at speeds 50 plus sun roof open or closed i have a lot of headliner noise rattleing vibration and noise up around front pillars anyone else with this issue or no what the problem is thanks

 

Greeting from a former sunroof installer from Arizona:

There are multiple possible causes of the symptoms you've described.

First of all I have to ask; does your Hummer have an aftermarket sunroof or a factory sunroof?

If it's an aftermarket sunroof, here is where I would start troubleshooting;

(1) With the sunroof in the fully closed position, push up on the center of the sunroof glass to see it it moves up and down freely. Even if it moves up and down just a little bit, this means that the torx screws that hold it in place may be loose or need adjusting. OR, the gasket/seal around the sunroof glass itself may no longer be sealing tight enough to hold the glass while driving. Do you get any wind noise while driving? Another indication of a bad seal/gasket.

As you drive, the normal wind buffeting will cause the sunroof glass to rattle incessantly up and down. With the sunroof open, it makes for an even looser fit and just as much or more rattling.

(2) You mentioned rattling inside the headliner. This may sound like an off-the-wall question but, did you recently have your front windshield replaced?

On rare occasions, (not so rare where I used to work) the glass installer will not put enough urethane adhesive in the upper edge of the new glass. This can allow just enough air to flow into the underside of the headliner to cause
some of the rattles you may be hearing.

(3) This is the [SIZE="5"]biggy[/SIZE]: This is the most time consuming procedure for isolating the cause of your headliner rattles. It's also the best way.

(a) Put your sunroof in the fully closed position. With a roll of 2" wide masking tape, place enough tape along all the seams of the sunroof to completely seal it.
What you're trying to do here is completely seal off the sunroof and in effect, eliminate it as the cause of any rattles.

(b) Using that same roll of masking tape you seal off the edges of the front windshield as well. All along the top and side edges.

(c) Now you go for your first test drive. Listen to see if you still get the same rattles you heard before. If not, that's a step in the right direction.
If rattles persist, check the roof mounted marker lights to make sure they are not the cause of the rattles.

(d) Assuming that the rattles have stopped or at least have been sufficiently mitigated by sealing off the windshield and sunroof glass, you then go for your next test drive.

Before taking off, you remove the stretch of masking tape from along the top edge of the windshield. Leave the rest of the tape in place and test drive again. Listen for any differences in noise levels/rattles.

What you're doing is systematically removing one piece of tape at a time and test driving to eliminate that particular part of the equation as the source of your rattles.

After you've removed and test driven all the tape on the windshield, you move on to the tape on the sunroof. You do the same thing there. Take one piece of tape off at a time and test drive.

From the descriptions you gave about the rattles I would suspect that the rubber gasket that fits onto the outside edge of the sunroof glass is the source of your rattles.

If it's a Webasto aftermarket sunroof, there are two types of replacement gaskets; the old style and the new style. The new style gaskets are notorious for going bad in short order. The old style gaskets can often time be shimmed out to give a tighter fit for the sunroof glass.

I couldn't begin to count all the hours I spent in various car models trying to pin down the source of headliner rattles. The procedure I've outlined above always seemed to work for me. I hated doing it cause it took so much time but, it always seemed to work.

Finding the source of any rattle in a Hummer H2 is alot like trying to find and annoying cricket in your home. The rattle sound like it's coming from a certain location in the vechicle but, when you get your ears near that location, it then sounds like it's coming from somewhere else.

It can get really frustration.

Upholstryguy

 

What if it is an OEM sunroof? When mine is closed I can push up on the back or front of the glass and it moves up 1/4in. It is noisy on the hwy because of this movement. Could the rubber around the glass have shrunk over time?

 

Man; I haven't been on this site since 2009. I forgot I was even a member here till I got an email notifying me that someone had resurrected this thread.

The last time I worked on a sunroof was back in 09 but, from the description of your sunroof problem, it sounds like the screws on either side of the sunroof have loosened up somehow. This, and perhaps the rubber seal around the glass has worn to the point where it no longer seals and holds the glass in the proper position.

It's almost impossible for me to tell unless I were to see it for myself.

It's been so long that it's hard for me to remember exactly what they look like anymore.

Looking at the sunroof from inside the car, near the front of the outer edges there should be from two to three sets of screws that secure the pivoting arms of the glass in place. It's these screws that may have come loose over time. Their usually torx screws. They may be underneath some plastic trim covers so that they're not readily visible. Just remove the plastic trim to access the screws.

Once you get your screw driver on them, you'll be able to tell if they've come loose or not. Don't over-tighten them. They strip out fairly easily.

I'm sorry I'm not able to give you a more definitive reply. Without seeing it for myself, I'm really just guessing. With factory sunroofs, even an easy fix can seem daunting if you don't know what to look for. I'm afraid that trying to describe a simple fix with the written word makes it seem even more daunting; even if it's just a matter of tightening some loose screws.

Upholstryguy