Chevrolet 13510661 Fuel Pump

To verify the operation of the fuel pump, try to listen for a brief sound it makes when you turn the ignition on and pressurizes the fuel system before starting your engine. Should you not hear any pump, then open up your fuel filler cap, push down on the spring loaded hatch within the neck of your gas tank, and have someone else turn on the ignition while you listen for about two seconds as to whether or not it is functioning. If this pump does not come on, you should inspect whether both relay and fuse are in a good condition located in relay box of engine compartment along with wires going back to it. In that case, chances are that the pump is broken. However, if it functions continuously when turning ON key expect that Powertrain Control Module (PCM) may be damaged so take it to qualified mechanic for diagnosis. To do a fuel pressure test find a Schrader valve test port on your fuel rail (for 2016 and newer models; high-side fuel pressure can only be checked with scan tool). Release fuel pressure and close bleeder valve on gauge at fuel outlet. On 2016 and later models release system pressure disconnect low-pressure feed line from high-pressure pump tee-in gauge assembly using appropriate adapters Turn key to ON position note gauge reading as pressure stabilizes compare reading against specification If pressure differs from specified value look for restriction in fuelsection replace module where necessary Also ensure pressure drops below 87 psi after key off and doesn't drop by more than 5 psi per minute; otherwise there might be leaky injector or bad module Finally start car check pressures swap out module if needed ensuring no lines are spilling out afterwards.