Sunroof issue

[Eidolon]

Alright, info.

Choices: 1.) Kill your brother. BTW, get the $$$ from your brother first, then follow choice number 1. Good Luck

I don't think his brother broke anything. He just pinpointed the issue by altering the seal of the sunroof with the car's roof.

With that, two things:

1) The G8's sunroof module - by which I mean the entire, installed assembly - has a drain tray to catch rainwater that makes it through the seal and funnel it out of the car through drain hoses. This is because the sunroof seal is not perfectly tight, anyway. To do that, it'd have to overlap with the roof, which wouldn't look quite so neat. So as a backup - and also likely to cover themselves against lawsuits if an owner left the roof open - there's a catch tray that surrounds the sunroof and drains outside the car.

Proof? Here's a diagram of the sunroof module from the factory service manual.



So your car's not going to become a mildew-ridden bucket in the meantime.

2) While the sunroof CAN be physically adjusted, it's as likely in this case that your sunroof control module simply didn't fully close the roof. It may need to be re-timed.

You see, the sunroof control modules in our cars don't work by sensors that pick up where the roof is. Instead, when your car leaves the factory, it's run through an initialization process. This process allows the sunroof control module to figure out how long it takes to open your sunroof, specifically to the full vent position, and then extrapolates from that time value to figure out how long it takes to move the sunroof to any position.

Luckily, you can re-run that initialization procedure yourself. Here it is below from the factory service manual. Give this a go before taking the car in to the dealer.

[Metal Man G8]

Hello Metal Man G8,

This issue sounds like a frustrating thing to deal with. I can see that you have received some sound advice too and I would like to offer my assistance to you as well. If you like, I can help find you a dealership nearest you and also help make your appointment with them. This is a great place for a solution to your problem. I would just need some information from you like your full name, address with zip code and your VIN# and vehicle mileage. Let me know, here to help.

Reggie B.
GM Customer Care

I sent you a pm get back to me when you can.

The sunroof is not a factory unit. On the sunroof control is the name inalfa. Would this have been dealer installed?

[Metal Man G8]

Just wanted to thank GM customer service for setting me up with an appointment to a dealer close by and I think helping me towards gettin this taken care of really quick.

Turns out it was a simple adjusmtent that needed to be made. I did have to drive all the way to south west houston to get it done but I was in and out in 20 minutes.

[Metal Man G8]

I got that's why I'm a little late on the reply lol

[GM Customer Service]

Just wanted to thank GM customer service for setting me up with an appointment to a dealer close by and I think helping me towards gettin this taken care of really quick.

Turns out it was a simple adjusmtent that needed to be made. I did have to drive all the way to south west houston to get it done but I was in and out in 20 minutes.

Thank you Metal Man G8! It was a pleasure helping out, anytime!

[GM Customer Service]

So today was my first long trip in the g8 and wow the wind noise from the sunroof is horrible! By luck my brother decides to push up on the stupid thing from the inside and boom the noise is gone. Once we get out we see the sunroof sits below its seal towards the back of the car. This worries me because if it rains it will for sure fill with water. What can I do? Last resort is removing it all together but can this be fixed? I will try to get a pic as soon as I can. Anyone notice this before with thier g8?

Any updates on this noise concern Metal Man? How is the vehicle operating?

William R.
GM Customer Care