by tinpalace » March 4th, 2013, 6:44 pm
i have a 2008 astra 4 door with a moonroof
my was behind the driverside knee bolster
to the left of the steering wheel you have a set of light controls, turn the largest knob to the left position, push it in and turn it up toward 12 oclock, the whole control panel should 'pop' off a bit, then pull it out, unplug the connection and set the panel aside
4 torque screws total need to be removed from the knee bolster, 2 under the light control module you removed,
put the steering wheel in the top position and pulled out to give better access to the last 2 screws. 2 on the top right side of the knee bolster
give it a tug, there is a tension clip on the right side
it will flip down, then unclip from the bottom bar - set aside
you can now see the onstar module (it will have 2 antenna connections 2 white connections, one black connection ) - uplug the two white connections - plug them into your costar module, tuck it up inside