I've got a 2007 cadillac sts and when i close the sunroof the back drops down

SOURCE: I need a cadillac seville sts 1998 4.3L & 32

Try Item #1 first it is the easiest.
Then Check the small water pump belt, it is not the serpentine belt.
The next step is to either check the Block with the following block tester available from NAPA
The part number is 700-1006
or change the thermostat dealer cost about 60.00 AUTOZONE about 40.00 You will need to purchase the Gasket with which ever you purchase from.

I had written a detailed note and the system dropped it. I hope this helps. coolant system drawing is available from:
http://media.photobucket.com/image/coolant%20system%20cadillac%20sts%201998/Parallax1/NSCoolingSystemCircuit.jpg

SOURCE: I have a 1999 Cadillac STS. I wouldnt start until

Your parking solinoid is faulty.

SOURCE: my 2000 cadillac sts sunroof leaks on the

Chances are its the seals or rust. Check the top and see if it has any gaps... It may just be able to be repaired with a bead of caulk

SOURCE: the sunroof wont close automatically- when the

That has NEVER been an option on any cadillac since 1965 fo sure. If it was then it was some off the wall aftermarket item. If so then they need to fix it

SOURCE: 1998 Cadillac Seville STS SERVICE ENGINE

Ok, bank 2 sensor 1 is the front one upstream sensor.--------- It's between the engine and the fire wall. it's pre catalitic converter. There is very little room. It's best to see and work on from drivers side fender.
---------------- Bank 2 Sensor 1 is on the driver side - follow the right side of the engine down the headers which attaches to the catalytic converter. The o2 Sensor you're asking about (Bank 2 Sensor 1) is before the Catalytic. The o2 Sensor after the Catalytic is Bank 2 Sensor 2. Bank 1 Sensor 1 is on the passenger side as well as Bank 1 Sensor 2.---------- --------- Approx cost for sensor only is near to 40$ and for replacing service charge by the mechanic will be more.--------The total cost will be under $100.------ To order the sensor, click the link below:-- http://technoanswers.blogspot.com/2011/08/o2-sensor-for-cadillac-seville.html --------- This should help.Thanks.Helpmech.