Chevrolet Repair Questions? Ask a Mechanic for Answers ASAP
Welcome, I'm Chris (aka Moose) I'm an independent contractor here at Just Answer.
Since you get a accurate speed signal from the PCM but nothing else is getting the signal. That means its the PCM to blame not sending the VSS signal out.
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Are you sure the PCM is showing an accurate speed signal on a scan tool?
Does the cruise work?
Do you know how to check the VSS signal with a meter set to AC voltage at all the components getting a VSS signal?
See the link below.
Can you unplug all components on this circuit them OHM test this wire to power and ground and let me know if there is continuity?
I sent a diagram last night at 9:41 central.
You unplug the PCM, instrument cluster, radio, cruise, BCM, suspension control module.