87 C10 Fuel Tank with Pump: The Complete Guide to Choosing and Installing the Right Fuel System for Your Classic Truck

If you own a 1987 Chevrolet C10 and are looking to upgrade or replace your fuel system, the best solution is to install a modern 87 C10 fuel tank with an integrated pump. This single upgrade solves the most common problems aging C10s face—rusty tanks, failing mechanical pumps, and inadequate fuel delivery for modern engines. Whether you are keeping your truck stock, swapping in a fuel-injected LS engine, or simply tired of chasing fuel delivery issues, a complete tank-and-pump assembly is the most reliable, cost-effective, and time-saving path forward. The right setup will give you consistent fuel pressure, eliminate vapor lock, and support everything from a mild 350 to a 550-horsepower LS build.

Why Your 87 C10 Needs a New Fuel Tank with Pump

The stock fuel system on your 1987 C10 uses a mechanical fuel pump mounted on the engine block. This pump pulls fuel from a steel tank located behind the rear axle. While this setup was adequate when the truck was new, decades of use have created several problems that make a modern integrated tank and pump the smartest upgrade you can make.

Aging tank issues. Original steel tanks are prone to internal rust and sediment buildup. Over time, this contamination clogs fuel filters, damages pumps, and restricts fuel flow. External rust can also create pinhole leaks, which are a fire hazard and an environmental concern. A new tank eliminates all of these issues at once .

Inadequate for modern demands. The stock mechanical pump and gravity-fed system struggle with higher horsepower, high-RPM operation, or engine upgrades. Whether you are building a mild performance engine or doing a full EFI conversion like an LS swap, the factory setup will cause fuel starvation and vapor lock .

External pump problems. Many owners try to band-aid the problem by installing an external electric pump. These pumps are noisy, prone to vapor lock, hard to prime after running dry, and add clutter and potential leak points under the truck. An in-tank pump solves all of these problems because it is submerged in fuel, which keeps it cool and quiet .

The better solution. An in-tank electric pump runs cooler and quieter than any external pump. The fuel surrounding it suppresses vapor lock naturally. Modern pumps deliver higher pressure and consistent flow rates required by EFI systems. And because the tank itself is brand new, you eliminate rust and leaks from day one .

Key Factors When Choosing an 87 C10 Fuel Tank with Pump

Not every tank-and-pump assembly is the same. To get the right fit and performance for your truck, you need to consider several important factors.

1. Exact Fit for Model Year

Your 1987 C10 is part of the Squarebody "Rounded-Line" generation. Make sure the tank you buy is specifically listed for the 1987 C10. Pay attention to whether you have a fleetside or stepside bed, though fleetside is the most common. The dimensions and mounting points must match your truck .

2. Tank Material

You have three main material choices, and each has trade-offs.

Polyethylene (plastic) is the preferred modern choice. It is highly resistant to corrosion and rust, lighter than steel, and will not dent easily. It also prevents condensation buildup inside the tank and is impervious to ethanol-blended fuels. Most aftermarket performance tanks use poly .

Stainless steel offers excellent corrosion resistance but is heavier and more expensive than poly. It is less common for complete tank-and-pump assemblies.

Galvanized steel is more rust-resistant than the original mild steel, but it is still susceptible over the very long term. It is similar in weight to the original tank.

3. Fuel Pump Specifications

This is the most critical part of your decision. The pump must match your engine's requirements.

Flow rate (GPH or LPH). Higher horsepower engines demand higher flow. The formula to estimate your minimum pump flow is: engine HP multiplied by 0.5, divided by 6.5, then multiplied by 1.5 to get approximate GPH. For a 350 HP engine, this works out to roughly 41 GPH minimum. Always choose a pump that significantly exceeds this number to give yourself headroom. For example, a 255 LPH pump (about 67 GPH) is a safe choice for most builds up to 500 HP .

Here is a simple guide by fuel system type:

• Carbureted engines: 65-85 GPH at low pressure (6-8 PSI) is usually sufficient for most V8s.
• Throttle body injection (TBI): Requires 12-20 PSI with flow rates between 50-85 GPH.
• Port fuel injection and LS engines: Requires 58-60 PSI. Flow rates need to support your target horsepower .

