Question about 2003 Hummer H2

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03 H2 HUMMER THAT I HAD RUNNING IN MY DRIVE WAY AND IT RUN OUT OF GAS AND I PUT GAS IN IT AND STILL WOULDNT START SO I CHECKED THE FUEL RAIL AND IT DIDNT HAVE ANY PRESSURE SO I TOOK MY SOLUS SCANN TOOL AND IT SAID FUEL SECURITY SHUT OFF ..SO IS THERE A WAY TO RESETT THIS PROBLEM

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Check your owners manual. There should be a section on resetting the fuel shut off switch.

Posted on Feb 27, 2009

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2003 Hummer H2 acts like it is not getting enough gas. Will run and when press pedal backs off like not enough fuel. Have changed mass air flow sensor as directed by code reader,fuel pump, fuel filter...


try replacing the ignition coils and spark plugs, as a last resort try replacing the ecm that may also be the problem you may be able to get parts from a recycler its cheaper than the dealer

Jan 20, 2015 | 2003 Hummer H2

1 Answer

Wife came home in h2 hummer 2003 parked,30 mins.,went to make store run and hummer turns over but does not crank;.has fuel! i checked pcm b module fuse,fuel pump relay (f/pmp) . I put an OBD to check...


Hello Stacy, My name is Mike. I am thrilled that you choose me to help you with your problem. I am sorry, it took me a few hours to get back to you. I have been helping other customers. Here is where I am with this on your cranking and not starting issue. Oh, by the way great job on your part eliminating some of the other potential suspects.


First of all, I try and tackle the easiest things first,to see if we get lucky.


Pull the start/run relay out for a couple minutes, then put it back in and reset it might reset the passlock box and start right up.

Now, why did I say that? I believe your problem is with your Passlock indicator.( which has to do with your anti theft system)The way I just described is a 50/50 chance to have it work, but don't worry. I always have a plan B and C.


Here is some questions to your symptoms: Stay with me now, wait for it.


Perform the re-learning procedure


Turn ON the ignition, with the engine OFF.

Attempt to start the engine, then release the key to ON (vehicle will not start).

Observe the SECURITY light, after approximately 11 minutes the light will turn OFF.

Turn OFF the ignition, and wait 10 seconds.

Repeat steps 1 through 4 two more times for a total of 3 cycles/30 minutes ( the vehicle

is now ready to relearn the Sensor Data Code and/or passwords on the next ignition switch transition from OFF


to CRANK).


Important: The vehicle learns the relearns Sensor Data Code and/or password on the next ignition switch


transition from OFF to CRANK. You must turn the ignition OFF before attempting to start the vehicle.


Start the engine (the vehicle has now learned the Sensor Data Code and/or password).


Here is Plan C as promised, but I personally would not suggest, Even though GMC offers a bypass procedure.


Link for a Bypass Solution:

http://newrockies.com/installation-instructions/hummer/h2/2003-hummer-h2/


Plan D, would be have to check into possibility of bad ECM, but lets hope that is just a worst case scenario.


Thanks So Much,Mike. Please Keep Me Informed of progress.

Sep 28, 2011 | 2003 Hummer H2

1 Answer

I have 2003 hummer h2 it run out gas, i put gas inside but is not start?why.


TURN YOUR KEY ON AND LET YOUR FUEL PUMP CYCLE FOR 10 SECONDS you will hear it run ,being that you ran it dry it takes a bit to get the gas through the lines to the throttle body

Sep 26, 2010 | 2003 Hummer H2

1 Answer

My hummer ran out of gas and after filling it it wonts start it cranks but it doesnt start


ther is a inersua switch some were on that hummer plus check with the dealer that H2 has som kind of fuel sending unit problem if you park it on a steep hill and with low fuel it will triger it and it will crank but wont start but will have gas the delear reset my blank..... button I for gt wht but chek first or you may have burened out the fuel pump been there too.....the pump is in the gas tank I think this is your problem put car in park break on then have some one turn the key on the fuel pum shuld hum for about 3 seconds then shut off....part cost about 190.00 dont get tricked into paying 700.00 for a factory pump

Sep 09, 2010 | 2003 Hummer H2

2 Answers

My 2003 h2 died this morning while driving. All


disconnect harness to the pump and jump with test light, turn key on and the light should go on for a few seconds

Nov 28, 2009 | 2003 Hummer H2

1 Answer

Were is the gas filter for a 03 hummer h2 located


If you go to autozone.com
register,, enter your car info,,
and you will have a ton of onfo about your car.. Like location on parts on the car,, parts,, part #'s,, how to,, diagrams - etc....

A very good resourse and makes thing allot easier now,, and for future projects..

Cheers !

Sep 24, 2009 | 2003 Hummer H2

1 Answer

Where is the fuel filter on 1 2003 h2?


it should be in the left frame rail near the gas tank. if not there check on fire wall in engine compartment. hope this helps

Aug 01, 2009 | 2003 Hummer H2

1 Answer

Low engine endurance


CHECK AIRFILTER,CLEAN FUEL INJETOR,SPARK PLUGS WIRES AND COILS .YOUR BEST SHOT TAKE YOUR TRUCK FOR A DIACNOSIS .

Jul 14, 2009 | 2003 Hummer H2

1 Answer

Gas gauge and speedometer not working


for what i had experienced is to change the fuel sender unit and speedometer gauge and recalibrate the IPC to the latest calibration.

May 30, 2009 | 2003 Hummer H2

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