What I thought was a speaker for OnStar was an ambient air temp sensor with a fan as per help from a lister here. Thanks.


To R&R the unit, I had to find my torx bits as the ones holding the visor are T10. However, there is another fastener that holds the headliner up and that is a T15. One I removed the trim up against the A pillar, the visor and that clip, it was just a matter of popping off the grill on the inside, removing the sensor from the wire with the aid of a screwdriver to push it in while pulling it and then reversing the whole process. I held the sensor on top and pushed in the plastic trim grill from the bottom. The next step was to put the fastener that was in the round hole under the round plastic trim piece to hold the headliner in place and then installed the visor and the A pillar trim piece. Spent more time looking for the T10 and T15 bits than doing the job. The part was made in China but came in a GM labeled bag.


Tom Taylor
2003 Tahoe