03 caddillac cts sunroof wont open

1. Place the ignition switch in the ON position.
2. Push and hold the sunroof switch toward 2 . Once the sunroof has reached the full tilt position, release the switch. Push and hold the switch toward the 2 position again. After a delay of four seconds, the sunroof will make a small movement and backup.
3. Release the switch.
4. Within 5 seconds of releasing the switch, push and continuously hold the switch toward 2 . The sunroof will move from the tilt position to the open position and back to the close position.

Here's a description the sun roof
Power Sunroof System Components
The power sunroof system consists of the following components:
• Sunroof module
• Sunroof switch
• Sunroof motor, with 2 hall effect sensors and limit switch
• Sunroof window
• Sunroof sunshade panel
• Power supply for the sunroof module: RAP 25 A
• Ground G402

Override
The override function is used when needing to force a closing of the sunroof window. To override the system:
Turn ignition to ON.
Rotate the sunroof switch to the close position.
Press upward.
The sunroof switch data 6 circuit, or override circuit, will become grounded at the sunroof module. As long as the sunroof module sees this input, it will continue to slide the sunroof window to close, regardless of the other sunroof switch data circuits inputs.

Visit the on-line store, know as reliable-store, they have the repair manuals. I'm sure you will get the solution of your problem.
Best Manuals

Could be the sunroof regulator went out

Hi Gary,

Apparently there has been some 'alignment' issues with the sunroofs coming out of Cadillac. As noted in the attached thread, the dealer can perform an adjustment which eliminates (reduces) the windnoise.
08 CTS Sunroof Fix Wind noise when closed

Good luck

Mine did the same thing...took me 8 years to figure it out without having to pay for a repair at a shop. When it lifts the centimeter on its own, push up on glass with your hand with moderate pressure till it frees up, then just push the button towards the rear of the car and it should open the sunroof completely! How i now have to open mine but its awesome after 8 years and Ill work with that...

Some sunroofs have a open switch like the drivers window. You push it and the window will open automaticly. The button on your sunroof could be jammed so even though you can close it as soon as you release it, it will auto open on it's own.

03 Jeep Liberty sunroof wont close. I have 4 sunroof buttons; Open, Close, Vent and ASC. Open and Vent buttons are working fine. Close button is not responding. ASC button is flashing red and green but does nothing when pushed. I have no way to get it closed

that is easy to fix. change the sensor

Open the sunroof and keep on pushing the open button for 10 seconds. Close it and keep on pushing the close button for 10 seconds. That should do the trick if every thing else in the roof is ok