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4x4 wont engage on a 1979 gmc sierra grande, it will go to 2 low, neutral, and 2 high but the shifter wont go far enough to engage 4 high or 4 low

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6 Suggested Answers

  • 507 Answers

SOURCE: 1990 GMC Sierra 4x4 1500

the connections near the front axle that activate the motor to engage the system aren't melted? That's a comon problem for that body style. If there good, sounds like it could be that motor itself. To figure out if it's you motor or transfercase, jack up the rear end, have a friend inside shift into 4 wheel drive, or try to, and put it in gear and apply some gas. If the front driveshaft is turning then it's something with the front end. If not, farther back in the system.

Posted on Sep 22, 2008

  • 232 Answers

SOURCE: 2000 Dodge Durango will not shift out of 2nd gear

It seems to be stuck in 4x4 still. There could be damaged done to the powertrain by the towing company. Therefore they should be held accountable for the damage and repair that will be needed. You never tow a vehicle in 4x4 it should be carried on a flat-back. Same with AWD vehicles. The towing companies are well aware of this, is their business to know. Make sure to disengage the 4x4, put the 4x4 shifter on the floor in neutral while in park or not moving. If you continue to have problems contact the towing company and hold them accountable for it. See what you can work out with them. If they tell you they are not responsible then contact a lawyer and make them responsible for it.

Posted on May 19, 2009

  • 523 Answers

SOURCE: replace neutral safety switch on a 1988 gmc sierra

Typically the Neutral Safety Switches are located with the gear selector, either in the column or the floor.

Hope this helps,
Tom

Posted on Aug 21, 2009

  • 400 Answers

SOURCE: 97 gmc sierra won't go into 4x4. Electronic

Take the front axle actuator out of the axle. Plug it back in and have some one push the 4x4 button. The actuator should move, it's a liniar motor. If it doesn't then the actuator is bad or there is a wiring problem. If it does there is a problem in your front diff or some where else in the system.
I'd take a guess and say it's the front actuator.

Posted on Oct 11, 2009

dennymulford
  • 1055 Answers

SOURCE: 4 wheel drive not working

its a bad actulator,cost 65,00 at auto zone

Posted on Dec 31, 2009

  • 1 Answer

SOURCE: 1995 gmc sierra 4x4 shifter wont go in 4 wheel drive.

my name is michael. You said it will go into 4 low but not into 4 hi. Have you lifted the truck to see if it is operational? Does your 4x4 light come on? Does it grind into either 4 hi or low? And one thing, has anyone ever taken the axle out on the right hand side? Please feel free to email me at MOFRACKY1@hotmail.com.

Posted on Jan 30, 2010

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There is a actuator on the front axle. These are notorios for going bad. The new one will usualy come with a slug (round piece of metal) to install in front of the new actuator so it will engage your 4X4 faster. The factory setup was slow due to the pin having to move so far. The actuator will be towards the front of the vehicle on the passenger side of the differential.
Have a great evening

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