Speedometer stops workign it doesnt shift when it jumps up and starts workign again it shifts fine, i've replaced the speed sensor and it didnt help, anyone got any ideas? 1999 bravada btw
Check the speed sensor again and make sure that the wire harness is not damaged in any way. Go to a Auto Zone and have them rescan the DTC codes and see if the VVS has gone bad from time to time in the history. Check the wire harness to the ECM on the passenger side in the engine compartment by the overflow tank. Make sure there are no damages to the clips and wires. Other then that it could be a bad sensor that may have been installed. Good luck and hope this helps.
Check the throttle position sensor, make sure that is reading good to. If you can find someone or if there is a good transmission shop with a tech2 scanner, that would help greatly to finding out what issues your transmission has. Good luck and keep me posted, be glad to help you get your Bravada running 100%
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went thru the whole thing and no luck. i can manual shift from 1st to 2nd i noticed but it wont go into third but if i gun it i can skip third it seems to shift to 4th (drive) thats when the speedometer seems to kick in. if i let off the gas it downshifts and revs and the speedometer drops out when it drops to 30 mph. pulling out my hair on this one anymoe help i'd appreciate it. the sensor is putting out the pulse and the 5v test seems ok.
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