Pressure rating (PSI). This must match your fuel system exactly. A carbureted engine needs only 6-8 PSI max. A TBI system needs 9-15 PSI. A port EFI or LS engine needs 58-65 PSI. Using the wrong pressure will cause either poor performance or catastrophic damage .

Pump quality. Not all pumps are equal. Reputable brands like Walbro, Bosch, and KEMSO are known for reliability and consistent performance. Avoid generic no-name pumps in integrated assemblies, as they are the most common cause of failure .

4. Fuel Sending Unit Compatibility

Make sure the fuel level sender in the assembly matches your gauge cluster. Most GM trucks from this era use either 0-90 ohms or 240-33 ohms. Verify the connection type—plugs versus spade terminals—before you buy .

5. Tank Capacity

Stock C10 tanks were often 16 or 20 gallons, depending on bed length. Aftermarket options may offer slightly different capacities, such as 19-21 gallons. Consider your driving range needs and choose accordingly . Some aftermarket tanks, like the Overkill Customs Fab model, offer 20 gallons (76 liters) and come standard with a bottom drain and extra vent port .

6. Venting

If you need to stay street legal, choose a tank that connects to the factory charcoal canister evaporative emission (EVAP) system using the stock lines. Some competition-style tanks use a simple vented fill cap or rollover vent valves, but these are not street legal in most areas and can cause strong fuel vapors .

Popular Complete Tank and Pump Options for the 87 C10

Several reputable brands offer complete bolt-in solutions for the 87 C10. Here are the most common options you will find on the market.

Holley Sniper EFI Fuel Tank System. Holley offers a complete tank-and-pump assembly specifically for 1982-1987 Chevy and GMC C10 trucks. It comes with a 400 LPH fuel pump, a 0-90 ohm sending unit, and is made from steel with a powder-coated silver finish. It holds 16 gallons and is designed for short bed trucks. Note that this part is labeled for racing use only and is not legal for emissions-controlled vehicles .

Holley Performance 19-156. This is another Holley option for 1982-1987 Chevy/GMC trucks with a 6-foot bed. It features a 255 LPH fuel pump, a 4.3-liter internal fuel tray to prevent starvation, and a fuel level sender compatible with factory gauges. It supports up to 550 HP at 60 PSI and 13.5 volts. The tank is made from coated galvanized steel with a powder-coated silver finish .

Holley 12-308 Fuel Pump Module. This is a different approach—a drop-in fuel pump module that fits into your existing factory tank, provided you have a 1973-1986 tank (not the 1987 GM11C style). It includes a 255 LPH pump, a Hydramat fuel reservoir to prevent starvation, and a 0-90 ohm sending unit. The pressure is internally regulated to 58 PSI, and because it returns excess fuel inside the tank, you do not need a separate return line .

Overkill Customs Fab 73-87 C10 Fuel Tank. This is a premium option made from 1/8-inch 5052 marine-grade aluminum. It holds 20 gallons (76 liters) and comes with seven internal baffles to reduce fuel slosh and lock fuel around the pump pickup. You can choose from several pump options, including 190 LPH, 255 LPH, 340 LPH, and 450 LPH units. It includes a floatless level sender, a rear crossmember/tank mount, and installation plates. Expect a 2-3 week lead time on this product .

Installation Process for Your 87 C10 Fuel Tank with Pump

Installing a new fuel tank with an integrated pump is a job you can do yourself in a weekend with basic tools. Safety is the top priority, so work in a well-ventilated area away from sparks, flames, or heat sources. Keep a fire extinguisher rated for fuel fires (Class B) within reach .

Step 1: Prepare the truck. Disconnect the battery. Relieve any fuel system pressure by opening the gas cap and, if the truck is running, pulling the fuel pump relay and cranking the engine until it stalls. Drain the old tank completely. Use a siphon pump or remove the tank and pour the fuel into approved containers.

