Tempered door glass engineered as a direct replacement for First Series 4377 S GTN applications, available for either left- or right-hand doors. The green-tinted safety glass reduces glare and improves visual comfort while providing the strength and shatter-resistant properties of tempered construction. Finished edges and accurate dimensions allow smooth fitment into existing channels and window regulators, making it ideal for restoration, repair, or upgrade projects. Durable, reliable, and easy to handle, this glass helps restore original appearance and function while meeting safety expectations for tempered automotive glazing.
Features:
- Fits First Series 4377 S GTN applications — left or right hand; confirm specific vehicle fitment before purchase.
- Tempered safety glass for controlled breakage and improved occupant protection.
- Green tint reduces glare and UV exposure while improving cabin comfort.
- Precision-cut edges for smooth operation in factory window channels and regulators.
- Direct-replacement design suited for restorations and maintenance of original equipment appearance.
- Durable, corrosion-resistant surface that resists scratches and weathering.
- Easy to handle and install with standard door glass removal and installation procedures.
Installation / Application:
- Difficulty: 3/5
- Estimated time: 30-60 minutes per door (experienced installer)
Instructions:
- Park vehicle on a level surface, disconnect the battery (if required), and lower the window (if glass still intact and operable) to a safe position.
- Remove the interior door panel and any trim necessary to access the window regulator and channel (keep fasteners organized).
- Peel back the water barrier carefully to expose the interior of the door; keep it clean and reusable if possible.
- If replacing existing glass, detach the glass from the regulator by removing mounting bolts or clips while supporting the glass with a suction cup or helper.
- Carefully lift the old glass out of the door through the upper opening. Wear gloves and handle tempered glass with care.
- Inspect and clean the window channels and regulator mounting points; remove debris and lightly lubricate channels with silicone spray or appropriate lubricant.
- Position the replacement glass into the door opening at the same angle the original was removed; guide the lower edge into the regulator bracket and the sides into the door channels.
- Align the glass with the regulator mounting holes and secure using the original hardware or recommended fasteners. Do not overtighten.
- Manually cycle the window (or reconnect and test the regulator) to verify smooth operation and proper alignment; make minor adjustments to the channel position if needed.
- Reinstall the water barrier, interior trim, and door panel. Confirm fit, seal, and operation. Clean glass and check for any binding or unusual noise during operation.
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 |
| Chevrolet |
Truck |
1951 - 1955 |
| GMC |
Truck |
1947 - 1955 |
