The fuel pump circuit usually involves:
* A primary fuse: This protects the main power feed to the fuel pump circuit. Its location varies depending on the year of your Suburban (check your owner's manual or online forums for your specific year). It might be in the underhood fuse box or an interior fuse box.
* An inertia switch: This is a safety device that cuts power to the fuel pump in the event of a collision. It often requires manual resetting after a suspected impact. It's usually located under the dashboard or in the passenger compartment. A tripped inertia switch will prevent the fuel pump from working.
* A fuel pump relay: This acts as a switch, controlled by the PCM (Powertrain Control Module), to turn the fuel pump on and off. A faulty relay can prevent the pump from functioning.
To find the relevant fuses and relay:
1. Consult your owner's manual: This is the best place to start. It will have a diagram of the fuse box(es) and identify each fuse's function.
2. Use an online resource: Websites like RepairPal, or forums specific to your Chevy Suburban year and model, often have detailed information on fuse locations and diagrams.
3. Check your vehicle's fuse box labels: Carefully examine the labels in your fuse boxes (under the hood and inside the vehicle) to identify fuses related to the fuel pump, fuel injection, or the engine control system.
Important Note: Before working on your vehicle's electrical system, always disconnect the negative battery terminal to prevent short circuits. If you're not comfortable working with car electrical systems, it's best to consult a qualified mechanic.
