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Makes 🢒 Cadillac 🢒 2003 🢒 CTS 🢒 Bulletins 🢒 Wet Carpet on Front Passenger Side of Vehicle Occurs with Outside Freeze-Thaw Temperature Cycles (Modify Plenum Drain Valve)

Wet Carpet on Front Passenger Side of Vehicle Occurs with Outside Freeze-Thaw Temperature Cycles (Modify Plenum Drain Valve)

Subject:Wet Carpet On Front Passenger Side of Vehicle Occurs With Outside Freeze-Thaw Temperature Cycles (Modify Plenum Drain Valve)

Models:2003 Cadillac CTS
Built Prior To VIN Breakpoint 30103532


Condition

Some customers living in cold climate areas may comment on the front passenger floor carpet being wet or water leaking from the bottom of the HVAC module. This condition is most likely if one or more of the following events occur:

    • A parked, snow-covered vehicle experiences an outside thaw-freeze-thaw temperature cycle.
    • After having driven through a car wash, heavy rain or snow, a vehicle is parked and experiences an outside freeze-thaw temperature cycle.

Cause
Object Number: 859732 Size: SH

This condition may be due to the plenum drain valve freezing shut. This allows water to back up and enter into the passenger compartment through the passenger compartment air filter and the HVAC module assembly.

Correction
  1. Modify the plenum drain valve. Refer to the procedure in this bulletin.
  2. Check the passenger compartment air filter and carpet to ensure they are clean, dry and not damaged. Clean or replace as necessary.

Procedure
  1. Raise and suitably support the vehicle. Refer to Vehicle Lifting and Jacking in the General Information sub-section of the Service Manual.
  2. Remove the plenum drain valve. The drain valve is located behind the front passenger wheelhouse panel, in front of the dash panel, underneath the battery.

    3. Object Number: 859733 Size: MF
    (1)Modified Plenum Drain Valve
    (2)(a) 34 mm (1 11/32 in/1.32 in)
    (3)(b) 14 mm (9/16 in/0.56 in)
    (4)(c) 10 mm (25/64 in/0.39 in)
  3. Modify the plenum drain valve.
    4. 3.1. Mark the dimensions shown above on each side of the drain valve.
    3.2. Cut each side of the drain valve along the marked dimension lines.
  4. Install the plenum drain valve.
  5. Lower the vehicle.

Warranty Information

For vehicles repaired under warranty, use:

Labor Operation

Description

Labor Time

D3010

Hose, Drain-Repair

0.2 hr

Add:

Air Filter and/or Carpet-Clean/Dry/Replace

ST