Problems on Monte Carlo

It sounds like you have a loose ground somewhere in your dash. If you have a manual for your car with an electrical schematic then look at all the problem areas and follow the ground wires back, bet they will all have a common point that they use for a ground. When you find that area is will normally be either loose connection or a dirty or corroded connection. Most automotive intermittent electrical problems can be traced down to either a loose or corroded connection. Hope this helps

Later

Gary