Forum Discussion
Onstar telematic communication module Defective.
Mine is not working anymore too and part still on backorder.
Please give us the part number for the module so I can try to source it myself.
I am also looking to find the GM/Onstar defective telemetric module part number. I've just spent an hour looking for it, and although I could find info on many modules, anything with Onstar in the search returned, "We couldn't find anything for "onstar”. I would also like to know the country of origin for the module. Could GM be playing us and delaying the replacement process to avoid paying a tariff of anywhere from 100-250%? If they delay the process until the courts or Congress repeal the tariffs, it could save them millions of dollars.
This may involve two different modules: a Serial Data Gateway Module and a telematic module.
However, GMC has a Customer Satisfaction Program, GM# N242435631. Through this, your dealer should be able to repair it for you free of charge, and your OnStar functionality will be restored after the repair.
My vehicle is a 2025 GMC Acadia bought 6 months ago under manufactures warranty. The dealership that diagnosed the problem stated the part to effect the repair of the OnStar system is on backorder and the cannot provide us any estimate for when the part will arrive or the repair will be completed.
We appreciate you bringing this situation with your 2025 GMC Acadia to our attention. We understand how frustrating it can be to have limited access to the vehicle you rely on during this delay. We’d like the opportunity to learn more so we can provide an additional layer of support alongside your servicing dealer and offer insight regarding the part order.
To move forward, please send us a private message to OnStar_Support with your full name, OnStar account number, VIN, current mileage, and the name of your participating dealership. Just click the envelope icon at the top right of your screen to get started. Our team will be monitoring for your response and looks forward to assisting you soon. By sending us a message, you consent to the information you provide being monitored and recorded by GM or those acting on GM’s behalf, subject to the GM Privacy Statement: https://www.gm.com/privacy-statement.