Question about 2003 Hummer H2

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Low engine endurance

Message window reads low engine endurance, in my 03 hummer h2

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  • Ned C Cook
    Ned C Cook May 11, 2010

    what is low engine endurance mean?

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  • 12 Answers

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

Posted on Aug 22, 2009

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Posted on Jan 02, 2017

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05 h2 hummer replaced fuel pump and gauge worked for 1 day and back to reading over full again... what else can it be???? plus changed plugs and wires on hummer and still read misfire and i put in an oem...


A misfire could be caused by a bad , clogged fuel injector . A vacuum leak . How are you reading a misfire ? A code ? A dirty mass air flow sensor can cause misfires . Low fuel pressure ,clogged fuel filter . When you replaced the fuel pump did you replace the ceramic sending unit resistor card with a new one ?
Fuel Gage
The IPC displays the fuel level as determined by the PCM- engine computer. The IPC -instrument panel cluster receives a class 2 message from the PCM indicating the fuel level percent. The fuel gage defaults to empty if:
?€¢
The PCM detects a malfunction in the fuel level sensor circuit.


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The IPC detects a loss of class 2 communications with the PCM.

When the fuel level is less than a pre-determined value, the low fuel indicator illuminates.
Reviewing the fuel system description will further explain how the system functions. Refer to Fuel System Description .
Do you know about class 2 serial data communication .
Do

Dec 23, 2016 | 2005 Hummer H2

1 Answer

03-Humer H2 rattle, starting at 40mph, at right front dash, between firewall and interior dash. I do not believe this is a window issue. Any help appreciated


Could it be your electric radiator fan, double check by turning your a/C the fan should turn on when you turn a c on see if that's were your vibration is coming from, change your heather/ac filter Not the engine filter hope this helps

May 15, 2016 | 2003 Hummer H2

2 Answers

Where is the blend door actuator located on 03 Hummer h2. Driver side blows cold, passenger side blows hot


They are not vac on the h2. there is 2 for temp control, one for recirc and one for blend. check the hummer forum as there is a great read for it there. the driver side actuator is really ez as it's under the glovebox, 20 min fix. the rest take removing the whole dash but it's not that tough.

Jan 10, 2012 | 2003 Hummer H2

2 Answers

2003 h2 speedometer broken


Pretty common problem with these. Here's a guide to learn how to fix GM instrument clusters yourself, I used it to fix mine and it worked great.How to guide for H2 instrument cluster repair

Jun 13, 2010 | 2003 Hummer H2

1 Answer

Hummer H2 speakers not working


Check if any mute function is not activated.

Oct 18, 2017 | 2003 Hummer H2

1 Answer

2003 h2 hummer low pressure on gauge less then 40 can u help runs good and has plenty of power just low oil pressure. also chage the oil senser but nothing


These vehicles have been known to have failure of servo motors that drive your guages and routinely read wrong is this your only guage issue I just replaced three of these servos on a freinds H2 the motors are about $2 on ebay

Feb 06, 2010 | 2003 Hummer H2

1 Answer

Oil Sensor light keeps coming on 2003 H2 Hummer


There is a sensor located on the oil pan. If the plug-in to this sensor comes loose it or if the sensor fails, it will send the low oil signal. You are wise to check the oil to confirm it is not low.

Jul 05, 2009 | 2006 Hummer H3

4 Answers

2004 hummer h2 leaks water from roof over front


Seal all the lights on top. Mine flooded from the water running down the light harness wires. Used clear rtv sealant and fixed it. You will have to remove the seal the two larger lights on the corners.

Jun 23, 2009 | 2004 Hummer H2

1 Answer

Need Service Manual for Hummer H2


THIS IS THE PAGE WERE YOU CAN DOWN LOAD THE OWNERS MANUAL 400 PAGES TOTAL. WWW.HUMMERXCLUB.COM/MANUALS/2003H2.PDF

May 28, 2009 | 2003 Hummer H2

1 Answer

2003 Hummer H2 overheats while idling in Park


NED TO HAVE THE CODES FOT THE CHECK ENGINE LIGHT READ.THE CODE WIL LEAD U IN THE CORRECT DIRECTION.GET BACK TO ME W/THE CODE.

May 13, 2009 | 2003 Hummer H2

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