06 GMC 3500 the sun roof worked fine until yesterday, It will close all but the last 3/4in. where it drops down to be flush with roof line. Checked the track and all is clear and looks to be well lube. Anyone else run into this issue?? thanks for any help. Safe travels.
Jim and Linda said
04:21 PM Nov 3, 2013
Hi Chris,
If your sunroof is factory-installed, the following steps may help.
To “reset” the sunroof control module, first make sure the key is out of the ignition and the driver’s door is Open. Then remove Fuse S/ROOF (25amp) from the underhood electrical center (located on the driver’s side - there is a label on the underside of the cover indicating the fuse location) and leave it out for at least one minute. Reinstall the Fuse. Then try operating the sunroof.
If this doesn’t work, I know you didn’t replace your sunroof, but the procedure below taken from GM Service Information may reset your sunroof operation.
Sunroof Motor/Actuator Synchronization The sunroof control module uses position sensor inputs to establish soft stop locations for the sunroof panel several millimeters ahead of its physical limits. After replacing sunroof system components which may affect the position of the glass panel to the seal in the closed position, the soft stop locations must be reset. Perform the following steps after the repairs are completed.
1. Close the sunroof to the current soft stop location. 2. Press and hold the sunroof switch in the close position. 3. After 2 seconds the sunroof panel will bump to the hard stop. 4. Continue holding the sunroof switch in the close position for 3 full seconds after the sunroof panel has hit the hard stop. 5. Press and hold the sunroof switch in the open position until the sunroof panel stops in the full open position.
Hopefully one or both of these procedures will solve your problem!
CJSX2fromCT said
08:52 AM Nov 4, 2013
Jim, thanks for the response. Did some googling on it and found that there are settings or presetting. I got it to close fully.
06 GMC 3500 the sun roof worked fine until yesterday, It will close all but the last 3/4in. where it drops down to be flush with roof line. Checked the track and all is clear and looks to be well lube. Anyone else run into this issue?? thanks for any help. Safe travels.
Hi Chris,
If your sunroof is factory-installed, the following steps may help.
To “reset” the sunroof control module, first make sure the key is out of the ignition and the driver’s door is Open. Then remove Fuse S/ROOF (25amp) from the underhood electrical center (located on the driver’s side - there is a label on the underside of the cover indicating the fuse location) and leave it out for at least one minute. Reinstall the Fuse. Then try operating the sunroof.
If this doesn’t work, I know you didn’t replace your sunroof, but the procedure below taken from GM Service Information may reset your sunroof operation.
Sunroof Motor/Actuator Synchronization
The sunroof control module uses position sensor inputs to establish soft stop locations for the sunroof panel several millimeters ahead of its physical limits. After replacing sunroof system components which may affect the position of the glass panel to the seal in the closed position, the soft stop locations must be reset. Perform the following steps after the repairs are completed.
1. Close the sunroof to the current soft stop location.
2. Press and hold the sunroof switch in the close position.
3. After 2 seconds the sunroof panel will bump to the hard stop.
4. Continue holding the sunroof switch in the close position for 3 full seconds after the sunroof panel has hit the hard stop.
5. Press and hold the sunroof switch in the open position until the sunroof panel stops in the full open position.
Hopefully one or both of these procedures will solve your problem!