One problem related to battery cable has been reported for the 1997 GMC Yukon. The most recently reported issues are listed below.
Battery leak at sidemount positive terminal corroding cable connection and brake line metal to rubber line connection. Dealer says this is not unusual but no warranty applies except on battery. Battery store says this is common with delco sidemount terminal batteries. Corrossion through brake line connection could cause loss of brake fluid and braking. Corrosion in cable could disable vehicle without warning. Battery was replaced with different model having reinforced case at the terminal. Corrosion on other components neutralized with anti corrosive solution, and brake line tested for leaks. Battery cable replaced.