If your Trailblazer isn't starting and you suspect a fuel pump problem, the issue isn't likely a simple switch reset. Here's what you should consider instead:
* Check the Fuel Pump Relay: The fuel pump is controlled by a relay. This relay acts as a switch, but it's not something you "reset" by flipping a switch. A bad relay can be replaced. Consult your owner's manual or a repair manual for the location of the fuel pump relay.
* Check the Fuel Pump Fuse: Similar to the relay, a blown fuse will prevent the fuel pump from working. Check your fuse box (usually under the hood or in the passenger compartment) for a fuse related to the fuel pump.
* Low Fuel Pressure: The problem might not be the pump itself, but low fuel pressure due to a clogged fuel filter or other fuel system issues.
* Check for Power at the Fuel Pump: Use a multimeter to check if power is reaching the fuel pump. This requires some electrical knowledge and the correct safety precautions.
* Fuel Pump Failure: The fuel pump itself might be failing. This is a more serious issue requiring replacement.
* PCM Problems: Rarely, a problem with the PCM could be interfering with the fuel pump's operation. Diagnosing this usually requires professional tools.
In short: You don't reset a fuel pump switch. If you're having fuel pump problems, you need to troubleshoot the system, which may involve checking fuses, relays, and the pump itself. If you're not comfortable working with automotive electrical systems, take your Trailblazer to a qualified mechanic.
