Question about 1999 GMC Sonoma

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REPLACED A NEW FUEL PUMP BUT THE PUMP IS NOT BUZZING TRUCK NOT STARTING WHAT IS WRONG?

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Check your connections again for tightness and make sure there is no corrosion or terminals coming apart .

Posted on Jun 29, 2015

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Check to make sure that you reset the fuel pump cutoff switch. Without that switch in the proper position, the fuel pump will not operate.

Posted on May 03, 2010

  • Amanda Hulse Jun 29, 2015

    How do you reset the fuel pump shut off switch, 03 GMC SANOMA?

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1 Answer

My 2001 blazer wont start we put in a new fuel filter, all the lights on dash works head lights work , need help only truck


is fuel getting top the engine.. is pump coming on just before starting..should hear a 2-3 second buzzing..if not check starting auto shutoff relay..

Dec 22, 2013 | 2001 Chevrolet Blazer

1 Answer

Car repairs I just replaced my fuel pump in my truck but dont seem to b getting fuel to throttle body still wont start i have checked my relay and can here fuel pump come on


If youare looking for fuel at the throttle body, you will not find any unless there is something TERRIBLY WRONG with your truck. Depending on which engine you have (there are 3 possible engines for the 1996 model year) your truck is equipped with Multiport Fuel Injection (MFI) or Sequential Multiport Fuel Injection (SMFI)
You need to test the fuel pressure by connecting a fuel pressure gauge to the service port on the fuel rail. If the pump is running, there is no need to mess with the relay because it is obviously working. If the pressure is OK, then there is no problem with your fuel delivery system. The next thing to check is the fuel injection system. Also, have you checked to see if you have spark at the spark plugs? It could be that your truck is not starting because of ignition system problems.

Please also review the following article:
What Else Could Be Wrong?

Sep 17, 2011 | 1996 GMC Sonoma

1 Answer

Fuel line losses pressure and the truck will not stay on, have replaced the fuel filter and fuel pump. after changing the fuel pump notice that the fuel pump has no power to it, checked the fuse and it is...


What year and model is the truck?.. You say that if you use starting fluid and keep the gas pedal on open throttle the truck stays on?.. that means that at certain point you do get gas in the fuel system. Is it correct?.. otherwise let me know so I can give you more instructions.

Mar 03, 2011 | Chevrolet 1500 Cars & Trucks

1 Answer

When I turn the key in the ignition I don't hear anything and my car won't start. I tested the started and it is fine. I replaced the ignition switch. Could it be my alternator or my neutral safety switch...


no. the noise you're not hearing is the fuel pump. When u turn ur key on you should hear a buzzing like sound from the rear of the vehicle. If not, and ur car don' start, probably fuel pump. Just to verify the faulty fuel pump, have an assistant open the fuel tank cover and remove the gas cap itself. With you inside turn just the key on, and have your assistant listen for the "buzzing" or "hummin" sound. if nothing there, then faulty fuel pump. If noise is present, then perhaps you have a different problem like nothing is reaching the engine, fuel wise. Like a plugged fuel filter. when replacing the fuel pump, ALWAYS do the new strainer as installing the old one could cause a whole new set of problems and eventually wipe out the new one as well *RULE OF THUMB, WITH NEW FUEL PUMP, REPLACE FUEL FITLER.* this will be easier on the pump output to the engine. good luck.!

Aug 24, 2010 | 1994 Jeep Grand Cherokee

2 Answers

My 1997 chevy tahoe will not start without starting fluid. I hear the fuel pump running and have changed the fuel pressure regulator already and the fuel filter. The pump is only a year old. Have checked...


IVE HAD PLENTY OF THESE GO OUT EVEN A MONTH LATER. AS FAR AS THE STARTING FLUID JUST TRY AND CYCLE KEY BUT KEEP IT FROM TURNING STATER OVER. TURN ON AND OFF ABOUT 3 TO 5 TIMES IT SHOULD BUILD ENOUGH PRESSURE TO START. TO START MINIMUN PRESS IS 55PSI.

Oct 30, 2009 | 1997 Chevrolet Tahoe

1 Answer

Fuel pump sounds like its stuck on hear that constant buzzing?


That is the classic Gm fuel pump. You'll have real problems when it stops making noise, that's when it won't pump anymore. Changing the pump will reduce the noise. You never know when that old pump will die.

Mar 27, 2009 | 1996 Chevrolet K1500

1 Answer

Won't start


Well lxmccarthy, since you put a new fuel pump in, check a hose after the pump and see if any gas is being delivered. You can also try some starting fluid in the carb to get something going. There probably is just some air in the fuel line.

Jan 26, 2009 | 1990 Chevrolet C2500

1 Answer

1989 mercury topaz


Listen carefuly fir buzzing when you turn the key on. The fuel pump should run for 2 seconds. Then it should rin during crabking. if the car starts with starting fluid, it tells me the fuel pump is not running. Cause - bad pump, bad fuel pump relay (left side of Instrument panel), or tripped inertia switch in trunk.

Jul 14, 2008 | 1989 Mercury Topaz

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