I have a 2005 Trailblazer that just quit running. I have tried several things to see if I can get it running again, but it has become clear I need to do a compression test. How exactly do I do that? Keep in mind I am a novice. Thanks, Dario

 

I sent you a P.M
I just can't tell you what the compression should be on that quad...............I don't know!!!!!......Someone here should reply and tell you what compression numbers you "SHOULD" have on the gauge!!....Good Luck.......Caper........

 

you will need a compression gauge , and it should read between 120-125 pounds for the trailblazer . check compression with ignition off and the throttle open . if compression reads low , put two teaspoonsof oil down the sparkplug hole and recheck . if compression improves a bunch ...get out the wrenches .

 

anything below 100 psi time to bebuild.