I recently bought a 2011 Chevy cruze and stayed having issues. It starated with the passenger window going down on its own. At first it would go right back up and now is delayed for several minutes before it will go up. Then the radio started flashing on and off randomly and the abs and maintenance traction control lights keeps appearing. Then the last few week the cat has been slow at cranking this morning it wouldn't crank at all the first two attempts them it started up. My battery voltage reads 15.4 always id that matters.