Thanks to members for prior help with other issues. Have an 04' GTP. 70K miles. Replaced battery about two years ago with an AGM. Car worked fine. Has been in the garage during the past two months without starting, during the bad weather. Went to start it, turned key, nothing. No dome lights when opening door, no chimes, no lights on dash, no fuel pump, absolutely nothing. Battery terminals clean and tight. Put trickle charger on to fully charge battery. Turned key nothing. Any ideas? thanks in advance for any information and input.