Check engine light came on and "low engine power" flashed where the odometer is. this caused the rpm's not to go over 2800. code reader claims o2 sensors or throttle control module or catalytic convertor issues. we discovered it was none of the above. to fix problem change 3 relays located under hood in fuse box. relay #8864. then clear codes, should fix issue unless code persists. relays will cause a fire if not changed out asap.
Tl* the contact owns a 2004 chevrolet silverado 2500. while attempting to reverse the vehicle, it independently accelerated and crashed into another vehicle parked in the contact's garage. the air bags failed to deploy. a police report was not filed and there were no injuries. the vehicle was towed to the dealer, but the failure could not be duplicated. the vehicle was not repaired. the manufacturer was not made aware of the failure. the failure mileage was 95,000.
This happened in the year 2008. everything was fine but when i woke up the following day, the speedometer was pointing at 120mph. in other words, it was a direct reflection from its initial point, which was when it was pointing at or below 0mph.
2004 silverado 2500 hd speedometer not working. it is reading 10 or 20 mph setting still in park. *jb