The 2022-2026 HUMMER EV Pickup and 2024-2026 HUMMER EV SUV offer the available Infinity Roof (RPO CC3) with four removable, transparent modular Sky Panels and a detachable front I-Bar. (Fig. 5) Each roof panel can be removed independently. The I-Bar over the front seat can be removed as well for open-air driving.
Fig. 5
The HUMMER EV’s rugged styling and squared-off design along with the flat, upright windshield can lead to characteristically loud wind noise in certain driving conditions. However, any wind noise concerns related to the removable Sky Panels may be due to an improper fit or alignment. The unique sky panels and frameless side windows must be aligned properly to ensure proper sealing to prevent wind noise as well as water leaks.
For any wind noise conditions, begin diagnosis be performing a visual inspection of the Sky Panels for a proper fit and flushness. Also perform a visual inspection of the side windows to make sure the glass is oriented properly in the window opening.
Bulletin #25-NA-314 has been released with helpful information about diagnosing wind noise conditions related to the Sky Panels and the side glass.
Sky Panel Alignment
With the sky panels installed, inspect the alignment of the Sky Panels for proper gaps. The specifications for the gaps for the Sky Panel to each header (Fig. 6) are:
- Front Sky Panel to Front Header Gap Fore/Aft: 8.0mm ± 1.5 // 1.0 Flushness: 0.0 ± 1.5
- Front and Rear Sky Panel to Middle Header Gap Fore/Aft: 8.0mm ± 1.5 // 1.0 Flushness: 0.0 ± 1.5
- Rear Sky Panel to Rear Header Gap Fore/Aft: 8.0mm ± 1.5 // 1.0 Flushness: 0.0 ± 1.5
Fig. 6
If the measurements are out of specification, refer to the appropriate Service Information to make adjustments. Incorrect Sky Panel alignment may lead to wind noise as well as water leaks. (Fig. 7)
Fig. 7
Sky Panel alignment is controlled by two receivers on each panel. The Sky Panel can be adjusted cross-car, up/down and fore/aft. (Fig. 8)
Fig. 8
Side Glass Alignment
The frameless door glass must be properly aligned to ensure a good seal and prevent wind noise and water leaks. Inspect each window for correct horizontal alignment as well as the tip of the glass being fully seated into the Sky Panel window weather strip. Refer to either Front or Rear Window Adjustment in the appropriate Service Information for the alignment procedures and specifications.
The height and position of the side door glass for all four windows (Fig. 9) are the same:
A. Glass should penetrate top seal 4.5mm +/- 1.5mm
B. Gap should be 10mm +/- 1.5mm
C. Gap should be 10mm +/- 1.5mm
Fig. 9
For additional information, including examples of correct and incorrect Sky Panel alignment, refer to Bulletin #25-NA-314.
– Thanks to Mark Shearer
