89 4x4 speedometer problem
 

In the process of restoring a 89 silverado 4x4. The speedometer works sometimes and sometimes not. Any info on this would be much appreciated. Thanks

RE: 89 4x4 speedometer problem
 

I have the same problem.

[:o]

Replaced the speed sensor. No change. "Check Engine" light comes on too sporadically when the speedo don't work.