Have you had the car scanned for codes?If so what are the exact code numbers you have?
March, 6, 2012 AT 11:43 PM
Most likely a bad vehicle speed sensor
March, 12, 2012 AT 6:35 PM
Have you had a check engine light? If so please respond the any codes that have been recorded.
If you don't have a scanner, go to your local AP store and get a free scan. Like the other stated most likely a speed senor.
March, 15, 2012 AT 11:03 PM
This is Tony with 2004 chevy astro with speedometer problem. I changed speed sensor as suggested and problem solved! Thank You fellows nice job.