOURCE: I have a 2003 Yukon

My 2003 yukon xl does the exact same thing. Sorry that I do not have a solution, but I figure its the same reason the daytime running lights always burn-out. The SUV in general has be an absolute POS and I will never buy another.

Posted on Nov 11, 2009

Molson02536
  • 3854 Answers

SOURCE: 1995 gmc yukon wiyh 6.5 diesel 4 wheel drive will

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.

Posted on Jan 02, 2010

Testimonial: "This is exactly the info i need to troubleshoot and repair efficiently complete with wire numbers and colors thanks for the help buddy"

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1 Answer

2005 GMC yukon xl slt transfer case drops out of 2 wheel hi but will work in auto 4 wheel


There is a transfer case control computer in the dash on the left side around the headlight control,they will cause the blinking lights and not shifting.

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2005 GMC Yukon XL- Service 4 WD light comes on and the indicator light is not lit up nor can I change from 2WD to 4WD. It is push button selection with the option of Auto.


It is probably the encoder motor attached to the transfere case. look under the vehicle to see if there is signs of corrosion between the encoder motor and transfere case.

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GMC Yukon XL is stuck in auto 4wd. Service 4wd light is on message center.


First get the codes from the transfer case control module.This will help in diagnosing the problem.You can try pushing the 2hi and 4lo buttons simultaneously for 10 seconds.This should put the transfer case in neutral. Then try going to 2 hi.See if this will get it out of 4wd.Let me know what you find.If you need more help let me know Good luck.

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Won't shift out of 4 wheel drive low


modulator stuck or damaged located at transfer case take a rubber mallet and hit around where modulator and case connect than try to shift again if nothing than un bolt and lube and move actuator rod, with out try to move electronically w/switch back to 2 wheel drive -if moves should work can replace but look for replacement as back up if happens again just change over

Oct 05, 2009 | 2001 GMC Yukon XL

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I have GMC yukon xl 2005 and I got problem on 4 wheel drive.


if i am not mistaking these have the vacuum module on the front differential check it it is probably bad common problem on these trucks from 96 and up if it is the electronic type it could be one of three things the switch on the dash, motor on transfer case, or the electronic module for the 4 wheel drive.

Aug 25, 2009 | 2005 GMC Yukon Xl Denali

1 Answer

2001 Yukon XL SLT 4 speed Auto Transmission shift problem!


Sam,

I would start with a transmission fliud and filter service.

I would then have the trasnmission checked out by a transmission shop. The transmission most of the time has the direct drum band is starting to go. The shops can rebuild it no problem, This is a very common failure wiith the trasnmission.

Good Luck

Aug 16, 2009 | 2002 GMC Sierra 1500

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2000 gmc yukon xl 4x4 wont engage


try replacing decoder module on transfer case they are known to go bad causing same problem.

Jan 02, 2009 | 2000 GMC Yukon XL

1 Answer

2000 yukon xl. 4x4 wont engage


My 2000 Yukon XL with 5300 engine had same problem at 115,800 miles in Aug 2006(I bought the vehicle new January 2000)...My GMC dealer did diagnostic and replaced a faulty 4WD Transfer Case Shift Control. (reading from the service invoice) It was GM part number 15709327. Cost for the repair was $41.48 + labor $74.13, total was $115.71...it now has 165,000 on it and so far no problem and the 4WD works when I need it.

Dec 23, 2008 | 2000 GMC Yukon XL

1 Answer

I have a 2003 Yukon XL that will switch from Auto 4 wheel drive to 4 high or 4 low on its own. The service 4 wheel drive indicator comes on when it is in 4 wheel drive. The fluids in the transfer case...


My 2003 yukon xl does the exact same thing. Sorry that I do not have a solution, but I figure its the same reason the daytime running lights always burn-out. The SUV in general has be an absolute POS and I will never buy another.

Dec 16, 2008 | GMC Yukon XL Cars & Trucks

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