CHEVROLET TRAILBLAZER INSTRUMENT CLUSTER GAUGES OIL PRESSURE

I Replaced My Oil Sending Unit, Filter And Oil And The Oil Pressure Gauge Is Still Acting Up. It Is Going From 40 To Zero And Then To 20...

When I Turn My Air Conditioning Or My Defrost On It Brings My Engine Rpms Down In Surges. It Does This So Bad That Sometimes It Makes The...

When Idling The Oil Gauge Is Running Okay, Then After Driving A Distance The Oil Guage Will Go To 0, And Then The Check Guages Light Will...

My Oil Gauge Needle Is Bottomed Out. The Speedometer Has Stuck A Couple Times. Engine Light Is On. I Took To Get Looked At And He Said That...

When The Engine Is On The Oil Pressure Gauge Goes All The Way To 80psi, While Driving It Goes Further Past The Last Mark Which Is 80. I'...