GMC HUMMER EV Forum | HummerChat.com banner
1 - 9 of 9 Posts

·
Registered
2019, Chevy Volt, Voltech with 7.2 kW optional Charger
Joined
·
1,260 Posts
This is probably the 2nd battery pack to have issues. GM is probably taking the whole pack for easy diagnosis. In the future they will just replace the bad module. Each module now has its own BMS instead of just a single one for the whole pack.
 

·
Registered
GMC Gas / Diesel / EV Technician
Joined
·
59 Posts
Mine is currently at the dealer service with a "Service high voltage system" message. open case with TAC but it has already been a few days. Everything works as usual but the message concerned me.
Thats basically same as a check engine light, could mean a million things. GM and TAC move slow with all the moving parts. They will send out an Engineer to do a few data dumps then finally allow the technician to work on it. Mine took 20 days approved for me to diagnose and to get a coolant heater module replaced when it was all said and done. GM just really wants to ensure they dont miss something that could possibly be a reason for failure that may help improve the product. Hopefully your vehicle gets fixed quickly.
 
1 - 9 of 9 Posts
Top