The Precision Wiper Cowl Seals CS 1111 88 is a durable cowl-to-windshield seal engineered to prevent water intrusion, reduce wind noise, and protect the firewall and electrical components. Made from resilient weather-resistant rubber, this seal restores proper drainage and fitment for worn or missing original seals, improving cabin dryness and long-term reliability. Designed as a direct replacement to return the wiper cowl area to factory-like performance, it delivers easy installation and lasting resistance to UV, ozone, and temperature cycling—ideal for routine maintenance and restoration projects.
Features:
- Direct replacement cowl seal to restore proper drainage and firewall protection.
- Made from durable, weather-resistant EPDM rubber for UV, ozone, and temperature resistance.
- Prevents water intrusion into the engine bay and cabin, protecting wiring and components.
- Reduces wind noise and vibration by sealing the wiper cowl interface.
- Easy to install with standard hand tools; trims to fit if minor adjustments are required.
- Ideal for restoration and routine maintenance to return the cowl area to factory performance.
Installation / Application:
- Difficulty: 2/5
- Estimated time: 30-60 minutes
Instructions:
- Park vehicle on level ground, set parking brake, and turn off ignition. Lift wiper arms and mark their position on the windshield with tape or a marker to preserve alignment.
- Remove wiper arm nuts and carefully lift off the wiper arms. Place them aside in the marked positions.
- Remove the cowl cover fasteners (clips/screws) and carefully lift the cowl panel to expose the old seal. Use a trim tool to avoid damaging the panel.
- Pull out the old seal and clean the mounting channel thoroughly with a rag and rubbing alcohol to remove dirt, adhesive, and residue. Allow to dry.
- Test-fit the new CS 1111 88 seal in the channel. Trim the ends lightly if necessary for a precise fit.
- If desired or required, apply a thin bead of weatherstrip adhesive along the mounting channel. Press the new seal firmly into place, ensuring it seats evenly along the entire length.
- Reinstall the cowl panel and secure all clips and fasteners. Reinstall wiper arms in their original marked positions and tighten nuts to manufacturer torque specs.
- Lower the wiper arms and test wiper operation. Check for proper seating and run a water test (hose) to confirm there are no leaks and drainage is functioning.
About Precision Replacement Parts
Since 1986 Precision Replacement Parts has been a trusted name in the Automotive Glass Industry.
Our knowledge and experience in manufacturing millions of extruded and molded EPDM Rubber, PVC and HDPE based plastics, and various stamped and extruded metal products for the classic and late model industries has allowed Precision to expand our services into multiple product markets.
Along with our own USA based production facility, Precision also partners with 25 different manufactures worldwide with a reputation as a global leader supplying OEM and replacement products to a number of different industries. Our partnerships along with our own in-house manufacturing and fabrication capability gives Precision a unique position in helping to meet the expanding needs of customers everywhere, providing them with a sustained competitive advantage.
Vehicle Fitment:
The Vehicle Fitment Guide is to be used as a general reference. The data has been provided by our suppliers and manufacturers and may contain errors or incorrect data. Always refer to a professional to verify correct fitment for your vehicle.
| Make |
Model |
Years |
| Cadillac |
Escalade |
1999 - 2000 |
| Chevrolet |
Blazer |
1992 - 1994 |
| Chevrolet |
C1500 Suburban |
1992 - 1999 |
| Chevrolet |
C1500 |
1988 - 1999 |
| Chevrolet |
C2500 Suburban |
1992 - 1999 |
| Chevrolet |
C2500 |
1988 - 2000 |
| Chevrolet |
C3500HD |
1991 - 2002 |
| Chevrolet |
C3500 |
1988 - 2000 |
| Chevrolet |
K1500 Suburban |
1992 - 1999 |
| Chevrolet |
K1500 |
1988 - 1995 |
| Chevrolet |
K2500 Suburban |
1992 - 1999 |
| Chevrolet |
K2500 |
1988 - 1995 |
| Chevrolet |
K3500 |
1988 - 1995 |
| Chevrolet |
Tahoe |
1995 - 1999 |
| GMC |
C1500 Suburban |
1992 - 1999 |
| GMC |
C1500 |
1988 - 1995 |
| GMC |
C2500 Suburban |
1992 - 1999 |
| GMC |
C2500 |
1988 - 1995 |
| GMC |
C3500 |
1988 - 1995 |
| GMC |
K1500 Suburban |
1992 - 1999 |
| GMC |
K1500 |
1988 - 1995 |
| GMC |
K2500 Suburban |
1992 - 1999 |
| GMC |
K2500 |
1988 - 1995 |
| GMC |
K3500 |
1988 - 1995 |
| GMC |
Yukon |
1995 - 1999 |
