Chevrolet Silverado and GMC Sierra 1500
Silverado and Sierra
Silverado LD and 2500/3500
Sierra Limited and 2500/3500 models
Some customers with the above vehicles may comment on excessive wind noise coming from the front side-door glass area. The condition may be caused by:
- An improper fit between the front side door and the roof
- An incorrectly installed front side-door window weatherstrip
- Openings within the sheet metal of the upper door frame
The following can help identify the source of the noise and how to resolve it.
- At the two locations shown in the illustration, inspect the front door fit as to meeting the suggested 1–2 mm (0.040–0.080 in.) sub-flush dimension.
- In conditions where the door header is outboard the design intent, a 1–2 mm (0.040–0.080 in.) change may be accomplished by bending the door header inboard. Note that this procedure is only suggested for technicians who are experienced in finessing sheet metal.
- If bending the header does not resolve the condition, adjust the door fit by replacing both side-door upper hinge bolts with service bolts (GM part #11561763) that allow for more adjustment. Tighten to 25 Nm (18 lb.-ft.) while applying inboard pressure to the door.
- Next, remove the front door trim panel, garnish molding, outside rearview mirror and belt reveal molding. Refer to Front Side Door Window Belt Reveal Molding Replacement in SI.
- Remove the front window inner sealing strip, front window and the front side-door window weatherstrip. Refer to Front Side Door Window Weatherstrip Replacement in SI.
- Inject Kent® Ure-Foam Expandable Foam Sound Deadener #P10630, or an equivalent, into both metal glass run channel openings of the upper door frame. (See SI Bulletin #17-NA-258 for step-by-step instructions.)
- Next, using Kent® High-Tech Clear Seam Sealer #P10200, or an equivalent, add seam sealer to the door pinch weld flange to totally seal the outer and inner sheet metal at the top of the door header. Let dry and remove any excess residue.
- Inspect the upper door frame metal glass run channel — just forward of the B pillar — for possibly being out of design location.
- Add a 2mm-thick foam shim to prevent the rubber glass run channel from getting installed too deep.
- Reinstall the front window inner sealing strip, front window and the front window weatherstrip. Refer to Front Side Door Window Weatherstrip Replacement in SI.
- Reinstall the front door trim panel, garnish molding, outside rearview mirror and belt reveal molding. Refer to Front Side Door Window Belt Reveal Molding Replacement in SI.
For additional information and illustrations on resolving this concern, refer to SI Bulletin #17-NA-258.