1999 GMC Sonoma "engage 4wd" Questions

4wd front hub wont disengage Ive just replaced the 4wd vacume actuator, which was most certainly broken (ripped diaphram and wouldnt go into 4wd.) Now after engaging the 4wd and returning to 2wd i get

...go into 4wd. The 4wd light blinks and there is a noise like its trying to engage but it doesn't. check the actuator under the truck at at the transfer case may need adjustment or lube the actuator ...

no 4wd. on 1999 gmc sonoma 4wd does not engage when put in 4wd hi or lo,switch lights up and i can hear loud clicking under vehicle sounds like a vaccum hose is off

...$25.00 and is common to fail. When they fail, the vacuum to the front axle hub actuator will stay engaged and the axle will always be engaged. it's a simple fix and should take you 15min to replace ...

front axle is not engaging when put i 4wd,2000 gmc sonoma the transfer case seems to be locked in, is the front tail shaft turning,if not problem is in transfer case

4wd not disengaging engaging check power supply to the actuator . check for broken vacuum hoses

4x4 engages automatically when driving my 2001 GMC Sonoma SLS When I start my truck up and put it in gear (automatic) there are a few times it kicks into 4wd automatically without hitting any of the ...

...it? if they arent locked in the 4wd wont work..usually the truck needs to roll some distance in neutral transmission gear for the transfer case to engage..and rolling slowly just above walking

...engage 4wd is not releasing. 2. Front axle u-joint needs replacing. Lift car on jacks with front end off ground. Then spin tires by hand as fast as you can and see if you hear the noise and where it ...