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

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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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1 Answer

How do I fix my 99 blazer the dome lights won't turn on and the 4 who drive won't light up or work


In the instrument panel fuse box fuse # 8 CTSY LP 10A ,that's for the dome lights, fuse panel is left side of IP. What are you talking about 4 who drive won't light up or work ? 4 wheel drive ? Do you have two speed automatic or two speed selectable ?
Switch Indicator Lamps Do Not Light - One or More ? Check fuse #15 IP fuse box 10A 4WD . This is for two speed auto !

Circuit Description

The indicator lamps circuits consist of 5 individual lamps contained inside the mode/range switch assembly, they are AUTO, 4WD, 2HI, 4HI, 4LO and NEUTRAL. The AUTO, 4WD, 2HI, 4HI, and 4LO lamps are contained inside their respective range button. When the ignition is ON, the transfer case shift control module illuminates the indicator lamp that corresponds to the current ATC gear position by providing a ground through a current limiting driver.
The transfer case shift control module flashes each indicator lamp after a shift has been requested and will continue to flash until the transfer case shift control module can complete the shift. After a shift to AUTO, 4WD, 2HI, 4HI, or 4LO is made, the transfer case shift control module will flash that indicator lamp until the transfer case shift control module receives a high voltage signal on CKT 1695 from the front axle switch.
A solid state circuit located inside the switch supplies ignition voltage to the lamps. The solid state circuit also receives voltage whenever the headlamp switch is in park or headlamp position. When the solid state circuit receives voltage from the headlamp switch it will reduce the voltage that it supplies to the indicator lamps, dimming the lamps when the headlamps are ON.

Feb 07, 2015 | Cars & Trucks

1 Answer

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

2000 chevy suburban stuck in 4 lo anyone out that cant help


Put truck in Neutral while key in run position engine off or on (doesn't matter which). If it's pushbutton 4wd then try hitting 4low again. if that doesn't work some of the chevy trucks required you to press 4hi to get into 4high and then press 4hi again to get back to 2hi, unless yours has a 2hi button. In that case press 4hi to get into 4high and then press 2hi to get back to 2wd. either way you need to be in neutral to get out of 4lo. I have shift on the fly (Mechanical Shifter on floorboard for transfer case) on my 1990 Suburban and still have to put it in neutral to get out of 4lo. Good Luck.

Jan 30, 2014 | 2000 Chevrolet Blazer

1 Answer

How do i know when it is in 4x4 . where must the lever be for it not to be in 4x4. no the lever is has got 2lo, 2hi n 4lo and 4hi. when you drive where must the it be, and is there lights on the bash that...


Hi, 2hi is your normal driving selection, this is NOT in 4WD mode. Both 4lo and 4hi is for 4 wheel driving, 4lo is used in extreme conditions and will gear the vehicle down to a very slow speed with maximum traction at the wheels, 4hi is for general 4 wheel driving in rough terrain, if you have lights on the dash than it will come on when you change gears, hope this help

Feb 16, 2011 | Jeep Cherokee Cars & Trucks

1 Answer

Wont shift out of 4lo to any other 4hi or 2hi what can i do


Shot in the dark but I have done this before! Back up at least 50 yards in reverse with the selector set to 4wd Lo come to a stop, put your transmission in neutral, shift the 4wd selector to 4wd hi wait for a few seconds, shift it to 2wd hi wait a few seconds then put your tranny back into drive and see if that takes it out of 4wd. Good luck

Feb 08, 2010 | 2001 Chevrolet Blazer

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

My 1996 full size chevrolet tahoe will not go into 4wd.It is the electronic version with the switch on the dash for 2hi, 4lo and 4 hi.Did not use 4wd for a year and went to use it and you can hear transfer...


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.

Sep 17, 2009 | Chevrolet Tahoe Cars & Trucks

1 Answer

1999 Blazer AUTO 4WD stays lit up in ALL transfer case modes! WHY


the transfer case module is bad it is bolted to transfer case above front drive shaft

Aug 21, 2009 | Chevrolet Suburban 1500 Cars & Trucks

1 Answer

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.

Dec 22, 2008 | 2000 Chevrolet Blazer

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