Identifying the Correct Rear Quarter Window on Your Enclave
When you look at the stationary glass behind the rear passenger doors, identifying the right replacement comes down to matching the factory privacy tint and side of the vehicle, because Buick streamlined this window across the entire lineup. Whether you drive a base Essence, a mid-tier Premium, or an Avenir with the monochrome exterior package, the rear quarter window uses factory solar-absorbing dark privacy glass without any variations for electric defroster lines.
Every second-generation Enclave built on the C1XX platform utilizes fixed, direct-glazed glass between the rear door opening and the D-pillar. While Buick relies heavily on its QuietTuning laminated glass for the windshield and front side doors to deaden road noise, the quarter glass is standard solid tempered glass. When I inspect the broken panel at your driveway or workplace parking space across Toronto and the GTA, I verify that the pre-attached lower beltline moulding matches the black perimeter encapsulation that blends directly into your Enclave's floating-roof aesthetic.
| Glass Position | NAGS Reference | Current GM Part | Superseded Numbers |
|---|---|---|---|
| Driver Side (Left Hand) | DQ12956 | 84402103 | 84294729, 84312732, 84348831 |
| Passenger Side (Right Hand) | DQ12957 YPN | 84402104 | 84294730, 84312733, 84348832 |
Interior Trim and Antenna Grid Variations
While the exterior footprint remained identical from 2018 through 2024—including the 2022 mid-cycle front and rear fascia redesign—there is an internal detail owners often wonder about when their side window shatters. Depending on the audio and infotainment package fitted to your Enclave, the quarter glass may incorporate embedded radio diversity antenna elements routed directly into the vehicle's rear receiver modules.
- Third-Row Interior Clearance: The inner pinchweld is surrounded tightly by the large molded third-row lower quarter trim panels and the plastic upper D-pillar covers. These interior components sit flush over the glass edge and must be partially released inward to reveal the factory alignment locator clips.
- Integrated Beltline Trim: The bottom edge of the replacement aftermarket glass incorporates the exterior gloss lower beltline moulding, ensuring the chrome or dark trim line along the doors carries continuously to the tailgate corner.
- No Rear Defrost Elements: Unlike the liftgate glass, the quarter glass panels do not carry a grid for defogging; any fine metallic lines you notice on the driver or passenger side are dedicated solely to communication and radio reception.
General Motors updated the service part numbers for this stationary glass multiple times throughout the production run, ultimately settling on 84402103 for the driver side and 84402104 for the passenger side. Matching these against NAGS numbers DQ12956 and DQ12957 ensures the pre-assembled encapsulation aligns precisely with the body contours and interior garnish mouldings.
