Z71 transfer case

SOURCE: Ned to change the oil in transfer case

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.

SOURCE: 1996 chevy silverado z71 electronic transfer case wont work

It's the transfer case vacuum switch. Easy fix.

SOURCE: bolt to check transfer case fluid level

18 mm or 3/8 drv rachet dex III fluid or gm manual transmission fluid don't use dex VI

SOURCE: fluid in a transfer case

if it is an electric shift t-case gm has there own oil not found at auto part stores

SOURCE: I have 97 chevy silverado 1500 z71. Front diff not lockin in

yes replace actuator