Anyone have problems with their speedo and oil pressure gauge acting up. I have a 2004 silverado w/ 4.3L V6. Speedo will either be way high compared to actual speed or low, will reset most of the time when ignition is turned off and then restart truck. Oil gauge just reads low and will reset. I also had issues with the A/C Knob the other day, it would only work on setting 4 and no others then it started working after some time. Thanks in advance.