mickeytee
Seasoned Member
If you don't have a speed limit code or a service ride light then bilsteins or the preferred by me z06 upgrade GM shocks with simulators will not set that code. If you do have the code shocks won't fix it . so if your tech two is showing voltage change with movement then the module is most likely ok. Usually only one shock locks up or gets firm while the others get soft. You could just unplug the shocks and see how the ride is but you may have to reset the module with your tech 2 after you plug them back up. You can disconnect the travel sensor from the a arm and manually move it while observing the voltage on the tech 2 to confirm they are all ok. When one is bad it usually sets a code