Diagnose and replace a failed fuel pump driver module on a GM Silverado step by step.
Based on: Chevy Silverado: Years Of Problems... Nobody Thought To LOOK? by South Main Auto LLC
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Have you ever had a check engine light sit on your dash for years while shop after shop shrugged and sent you home with a bill and no answer? That is exactly the situation the owner of this 2016 Chevy Silverado found himself in — and the real fix turned out to be something almost nobody thought to look at.
Here is the hard truth about fuel pump problems on GM trucks: most people assume the pump itself is dead, throw a few hundred dollars at it, and still end up with the same codes and the same glowing light. Meanwhile the actual culprit — the fuel pump driver module mounted underneath the truck, exposed to every mile of road spray, salt, and moisture — is quietly rotting away where nobody bothers to check. The result is years of frustration, failed inspections, and a truck that sounds like it is screaming every time you turn the key.
Now imagine knowing exactly what codes to look for, understanding why the low-pressure fuel system loses control when communication drops, and having a clear visual inspection checklist that tells you precisely what a failed module looks like before you ever touch a scan tool. Imagine confirming a plug-and-play replacement in minutes, skipping expensive programming, and watching the check engine light go dark after just a few key cycles — all without guessing.
Eric at South Main Auto LLC has spent years diagnosing exactly these kinds of GM gremlins on real customer vehicles, walking through every step live and on camera with no shortcuts. His approach — pull codes first, check live fuel pressure data, read the wiring diagram, do a visual inspection, verify the repair with a scan tool — is the same process professional technicians use every day. He has seen this failure pattern on multiple GM trucks and knows exactly where to look and what to expect.
This checklist turns that entire diagnostic process into a clear, step-by-step action guide you can follow in your own driveway or shop. Every step is pulled directly from the repair, including the specific trouble codes to look for, the connector pins to check, the fuel pressure values that reveal a loss of control, and the scan tool steps to confirm the repair is complete without needing a full drive cycle. Pick up this PDF checklist and get your Silverado diagnosed and back on the road the right way.
Every checklist item comes with actionable notes to guide you — things like "Don't forget to do this before you start," "Avoid this common mistake," or "Set a reminder for 30 days out." Nothing vague, just clear next steps.
+ 18 more action items inside...
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