Product Description
Genuine 6603 Fuel Pump (Vintage Rebuilt)
Restore the fuel delivery system of your classic Chevrolet or GMC truck to factory-correct standards with this professionally rebuilt mechanical fuel pump. Proudly Made in the USA, this genuine vintage unit is a period-correct component essential for high-quality restorations. By utilizing high-quality original castings, this rebuilt pump maintains the authentic look and rugged durability that modern mass-market replacements often fail to provide, ensuring your inline-6 receives steady, reliable fuel pressure.
This specific model, 6603, is a robust fitment for 1963-1968 Chevrolet and GMC truck applications equipped with 230, 250, and 292 cubic inch 6-cylinder engines. According to vintage manufacturer data, this unit serves as the primary replacement for original equipment part number 565 6603. It is engineered to handle the specific plumbing requirements for a wide range of models, including C/K Series pickups, Suburbans, and Forward Control (P-Series) vans, providing the precise volume and pressure these workhorse powerplants require.
Note on Stock Photos: Due to our volume of identical, interchangeable inventory, we use representative stock photos for this model. The image is for reference only and may depict a specific manufacturer (e.g., 'AC'). You will receive a pump that meets all listed specifications, which may be from the manufacturer shown or a fully equivalent alternative.
A Note on Fitment Accuracy: We manually research and cross-reference our fitment data using vintage manufacturer catalogs. While we strive for 100% accuracy, these decades-old resources—and the humans reading them—can occasionally contain errors. Additionally, these pumps may fit other vehicles and years not explicitly listed in our data. To ensure a seamless restoration, we kindly ask that you perform your own due diligence and verify that this specific part number is correct for your application prior to purchase.
Key Features:
- Part Number: 6603 (Master 6603M)
- Interchange / Replaces OEM: 565 6603
- Position: Engine Mounted
- Engine Fitment: 230, 250, 292 CID L6
- Origin: Made in USA (Vintage Stock)
- Condition: Vintage Rebuilt
Verified Vehicle Fitment:
| Make | Model / Series | Year | Engine | Notes |
| Chevrolet / GMC | Truck (C/K Series, Suburban) | 1963-1968 | 230, 250, 292 L6 | Optional / Standard H.D. Fitment |
| Chevrolet / GMC | P-Series (Forward Control / Step Van) | 1963-1965 | 230, 292 L6 | Flat Face Cowl / Dubl-Duti |
| Chevrolet / GMC | School Bus | 1963-1968 | 292 L6 | Standard Fitment |
Fits Years:
1963 1964 1965 1966 1967 1968
Unbeatable Prices & Expectations
We scour the country to find the best deals on NOS and NORS parts so we can pass the savings on to you. Our vintage inventory is acquired from old auto parts stores, warehouses, and private collections. While these parts are unused or professionally rebuilt, their packaging and surfaces may show signs of shelf wear or age due to decades of storage. Rest assured, every part is a genuine piece of automotive history, built to the standards of the era it represents.
