parasitic drain

2008 Envoy SLT.. 6 cyl. Parked the car after coming home from work and the next morning it was totally dead. No dome lights or dash lights. Once I put the key in the ignition I could not remove it. Battery was a 2012 and I replaced it thinking a 7 year old battery was the issue and at first it...

204 gmc sierra sle ext cab 5.3ltr 4wd.i used the test light from the battry post to the battery cable and it shows a drain.why wont the test light go out when i remove each fuse one at a time.shouldnt that isolate the bad circut?so i could chase it from there.did the fuse remove thing on both...