Question about 1999 GMC Sierra
Posted by Anonymous on
If it's a manual case ( pull stick ) then it's dexron III automatic trans fluid , if it's automatic ( push button ) then use GM part # 12378396
Posted on Jul 26, 2010
If u have an automatic transfer case[[ states AUTO-4WD on push button]] recommended is to replace with gm s own --auto-trak II part# 123785078 its a synthetic blend [blue] about $12 qt will need two qts u can check with some of the auto stores for a similar product if u have the manual transfer case [[lever activation or NO auto-4wd on button]]] system takes automatic transmission fluid dexron III
Posted on Jul 26, 2010
Use DEXTRON III,transmission fluid (GMP/N 12346143 or equevalent)
nv241 transfer case 3.13 lit.(2.25 Qt)
nv243 appropriate capacity(2.1 L.),(,2.2qt)
Posted on Jul 28, 2010
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Posted on Jan 02, 2017
I have the same problem and its in the front axle..Sounds like its in
the t case but its the front axle.Make sure all your tires are the same
size and same air pressure and the inner front axle seals are not
leaking any fluid..
I’m happy to assist further over the phone at https://www.6ya.com/expert/joe_a3369546f8067589
Posted on Mar 29, 2009
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Posted on May 01, 2009
The 4x4 actuator is working on the transfer case, then the front hub 4x4 actuator may have gone bad and that's located on the front differential. It's common for the clip there to corrode and break and is an easy fix with a new collar pin, at worst it's the diaphragm on the vacuum actuator that is located under the battery tray. There is a vacuum switch on the top of the transfer case, driver side but when that fails, your front hub stay's locked in the on position most of the time. check the vacuum lines and 4X4 actuator in the front differential. Good luck and keep me posted and hope it's a simple vacuum line that may have come loose. You can pick up all these parts at Auto Zone or Parts Source and they will have the step by step instructions for you to get the job done with common tools.
Posted on Dec 24, 2009
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