My sister in law asked about the speedometer on her 09 Traverse not returning to 0 when she comes to a stop. I thought the VSS could be weak or the circuit ground could need cleaned, or maybe the needle motor has lost it's zero. It does go back to zero when she turns it off. I've asked her to download a speedometer app on her phone to see how far it's off at speed. Results are pending.
Does anyone know of any common causes for an 09 Traverse?