After leaving truck sitting for several days without being driven, the battery would be so flat that it appeared to be disconnected. I noticed this always seemed to coincide with a red status light on the OnStar system. After this happened several times, I took the truck to the dealership and asked them to update all computer software. This appeared to fix problem (it has not happened since).
A D V E R T I S E M E N T S
After leaving truck sitting for several days without being driven, the battery would be so flat that it appeared to be disconnected. I noticed this always seemed to coincide with a red status light on the OnStar system. After this happened several times, I took the truck to the dealership and asked them to update all computer software. This appeared to fix problem (it has not happened since).
- tom_oh, Hamilton, OH, US