Last year I bought an 08 suburban 2500 with 51,000 miles. Body in excellent condition. I planned on using this to tow my trailer and be an everyday driver for my wife for many years to come. It ran an...
It's entirely possible that the battery was causing the problems. It may have been shorting internally and causing the main circuit breaker (previously known as the fusible link) to trip. That would kill power to the whole vehicle and after it auto-reset all would be fine again.
That intermittent short finally got bad enough where it wouldn't hold a charge and the battery died.