This bulletin applies to 2012-2013 Buick LaCrosse vehicles. There may be an MIL on, battery Indicator or Service Charging System message on, with any combination of DTCs P1EAB, P1B33, P1B34, P1B35, P1B36, P1B37, P1B38 or P1B39.
Battery Testing 2.0: That Clicking Sound Doesn’t Always Mean a Bad Battery
Sometimes diagnosing a no-crank/no-start problem can be more difficult than diagnosing a driveability problem. The average passenger car or light truck has at least two dozen electronic control units on-board, and luxury vehicles can have three times that many. Some of those tiny electronic brains can make a decision that will drain the battery almost overnight.