S-10 Blazer Pushbutton 4X4 Problems  Discussion in 'General
Chevy & GM Tech Questions' started by murdog94, Jan 8, 2011.
1. murdog94      murdog94 Epic Member 5+ Years 5000 Posts
My 2000 S-10 Blazer 4X4 is having a bit of an issue with the 4wd
kicking it. Im wondering what you all think. the switch works
and if i let it think about it long enough it will kick in. Im
thinking thermal switch? its been -10 at night so that is where
i am at. However im not just going to replace parts.   2.
2COR517      2COR517 Epic Member 5+ Years 1000 Posts      The
2000 Blazer uses a vacuum actuator. Engagement should be almost
instant. Sounds like you have a vacuum leak. Could be the
diaphragm on the axle, vacuum switch, or loose/leaking vacuum
line.      Use a hand vacuum pump to test the diaphragm on the
axle. Should be able to engage the axle with just a few inches
of vacuum I'm guessing. And it shouldn't have any leakdown.
1 person likes this.   3. murdog94      murdog94 Epic Member 5+
Years 5000 Posts      int