Question about 2003 GMC Yukon XL

2 Answers

Why does my 2003 Yukon XL turn over but won't start?

Lights radio and dash come on fine but won't start

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  • paulmacintyre
    paulmacintyre Apr 11, 2015

    If the engine turns over but won't start, you have either no fuel or no spark. Try hitting the bottom of the fuel tank with the palm of your hand while someone cranks the engine. If it is the fuel pump it may start or try to start during the banging on the tank. If not yuo need to pull a spark plug wire off the spark plug and ground it to the engine. It should snap a good spark while the engin is being cranked to determine if spark is an issue

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2 Answers

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  • GMC Master
  • 14,585 Answers

Security? Reset is turn the key on for ten minutes, off for thirty seconds, try to start. Relearn is three times this, try to start after the third time. Have a charger on the battery. If this doesn't work. Give me more details on what it is doing as you try to start.

Posted on Apr 11, 2015

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  • Master
  • 372 Answers

Does fuel pump run ? Remove fuel cap. Have someone crank it for you,you should hear fuel pump running. If not bang on bottom of tank while cranking. If it starts fuel pump will need replacing , if not check for power to pump, if it has power,replace pump. If no power, check relay for operation

Posted on Apr 11, 2015

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6ya6ya
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Posted on Jan 02, 2017

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SOURCE: 03 Yukon denali park brake warning wont turn off

hi for info the brakes warning light on dash is also an indication that brake fluid level is low? or there may be a leak resulting in fluid level drop ? also considering age of car you may need to inspect brake pads wear ? if your car has low brake pads wear indicators attached to pads ? or the hand brake switch req's checking to ensure it is being pushed to off position when h/brak is down ? so fluid level low is the obviouse 1st check as fluid will displace from reservoir as pads wear low hence the level indicator on fill cap trips on may i suggest if it is low level b4 you top up? check your b/pads if you have not done so recently? or replaced since new ? hope this helps you locate problem best wishes from the uk

Posted on Jan 03, 2009

  • 1 Answer

SOURCE: when the ac is turned

Just had this problem and it ended up being a $14 ac tensioner pulley. 2 bolts, easy to change out.

Posted on Aug 20, 2008

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SOURCE: 2003 Alero dash lights out temporarily

a posible BCM problem. take to shop and have tested...
BCM= body control modual

Posted on Nov 27, 2008

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SOURCE: The Heater fan in my 2003 GMC Yukon XL will not turn off

I don't know if you already fixed it, but I had the same problem on my 03 yukon, TysonRicky is right. In my case it was the blower control module. You can find it right under the glovebox. It cost me close to $100 for a new one, but very easy to replace. Can't even imagine how much it would've cost me if I had a mechanic do it.

Posted on May 19, 2009

michigan man
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SOURCE: 2003 GMC throttle position sensor

try www.schramauto.com or call them at 1-800-292-1032

Posted on Mar 21, 2009

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1 Answer

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Robert

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