Some 2025-2026 ESCALADE IQ models may have a 3rd-row seat that cannot be operated using the 3rd-row seat switches in the cargo area. (Fig. 10)
Fig. 10
If diagnosis indicates the switch is inoperative, take the switch apart and inspect for signs of corrosion. (Fig. 11) The cause of the inoperative switch may be water leaking into the switch from the roof ditch molding area. A corroded switch will need to be replaced.
Fig. 11
Once the new switch is installed, check for water leaking into the vehicle. Before reinstalling the left-side D-pillar interior trim, spray water over the left-rear roof ditch molding area and inspect for a water leak in the vehicle. If water enters this area, it may run down the wiring harness that leads into the 3rd-row seat switches.
Check the following areas for a possible leak.
Liftgate harness grommet – Inspect the liftgate harness grommet around the entire grommet sealing surface. (Fig. 12) Reseat the grommet if needed.
Fig. 12
Body seam – Remove the left and right gutter trim and inspect the body seam areas for any sealant voids. (Fig. 13) Clean and reseal the seams if voids are found.
Fig. 13
Trim clips – Disengage the top gutter trim from the body and inspect the trim clips for the sealing gasket. (Fig. 14) Replace the clip if the gasket is damaged.
Fig. 14
Liftgate weatherstrip – Inspect the upper liftgate weatherstrip for proper sealing. (Fig. 15) Reseat if necessary.
Fig. 15
Liftgate actuator harness grommet – Visually inspect the left-hand liftgate actuator harness grommet around the entire grommet sealing surface. (Fig. 16) Reseat if necessary.
Fig. 16
Roof ditch – If the leak is coming from the roof ditch area, remove the liftgate hinge cover assembly and fill any missing body seams. (Fig. 17)
Fig. 17
For more information, including the recommended seam sealer, refer to Bulletin #25-NA-342.
– Thanks to Mark Shearer
