GMC Troubleshooting Questions? Ask a Mechanic for Answers
Hi Im David, thanks for visiting the site. Here is a TSB that the dealer should have been fully aware of and needs to comply with
if the stabilitrak system pick up an unsafe condition such as excessively swaying, which Im not saying thats what the hummer is doing, but if the computer thinks it is, its quite possible the ebcm is malfunction and could cause the stall.