Question about 2003 GMC Sonoma Extended Cab
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Posted on Jan 02, 2017
On top of the transfer case is a vacuum switch with 3 vacuum lines connected to it. This switch controls when vacuum is applied to the vacuum actuator. This switch can fail partly and allow fluid from the transfer case to be sucked up into the vacuum lines and anything connected to them as well. When you replaced the actuator before, did you notice any oily fluid inside of it?
Posted on Dec 23, 2008
has your transmission oil been low? only reason i ask that is you said it acted like it was pressurized i have seen the rear seal on the trans go out and overfill the transfer case before. you never want to fill it over the fill hole. so if it held just over a quart that is what it takes. but there is still the question as to where the other fluid came from my guess would be watch for the trans fluid to be low.
Posted on May 06, 2009
The Z71 typically comes with the auto 4wd transfer case (cannot remember the GM number). This requires AutoTrak II, which is available at a GM dealer. Do not use any other fluid in this transfer case! The previous post was correct in the location of the two plugs, but not on the fluid (the other types of transfer cases by GM use ATF). The transfer case is located under the truck right under the cab. There is a small skid plate under it, and a large driveshaft leaves the rear end of the case heading to the rear differential (axle). If you have the manual or electronic w/o auto 4WD transfer case, you can use Dexron III, but Dexron VI is a better fluid that is also now available at your local auto parts store. Again, if you have the AUTO 4WD button in the dash, use the AutoTrak II fluid from the dealer.
Posted on May 22, 2009
generally there is 2 hose going to the reservior , usually the small one it the inlet, take that off anbd put a blocked off hose in place. put into a bucket, have a few liters handy turn the car on and have some1 fill it keeping it full, warning it will come out fast. and have some1 turning the steering wheel lock to lock. untill clean, the turn car off
Posted on Jul 11, 2009
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