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...
If I am reading this correctly the OP is not really saying the ECM is resetting (how would they know that) but that there is an intermittent electrical loss long enough to reset the radio time. Ben's suggestion would support that.