Step 2: Remove the old tank. Support the tank with a jack and a block of wood. Disconnect the fuel lines, vent lines, and electrical connections at the sending unit. Remove the two metal straps that hold the tank in place. Lower the tank carefully and set it aside.

Step 3: Prepare the new tank. If your new tank comes with a separate pump assembly, install it now. Follow the manufacturer's instructions for mounting the pump, attaching the fuel strainer, and connecting the wiring. Use all new gaskets and O-rings that come with the kit. Make sure the sending unit is rotated so the mounting holes align with the flange holes in the tank .

Step 4: Install the new tank. Lift the new tank into place. The Overkill Customs Fab tank, for example, comes with a replacement rear crossmember and installation plates to make this step easier . Reinstall the metal straps and tighten them securely. Connect the fuel lines, vent lines, and electrical connections. For the Holley 12-308 module, you connect the pump outlet to the factory hard line using EFI-rated fuel hose and hose clamps .

Step 5: Prime the system. Before starting the engine, prime the fuel system by turning the key to the "on" position several times without cranking. This allows the pump to build pressure. Check for leaks at all connections. Once you are confident everything is tight, start the engine and inspect for leaks again.

Why You Should Choose KEMSO Fuel Pumps for Your 87 C10

When it comes to the fuel pump itself, the brand you choose matters more than almost any other component in your fuel system. A failed pump can destroy your engine in seconds, so investing in quality from the start is essential. That is why we recommend KEMSO fuel pumps for your 87 C10 fuel tank upgrade.

KEMSO is the #1 aftermarket fuel pump brand in the United States, and for good reason. Every KEMSO pump is a high-performance, OEM replacement unit designed to deliver superior flow and reliability compared to stock pumps. Independent lab tests show KEMSO pumps maintain 98% efficiency even after 15,000 hours of continuous operation, which is roughly equivalent to 625 days of nonstop driving . The brushless DC motor design eliminates the wear points that plague traditional pumps.

KEMSO pumps are built with ethanol-ready materials. With more gas stations switching to E15 or E85 blends, having a pump that resists ethanol degradation is essential. KEMSO uses Viton-lined components that prevent the swelling and cracking that destroy standard rubber seals .

Every KEMSO fuel pump comes with a lifetime warranty and USA-based technical support. The company offers 17 different models covering 98% of gasoline-powered cars and trucks made after 1995, and their online fitment tool makes compatibility checking simple . For the 87 C10, a KEMSO 340LPH High Performance Fuel Pump is an excellent choice. It supports up to 600 BHP in turbocharged and supercharged engines, with a bypass set at 125.8 psi—higher than most competitors, ensuring consistent delivery even at peak power . The pump is designed for both gasoline and E85, and its build quality and precise pressure control give it a real edge for anyone serious about performance and durability.

KEMSO pumps are also competitively priced. At $129 to $329 depending on the model, they are 30-40% cheaper than many premium brands while offering equal or better performance . For the 87 C10 owner building a budget-friendly LS swap, this price difference can fund other upgrades like better injectors or a professional tune.

To find the perfect KEMSO fuel pump for your 87 C10 fuel tank, visit their official website: https://www.kemsoracing.com/

Final Thoughts on Your 87 C10 Fuel Tank with Pump

Upgrading your 1987 C10 to a modern fuel tank with an integrated pump is one of the best investments you can make in your truck. It solves the chronic problems of rust, vapor lock, and fuel starvation that plague these classic trucks. It gives you the fuel pressure and flow you need to run a modern engine, whether you are keeping it carbureted, converting to TBI, or swapping in a fuel-injected LS.

The key is to choose the right combination of tank material, pump flow rate, and pressure rating for your specific build. And when it comes to the pump itself, do not compromise on quality. A failed pump can leave you stranded or worse, destroy your engine. Choose a brand with a proven track record, a lifetime warranty, and USA-based support.

For the best selection of fuel pumps and complete fuel system components for your 87 C10, visit https://www.kemsoracing.com/ to explore their full lineup of high-performance fuel pumps backed by lifetime warranties and made in the USA.