Question about 2001 GMC Yukon Denali

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How do you reset the check engine light on GMC Yukon 2004

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6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

  • 375 Answers

SOURCE: '04 GMC Yukon Denali Check Engine Light

Did u put in fuel shortly before the light came on? I own 2 service centers & the most common situation with "Check Engine" lights are because the fuel cap wasn't re-installed or not tightened. When you refuel make sure it "clicks" when putting back on. We don't charge for a "Code Reading" but a dealer will, don't go there. Go, like the others suggested. If it is the fuel cap & you re-install it correctly, the light will go off after a short drive. Good Luck. PS-Don't panic when the "Check Engine" light comes on unless it blinks, if that happens don't drive. PSS-RE: Murray's, Auto-Zone.......If it's a "Code" (the reader will give a #) the code book will tell you the problem. PSSS-Some1 please have Troy W's Mommy & Daddy take away his keyboard. Just because you can put together a "Lego" car doesn't make you a master mechanic. You only repeated what we said except you have a "Napoleon" complex against any1 plugging something in to a vehicle. It's the same as plugging in a light @ home. In conjunction with "kinder" nine out of ten time in my experience it usually is the oxygen sensor(s) which would be about right with the year model

Posted on May 18, 2008

  • 3 Answers

SOURCE: check engine light 2004 GMC Yukon

When my check engine light went on, it was a oxygen sensor

Posted on Jan 15, 2009

  • 1608 Answers

SOURCE: check engine light on 2004 GMC Yukon XL

Code po449 is the canister vent valve solenoid error.This is a common problem with these valves because they are under the truck in the rear by the spare tire and they get all the dirt and water and snow,if you live in an area where you get snow.You will find it on the canister under the vehicle by the spare tire.

Posted on Nov 18, 2009

  • 10 Answers

SOURCE: Heated seats won't stay on in 2004 GMC Yukon Denali

See GM TSB 05-08-143-001, If you have Adjustable pedals, especially if they don't work with the memeory buttons, but function with thier own buttons. Its the Brake Pedal Position Sensor is shorted and mesing up the seat module which controls the heaters too. My 05 Suburban had the same issue

Posted on Dec 11, 2009

  • 6 Answers

SOURCE: HOW DO I RESET THE CHANGE OIL LIGHT ONCE THE OIL

look in the manual......turn the ignition to the on position not starting it of course and then pump the gas petal 5 times then the light will blink a few times turn off then back on...problem solved

Posted on Mar 09, 2010

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1 Answer

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Hello, have you tried to unhook the negative side of the battery for about 10 minutes and then go from there . It should reset the computer completely .

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I just had my fuel sending unit replaced for this same reason. The top of the unit where the lines connect rust and begins to loose gas preasure. However the gas pump and sending unit cannot be purchased seperatly it will run you about $300.00
My problem persisted long enough for the Check Engine Light to come on though Now i have to learn how to reset it..

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Check engine light 2004 GMC Yukon


When my check engine light went on, it was a oxygen sensor

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