Question about 1999 Chevrolet Blazer

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My 4wd keeps jumping to 4lo and it should be in 2hi help

Triing to find out why it wont go back to 2hi and is it safe to drive in auto4wd mode

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  • 16 Answers

If your have not changed one of the differentials it is safe to drive i would check the vacuum lines going to the transmission

Posted on Apr 23, 2013

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Posted on Jan 02, 2017

  • 1 Answer

SOURCE: My 1996 full size chevrolet tahoe will not go into 4wd

check the solenoid on the front differential. i had a similar problem. when i would start to engage 4wd low/high and it would blow the fuse. i replaced the front solenoid and fixed my problem.

the solenoid can be found in the right side of the front differential. costs about $100 at local part store and takes 5-10 to changeout with an adjustable wrench.

Posted on Nov 12, 2009

  • 90 Answers

SOURCE: My 98 chevy blazer won't shift into 4wd.

Most common problem is the vacuum diaphragm that is so inconviently mounted UNDER the battery tray.The cable that locks in the front diff is attached to it and vacuum pulls it in/out.

Posted on Dec 23, 2008

  • 6 Answers

SOURCE: s10 pickup 4wheel drive wont shift from 4hi to 2hi

Mine is on the front drivers side, is yours? I just about fell over when I discovered who they designed it!

Posted on Jan 01, 2009

  • 1 Answer

SOURCE: 2001 s10 pickup transfer case wont go out of 4lo

Mine is acting up as well, a mechanic friend of mine said it was the four wheel drive actuator, and it was quite common he said

Posted on Jan 22, 2009

  • 14 Answers

SOURCE: 99 Blazer-push button 4wd not working

Make sure that all 4 tires have the same tread on them, if one or more of them are different, then the 4wd may not engage. I had the same problem with my blazer, I changed only 2 tires at a time. The front tires would rotate faster than the rear ones, the gears in the transfer case won't line up right.

Posted on Apr 29, 2009

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Error message repair 4wd


I guess you probably don't know what transfer case you have ?
SERVICE 4WD
Refer to
?€¢
Transfer Case Description and Operation in Transfer Case - NVG 149-NP3


?€¢
Transfer Case Description and Operation in Transfer Case - NVG 246-NP8


?€¢
Transfer Case Description and Operation in Transfer Case - NVG 261-NP2


?€¢
Transfer Case Description and Operation in Transfer Case - NVG 263-NP1


The NVG 246 EAU provides 5 modes, Auto 4WD, 4HI, 4LO, 2HI and Neutral.
The four manual mode, or range gear positions, of the NVG 261 transfer case are:
?€¢
2HI - 2 wheel drive high range


?€¢
4HI - 4 wheel drive high range, part-time


?€¢
4LO - 4 wheel drive low range, 2.72:1 gear ratio reduction


?€¢
N - Neutral, 4 wheel


The NVG 263 transfer case provides the driver with 4 manual mode/gear positions:
?€¢
2HI - 2 Wheel Drive high range


?€¢
4HI - 4 Wheel Drive high range


?€¢
4LO - 4 Wheel Drive low range


?€¢
Neutral


With the info I've given you ,you should be able too now !
There is probably a code stored somewhere !
DTC B0790 DTC B2725 DTC C0300 DTC C0305 DTC C0306 DTC C0321 DTC C0327 DTC C0359 DTC C0374 DTC C0379 DTC C0550.

Jan 31, 2015 | 2004 Chevrolet Silverado 2500

1 Answer

My 97 Jimmy is shifted into 4hi and will not switch to 2hi, the lights flash and i hear a clicking but it wont shift


when deactivating youre four wheel drive make sure youre rig is in nautral this helps with the gears lining up. whan youre 2-hi light flashes hit a second time. Ive had this problem befor.

Jan 12, 2013 | 1997 GMC Jimmy

1 Answer

4Hi won't switch back to 2Hi


First try hitting the 2HI when in nuetral. If that doesn't work put the vehicle in reverse and hit the 2HI switch and tap the brakes at the same time. Usual if you do this, when you put it into drive it will release.

Mar 24, 2010 | 1999 GMC Jimmy

1 Answer

Shifted into four wheel drive. went to shift back in to 2 hi and now the transmisson wont shift


my 99 jimmy shifts into 4lo all the time.
1. Turn truck off
2. set parking brake
3. start truck and shift into neutral
4. push 2hi button(should shift back)
put back in park,release brake
might work for you

Dec 25, 2009 | 1998 GMC Jimmy

1 Answer

02 dakota wont shift from 4hi to 2 hi


Try commanding the drive ranges while in netural cycling them. This may normalize the controller that senses the position from the encoder motor assembly. There maybe a procedure for that in a service manual.

Dec 12, 2009 | 2002 Dodge Dakota Club Cab

3 Answers

HOW DO I PUT A 1998 GMC JIMMY IN 4 WHEEL DRIVE?, DO I HAVE BE IN "PARK" OR CAN I CHANGE IT INTO 4 WHEEL DRIVE WHILE IM DRIVING?


You should be able to put in 4x4 while in drive less than 35mph. Mine had a switch to turn to engage or dis-engage.

Oct 15, 2009 | 1998 GMC Jimmy

2 Answers

99 chevy s-10 4x4 (push button) stuck in 4hi


do you have to truck in neutrul when trying to swtich back. some models you need to put it into 4 low then into 2 hi.

Jul 31, 2009 | 1999 Chevrolet Silverado 1500

1 Answer

Why would all the lights come on my 4 wheel drive buttons about ten minutes after i start the truck


My 2003 Silverado has done this several times. This happens (at least on my truck) when I switch from any other mode to 2H when the truck is not moving. The front hubs are locked in the engaged position (actually, it locks inside the front differential) when in 4HI, 4LO, or Auto-Trac. When switching to 2HI, the front hubs try to unlock. The mechanism may bind, especially if they haven't been used for months, like during the summer, and don't completely move to the unlocked position. A switch tells the controller when unlocked, but doesn't always get triggered when the hubs don't get completely disengaged. Usually cycling between 2HI and Auto-Trac while driving will free up the hubs and make prevent the problem of all 4 lights coming on at once. Turning the engine off and then restarting it will usually correct the problem with all 4 lights lit at the same time by resetting the transfer case controller. Then, you will be able to switch from 2HI to Auto-Trac and back to 2HI while driving, as described above, to free up the mechanism. If this doesn't fix it, you will likely have to replace the switch in the front differential that tells when the hubs are completely disengaged, or, more likely, the motor that disengages the hubs/drive axles in the front diff.

Jul 16, 2009 | 2004 Chevrolet Silverado 2500HD

2 Answers

S10 pickup 4wheel drive wont shift from 4hi to 2hi


A good ground is very imporant on these vehicles

Dec 31, 2008 | 2000 Chevrolet Blazer

3 Answers

Jeep 4wd auto trans


Place the trans in nuetral then put the transfer case in 2HI.
when you drive on the road always have the transfer case in 2HI UNLESS you have a transfer case that has an alltime 4WD option

Jun 11, 2008 | 1987 Jeep Wrangler

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