I have an 02 Chevy Trailblazer
I went to start my vehicle up like normal before work. When it was in accessory it was fine but when I tried to turn it over, it all went black. There was no power at all. Couldn't take the key out of accessory. Lights came back on a minute later and I could turn the key. When I tried to start it again, it once again, died. Key locked in ignition. Open the hood and the lights came back on. I tried one more time, Turned over no problem. I did notice, once it was started the battery gauge was rocking between 14 and 17. ( 1/2 way up the gauge and almost 3/4 up the gauge) Lights were flickering whenever I used something electrical ( radio or windows).
Drove it to work just fine turned it off went to test to see if it was gonna glitch, and you guessed it, dead. Wouldn't release the key. Finally lit back up and pulled the key out.
I don't know if it has anything to do with it but today my engine light came on and got a code: P0420 - catalyst system efficiency below threshold. SOMEONE PLEASE HELP!! I just replaced the transmission and really don't want to junk it.