Rear Door Vent Glass Configuration on the Cadillac DTS
Each rear passenger door on this full-size luxury sedan features a fixed triangular quarter pane positioned right behind the movable roll-down window. Rather than bonding directly onto the exterior sheet metal with urethane like a quarter window on a crossover, this unit seats inside the framed rear door structure. It is anchored right alongside a vertical division channel bar that guides the rear drop glass. The piece is manufactured as factory green solar-tinted automotive tempered glass with an integrated encapsulated rubber gasket running around its outer perimeter.
Because the encapsulated seal sits tight against the upper door frame weatherstrip and the horizontal outer beltline moulding, mechanical fitment is precise. In the aftermarket industry, the driver-side rear vent window carries the NAGS part number DV11024 (typically listed as DV11024GTN or DV11024GT), corresponding to GM factory component 25776343. The passenger-side piece is cataloged under NAGS DV11025 (DV11025GTN or DV11025GT). Notably, the driver-side glass shape and moulding carried over directly from late-production 2005 Cadillac DeVille models manufactured on or after February 7, 2005, making the geometry familiar if you work on late K-body and G-platform Cadillac sedans.
Division Channels and Interior Hardware Access
Servicing broken glass inside these rear doors involves more than swapping the stationary pane. The vertical division bar acts as both the front retention boundary for the vent assembly and the rear guide track for the primary drop glass. Whenever a break-in occurs and this glass shatters into small tempered fragments, debris falls past the interior door panel down into the door cavity, often jamming the lower track where the division channel bolts to the inner door frame.
Replacing the stationary unit requires unscrewing the rear interior door trim panel, peeling back the inner moisture barrier, and loosening the lower division channel retaining bolt. Releasing this channel allows the vertical track to shift forward slightly, providing the necessary clearance to disengage the encapsulated moulding from the upper door frame channel without bending the exterior beltline trim. Whenever you get in touch with me to replace a smashed rear quarter pane on your sedan, I can usually be at your car within an hour of your booking with the correct aftermarket tempered replacement in hand.
There are no electronics built into these small rear door panes. Unlike the large heated back window, which carries the grid lines for the rear defroster alongside the integrated radio and diversity antennas, the rear vent units are strictly passive glazed panes. They contain no embedded antennas, defrost wiring, or sensors.
Does this rear side window roll down or vent outward?
No. The glass is completely stationary. It sits fixed inside the door frame behind the movable window glass and is locked in place by the framed door header weatherstrip and the vertical division channel.
Can broken glass in the vent frame affect the main power window?
Yes. Because the division bar separating the two pieces of glass forms the rear runner for the main door window, broken tempered shards frequently drop into the bottom run channel. If the division track is knocked out of alignment during an impact or clogged with debris, the main window regulator will bind or drag when rolling up.
Is the glass tint different on the Performance or Platinum editions?
No. Regardless of whether the car is a base model, Luxury, Premium, or Platinum trim with the Northstar LD8 or L37 V8, all factory rear door vent panes share identical green solar-tint specifications across the entire production run.
