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Hello, so can you please tell me what issues were fixed and what you still have a problem with?
If the speedo isn't working correctly if the speedo isn't working correctly then that can cause the cruise control not to work correctly. If the alternator is making weird noises it can be sending electronic feedback signals messing up the VSS signal.
The alternator gives off EMF and when they fail they can give off more than normal noise. This can cause electrical signals to become erratic if bad enough. I would for sure have the alternator tested first.
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