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Ask Gm Tech (Cam) Your Own Question
Gm Tech (Cam)
Gm Tech (Cam), Cadillac Mechanic
Category: Cadillac
Satisfied Customers: 29494
Experience:  GM Grand Master Technician 2007. 14 years experience.
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The nav system in my wife's escalade keeps running after the

Customer Question

the nav system in my wife's escalade keeps running after the car is off draining the battery. does the sts nav system compatible i found one for 300 bucks
JA: Have you tested the battery with a voltmeter? And can you see if it's leaking or not?
Customer: no leaks in the battery only 6 mos old
JA: What year is your Escalade?
Customer: 07
JA: Are you fixing your Escalade yourself? What have you tried so far?
Customer: well finally got the old nav CD out as it would not eject
JA: Anything else you want the mechanic to know before I connect you?
Customer: but now it wont shut off
Submitted: 8 months ago.
Category: Cadillac
Customer: replied 8 months ago.
motor to the nav keeps running afyer car is shut off.....
Expert:  Gm Tech (Cam) replied 8 months ago.

Hi there. I am Cam.

I think you are on the right track with the unit itself. The system does not use a different input for ignition, rather it uses network messages to operate. When it fails, this and many other issues can be the result.
You do need to replace the head unit and have it unlocked/programmed at the dealership. AS for compatibility, that you need to ask a dealer who has access to the required part number to answer. I do not have that information available.