LIKE MANY OTHER COMPLAINTS ON THIS AND OTHER WEB SIGHTS SPEEDOMETER AND TACHOMETER DO NOT READ CORRECTLY. LAST FRIDAY,I DROVE FROM WICHITA,KANSAS TO WICHITA FALLS,TEXAS AT 100 MPH AND 6000 RPMS ACCORDING TO THE INSTRUMENTS. LUCKILY I HAVE A GLOBAL POSITIONING SYSTEM THAT ALSO GIVES MPH AND I WAS ABLE TO CONTROL THE SPEED WITH IT. I ALSO HAD ZERO OIL PRESSURE AT VARIOUS TIMES ACCORDING TO THE GAUGE. THIS SEEMS TO BE A MUCH TOO COMMON PROBLEM WITH GMC AND OTHER GM PRODUCTS OF THIS YEAR. I FEEL GM SHOULD HAVE TO PAY FOR THE REPAIRS AND NOT THE PUBLIC THAT HAS SPENT GOOD MONEY TO BUY THESE VEHICLES.*AK