No worries about that at all; if you leave doors open or lights on, they will shut off in about 10 minutes. It resets if you close that door and reopen it This information is all in your owner's manual.Any Blazer owners create their rig into car camping?
Curious if you leave the hatch open if it will drain the battery overnight?
Curious if some have done so to see what they have done. I found being 5’11” I can lay down in back folded down seats quite comfortably ..