Question about GMC Yukon XL

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2003gmc yukon 1500xl 5.3l key on no check engine light,security light on,traction light on,no shift indicator,gas not working,check for codes,powertrain no module comm.,antilock current u1000 history u1000,air bag u1000,u1000,transfer u1000,u1000,bcm u1000,b2961, u1000 b2961,heat air u1000,u1000, ipc u1000,u1000,susp esc no respone

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2003gmc yukon 1500xl 5.3l key - 6b6f650.jpg


All of these codes have to deal with a lost communication with the IPC- or instrument panel cluster, When this happens the vehicle thinks it is being stolen and goes into lock down mode, unfortunatly the only way to resolve this is to have it towed to a local GM dealer so that they can reset the theft system , I hate to be the one to bring bad news, but this one just can not be solved without sofisticated equipment involved.

Several TSB's about this associated with other codes.

Hope this help.

Posted on May 12, 2010

  • whirlingdirv
    whirlingdirv Jun 04, 2012

    hey tomvescovi just wondered if you ever got this problem sorted out...im having the same issue with mine.!!! any ideas would help

    thanks

    nathan

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Have the engine computer checked for trouble codes.

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If the engine does not crank, I doubt it has anything to do with the fuel system. You would need to find out if you have power at the starter posts when the key is in start position. Will it crank in neutral, and is the security light flashing ?

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Stop in to one of the bigger parts stores like Autozone, Pep Boys etc., and they will scan it for free to point everyone in right direction. Guessing will only cost more money. If not obvious from code retrieval what the problem is, get back to us with those codes and we will gladly assist you further.

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YOUR CAR IS IN THEFT SECURITY MODE.TRY USING DIFFERENT KEY.IF ANOTHER KEY DONT WORK.YOU HAVE PROBLEM IN THE SWITCH AND BCM.TO GET CAR TO STARTED TURN THE IGNITION WITH KEY IN TO ON POSITION WITH ENGINE OFF FOR 10 MINUTES.WATCH THE PADLOCK.IF IT TURNS OFF.TURN OFF IGNITION SWITCH FOR 5 SECONDS.THEN TRY TO START ENGINE.IF ENGINE STARTED PROBLEM IS IN THE IGNITION SWITCH AND BCM.IF YOU GET VECHICLE RUNNING NOT SAFE TO DRIVE BECAUSE THE VECHICLE WILL GO IN THEFT MODE SHUT OFF YOUR FUEL PUMP WHILE YOU ARE DRIVING IN HEAVY TRAFFIC. DONT LET GO GET IT FIX FOR YOUR AND FAMILY SAFETY.

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RECENTLY MY CHECK ENGINE LIGHT CAME ON THEN MY TRACTION CONTROL LIGHT CAME ON....THE CODE GIVEN TO ME FOR THE CHECK ENGINE LIGHT WAS P0171 COULD THEY BE RELATED....ALSO CAR IS SHIFTING REAL ROUGH


Engine light on means that your lambda probe is malfunctioning just raplace it and it will come off,or the mixture of gases and gas is not proper and you need to tune the car at bosch motronic.
traction control warning light means that the sensors analizing it are malfunctioning and or you have a serious problem on the traction control

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check on paperwork for vehicle and only use that size and speed rating as specified ,or vehicle will fail annual mechanical vehicle inspection for not having the correct tyres fitted

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1 Answer

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Theft light on indicates a problem with passlock. You have a problem with the key or ignition switch. When I worked I replaced a lot of ignition switches, so i would say that would be your problem.

Give this a try it might work for you........
When you put the key in ignition, turn it on (not to crank) dos the security light start flashing? If so, you need to either wait 15 minutes or wait with the key on until it stops flashing. Once it stops flashing, try to start again. You should get to try it 2 times before the passlock will lock up again.

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