NOS Genuine GM Fuel Gas Cap 370364 — Group 3.028 (4-1/8\" Outer Diameter)
Up for sale is a brand-new, New Old Stock (NOS) Genuine General Motors fuel tank filler cap. This is an authentic factory original part from the General Motors Parts Division (Detroit, Michigan), complete with its original vintage box.
Product Specifications:
- GM Part Number: 370364 (Later superseded by 465271 / 465272)
- GM Group Classification: GR. 3.028 (Cap - Fuel)
- Cap Venting Type: Factory stamped \"PRESSURE-VACUUM\" venting configuration to manage fuel tank pressure safely
- Outer Diameter: Approximately 4-1/8 inches
- Country of Origin: Made in U.S.A.
Vehicle Fitment Note:
This large-diameter pressure-vacuum fuel cap is a vintage heavy-duty/commercial component used on 1970s GM medium and heavy-duty truck platforms (Chevrolet & GMC C50, C60, C70, and related commercial or bus chassis models). Please check your original parts manual, look up Group 3.028, or physically verify your filler neck diameter to guarantee an exact fit before purchasing.
Condition Notes:
True NOS item. The fuel cap is brand new and has never been mounted on a vehicle. The metal is exceptionally clean with the original factory plating looking bright. The original box is included and shows minimal, typical vintage shelf wear as pictured. The label is clean, legible, and fully intact.
