Question about 2000 Chevrolet Blazer
I have a 2003 Blazer. The selector switch (vent / heat / defrost) stopped working. It would not change from dash vent to defrost or heat. I did have a spare switch and went to replace it. Upon disassembling, I noticed a light machine type oil coming the vacuum lines. I cleaned it up, replaced the switch and all was well for about 3-4 weeks. Now the problem is back & there is a noticeable vacuum leak from behind the dash.
Any suggestion would help
May sound silly but take a short length of hose and put one end to your ear and use the other end to probe for the leak. It will be substantially louder as you get nearer to it. As far as the oily stuff in the lines, I can't think of anywhere it could be coming from unless the master cylinder is leaking into the power booster and somehow getting into vacuum lines...but this should not happen because any fluid in there would be drawn into the engine, and, the master would be low??? Try to find the leak first and deal with the other thing later...it may turn out to be a "nothing" item.
Posted on Apr 15, 2009
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Posted on Jan 02, 2017
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