2004 Tahoe 5.3 wont stay running unless im on the throttle. Been sitting for a bit with dead battery/bad connection; fired right up tho. Run fine moving forward, stopped, then died. Started right up, put in reverse, died as soon as it stopped. Started up again fine multiple times, could rev the piss out of it with no issue. As soon as I let it idle it would hover low and die. No SES or Security.