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Check the VSS sensor for the road speed code. It is acting up. The high voltage code from this can be a failed sensor or a short in the harenss. I would try the sensor first since these trucks are bad on them followed by the pigtail. If the code remains, then check the back of the cluster and the ECM for that signal wire is bad with overheating on these and melting at one or the other plug.
The accelerator pedal sensor needs to be changed. It isn't reading the position or there is a dead spot in it. The FMI 3 is voltage above normal. I usually replace the sensor for the pedal and this code clears itself.
The EGR is just that, a bad EGR valve. the FMI 7 mechanical failure means it has failed. It will need to be changed.
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