Jeep Grand Cherokee sunroof care

The WK2 Grand Cherokee is the classic "it's not the sunroof" case. Drains do clog, but owners repeatedly find the real source is the A/C drain, a firewall seam, or the windshield bond. Work through those before tearing into the roof.

Jeep Grand Cherokee, WK2 (2014-2021).

Clogged drains

Four corner drains exit at grommets behind the felt fender liners. A useful non-obvious detail: the lower front drain hose is not in the wheel well where most people look. It routes through the A-pillar and is hidden behind insulation near the driver-side kick panel. The rear hose runs just above the side-curtain airbag. Clean the rear drain from the tray opening at the top and leave it at that: reaching it from inside means disturbing trim next to a live airbag module, which is a job for a shop with the model repair procedure. Clear gently with a soft drain brush, then flush with water. Do not feed trimmer line or stiff wire down the tube and do not use compressed air: the tubes are a slip fit, so both can pierce a tube or pop it off inside a pillar.

Sunroof Drain Cleaning Tool (10 ft)Soft and flexible, sized for the drain tubes.

View tool

Two things Jeep has documented, and neither is a clog

TSB 23-102-23 applies to the 2021-2023 Grand Cherokee (WL) with the dual-pane panoramic sunroof (sales code GWJ), built on or before 6 February 2023. Its customer symptom is simply "Dual-pane sunroof is leaking", and the cause it names is the wind deflector assembly getting trapped in the sunroof panel. The repair is an updated wind deflector, not a drain service. If you have a WL in that window that leaks, this is the first thing to raise, because no amount of drain cleaning will fix it.

STAR case S1623000034 Rev. A, released November 2021, covers water at the overhead console, A-pillar or headliner and wet carpet caused by a front or rear sunroof drain tube that is missing or misrouted. In other words the tube was never right, rather than having clogged. ⚠️ Two honest caveats: a STAR case is a record of previous cases rather than a repair authorisation, and this one carries no model-year list, so it cannot by itself tell you whether your car is in scope.

When it is not the sunroof (usually)

• A/C condensation drain under the cowl (passenger side) onto the front carpet.
• Firewall pinch-seam with an unfinished or voided weld, onto the floorboard. Owners have fixed it by sealing the seam.
• Antenna / roof-seam grommet into the cargo area or overhead console; and the windshield bond at the A-pillar.