2005 1500 LS 5.3 Vortec Gas - has new alternator and battery. 2 issues randomly will lose acceleration (throttle)power while driving, usually can see battery gauge flutter right before. Throws code U0701, you can unplug the connection to the throttle body, clear code and it will run like normal. 2nd issue battery drains when sits over night even after being driven, but not every night