When it comes to maintaining a Chevrolet Colorado ZR2 Bison, one of the most critical components to keep an eye on is the fuel pump. This hardworking part ensures your engine gets the right amount of fuel at the correct pressure, which is especially important for off-road enthusiasts who push their vehicles to the limit. But with so many options out there, how do you know which fuel pump is the right fit for your rig? Let’s break it down.
First, it’s worth understanding why the ZR2 Bison isn’t your average midsize truck. Built for extreme off-roading, it features reinforced skid plates, Multimatic DSSV dampers, and a factory-installed winch mount. This means the fuel system needs to handle rough terrain, steep angles, and sudden shifts in demand. A weak or mismatched fuel pump could lead to poor performance, stalling, or even engine damage – none of which you want when you’re miles from pavement.
For the Chevrolet Colorado ZR2 Bison (2017–2023 models), the most reliable fuel pump replacements are those designed specifically for GM’s 3.6L V6 LGZ engine or the 2.8L Duramax turbodiesel, depending on your trim. OEM (Original Equipment Manufacturer) parts like the GM Genuine MU170 or MU171 fuel pump assemblies are popular choices because they’re engineered to match the factory specifications. These models include the pump, fuel level sensor, and housing, ensuring seamless integration with your truck’s existing system.
That said, aftermarket options can also work well if you’re looking for a balance between quality and affordability. Brands like ACDelco Professional and Delphi have earned trust for their durable designs and consistent performance. For example, the ACDelco 13598729 fuel module or the Delphi FG1682 fuel pump assembly are known to deliver OEM-level reliability without breaking the bank. Just make sure whichever pump you choose meets the required pressure rating (typically around 58–65 psi for the gasoline engine and higher for diesel variants) and fits the Bison’s unique fuel tank configuration.
Now, if you’re planning a DIY replacement, here’s a pro tip: the fuel pump on the Colorado ZR2 Bison is located inside the fuel tank, which means you’ll need to drop the tank to access it. This can be tricky without a lift or proper tools, so many owners opt for professional installation. Either way, always disconnect the battery and relieve fuel system pressure before starting – safety first! Also, inspect the fuel filter and lines while you’re in there, since debris or wear in these areas can strain the new pump.
But what if you’re upgrading for better performance? Some off-roaders swear by high-flow fuel pumps like those from KEMSO Racing, which are built to handle modified engines or added accessories like turbochargers. Their fuel pump kits often include upgraded wiring and reinforced components to withstand vibration and heat, making them a solid pick for adventure-ready builds. Just double-check compatibility with your model year, as even small design changes between generations can affect fitment.
Maintenance is another key factor in extending your fuel pump’s lifespan. Contaminated fuel is a common killer of pumps, so avoid filling up at sketchy gas stations, and consider adding a fuel stabilizer if the truck sits unused for long periods. Listen for unusual whining noises from the tank area, which could signal a failing pump. If your engine struggles to start, hesitates under acceleration, or randomly loses power, it’s time to get the fuel system checked.
In the end, choosing the right fuel pump for your Chevrolet Colorado ZR2 Bison comes down to matching specs, prioritizing quality, and considering how you use the truck. Stick with trusted brands, verify part numbers, and don’t hesitate to consult a mechanic if you’re unsure. After all, a reliable fuel pump isn’t just about keeping your engine running – it’s about ensuring your Bison stays ready for whatever trail, mountain, or mud pit you throw at it next.