Originally Posted by
foreigneRS
as you say paul, it doesn't seem to due to bushes etc. however, the sensor itself has a metal ring where the bolt goes through and the back of that and where it bolts to needs to be clean. sounds like it won't make a difference, but did on 2 of my sierras that had the same problem.
Nick that would be due to the "air Gap" then mate i've tested with a multimeter and it don't earth to either connections but if teres any corrosion on the alloy ring that will hold the sensor out enough to fook it up
Paul