1994 Chevy Cheyenne Intermittant Speed Sensor Failure

1994 CHEVROLET CHEYENNE
208,000 MILES • 6 CYL • 2WD • AUTOMATIC
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CYCOMPS
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When I' haveto stop at a stop sign or traffic light and then start moving again, the speedometer stays on 0mph and the truck transmission won't shift. Suddenly the speedometer will jump up to 20mph and the transmission shifts violently hard. Is this the vehicle speed sensor or the vehicle speed sensor buffer that might be failing, and why would it only do it intermittantly? Please advise. Thanks!
Aug 10, 2009 at 8:51 PM
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DOCFIXIT
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Hi Try reading codes , see diagram, Jumper terminal A & B paper clip works. turn key on no start MIL will flash.Like Flash Flash pause Flash is 21. Post will advise Thanks for donate


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Aug 12, 2009 at 8:49 AM