2007 gmc denali. Replaced with oem alternator /bosch reman.all of top quality and even the original all do the same thing.only has 65,000 miles on it.new battery,new from dealer batterty current sensor. Light has no ryme or reason to be on at times.it charges fine and never have had weak battery issues. Alternators were a guess and all the other parts as well.whats next.