01 speedo

The battery on my voyager was dead for a little over a week. After I got it started the speedo was acting crazy. The needle is on the wrong side of the stop. It is like it went past 120 and stuck. Tried everything I can think of. Needle goes against stop when key is on like it moves to zero when it is on the right side of stop, and backs off like it is moving against the stop when key is off. Does any one have any suggestions I thought about taking pos bat cable off to try and reset bcm and ecm also. Then I thought to take inst panel out and try to take plastic cover off and move needle where it belongs. I need help

This problem crops up every now and again. See post #3 on the following thread:

Speedometer Calibration (http://www.automotiveforums.com/vbulletin/showthread.php?t=727317&highlight=speedometer+calibration)

Thanks that seems to have fixed it. It atleast registers at zero now. I have not driven it yet