Do you mean that absolutely nothing works when you turn the key to the ON position? Does the Driver Information Display (DIC) light up? Do you hear a chime sound when the key is ON and the LF door is open?
Simply replacing a battery is not the reason your engine will not crank. There has to be 'something' you left out of your original statement.
Why did you install a new battery?
Is the new battery the proper Group 79 replacement?
Are the battery cables clean and properly torqued?
A lot of questions but I need the answers before we can proceed.
I have a silly question . I got messed over getting my red Eldorado TC...... BUT!.... I got a Sable Black one. I’m not complaining lol. I’m nervous about the 93k miles though. My question is this
What is the proper function of the tail lights? Does the whole side light up for the brake/turn...