Product Description
Genuine 4263 Fuel Pump (Vintage Rebuilt)
Restore the fuel delivery system of your classic GMC with this genuine 4263 mechanical fuel pump. This is a vintage rebuilt part, manufactured in the USA. It has been professionally remanufactured using a high-quality original core to ensure period-correct appearance and reliable performance.
This part is designed for the engine-mounted position on specific 1955-1956 GMC truck models equipped with V8 engines. This unit was professionally reconditioned between the late 1980s and early 1990s, offering dependable operation for your vintage powertrain.
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: 4263 (Master 4263M)
- Interchange / Replaces OEM: M3018S, 1539284
- Position: Engine Mounted
- Engine Fitment: 288 CID & 324 CID V8
- Origin: Made in USA (Vintage Stock)
- Condition: Vintage Rebuilt
Verified Vehicle Fitment:
| Make | Model | Year | Engine | Notes |
| GMC | Truck (Light & Medium Duty) | 1955-1956 | 324 V8 | Standard Equipment |
| GMC | Truck (Heavy Duty) | 1955 | 324 V8 | Models 370, 500, 600 |
| GMC | Truck (Series 100-370) | 1955 | 288 V8 | Verify Mounting |
Fits Years:
1955 1956
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.
