Having some issues with my tach in the Monte. To start with we're talking about a '98 Gen 2.5, the tach will work sometimes and other times not. It doesn't correspond with the actual RPM's, it will either work or not. I've searched and there isn't anyone really having a problem with these, so either it stops and no one cares to fix them, or it's not all that common. I'm proud of the Monte, I bought it from the original owner and even though it just tipped the 200k mile mark, it's been very well maintained and it's a kick in the pants to drive, so I'd like to fix it. So, here's my question, is this an electronic type tach (which I assume from the on again/off again working)? Is this likely a sensor on the transmission or behind the gauge cluster?