when you drive it it surges and the speedometer does not work?

1998 GMC SAVANA

150,000 MILES • V8 • 2WD • AUTOMATIC

RMORRIS1824

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this van sat for a year with a dead battery. i got it running and now when you drive it it surges and the speedometer does not work. what could be causing this... i am thinking maybe the speed sensor is not working and throwing the computer out of whack. i dont know where it is located.. or what else could be causing the problem?
please help!
thanks,
ryan

Apr 5, 2010 at 7:04 PM

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SHELBYDOGG

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I have the same problem after the van sat for a couple of months with a dead battery. It surges, the speedo reads too fast and the anti lock light and system seems to be causing the surging sensation. I took mine to the dealer to diagnose and they replaced the VSS.

Jun 20, 2010 at 11:21 PM