Factory-original GM roof rail weatherstrip (left/driver side), part number 20737659, still sealed in its original GM packaging. This is a genuine OEM piece — not reproduction — ensuring perfect factory fit and finish along the roofline and door glass area.
The rubber remains soft and pliable with no signs of dry rot, though there is a small area of minor damage (see photos) that does not affect installation or overall sealing performance. Ideal for restoration-grade builds or collectors looking to maintain originality with genuine GM materials.
🔹 Condition: Diamond OEM – New in original GM packaging (100% retail value with minor cosmetic blemish) 🔹 Compatibility: 1986–1987 Buick Grand National, Turbo T, T-Type, Regal Limited 🔹 GM Part Number: 20737659 (Left / Driver Side Roof Rail Weatherstrip) 🔹 Includes: One (1) OEM GM left roof rail seal in original bag 🔹 Notes: Small area of damage noted; genuine GM part, no longer in production, perfect OEM fit
