Question about GMC Yukon

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I have a 2008 Yukon Denali that has thrown a P1400. This happened on a cold morning using the remote start.

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  • 128 Answers

Google p1400

Posted on Dec 31, 2013

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6ya6ya
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Posted on Jan 02, 2017

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SOURCE: What the normal transmission temp Yukon Denali XL 2008

TRANSMISSION FLUID NORMAL TEMPERATURE IS 200 DEGREES.

Posted on Sep 28, 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

Shorty1_wt
  • 324 Answers

SOURCE: Can I use snow chains on a 2007 Yukon Denali with AWD?

probably because snow chains come off and tear stuff up, studded tires would be the only alternative that I can think of

Posted on Feb 09, 2010

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1 Answer

LOW OIL PRESSSURE 2008 GMC YUKON DENALI


2008, I would start with replacing the oil pressure sending unit. Or maybe adding oil.

Feb 16, 2015 | 2008 GMC Yukon Denali

1 Answer

2008 GMC Yukon denali front heater fan won't come on checked fuses all look good rear fan works need help thanks. It's cold in ND this time of year supposed to get below zero later this weekend


If your fan works on high only, you may had a bad blower motor resistor. But if it doesn't work at all and the fuse is good, I would start by checking the fan itself. If you have or can get a 12volt test light (at local parts store), you can access the 2 wires that lead into fan and check for power and ground. Your fan is located on the passenger side behind the glove. Since you have a GM, you should have a cover that can be removed towards the very bottom. Remove cover and bottom of fan should be exposed. Clip the alligator side of test light to a good ground, then probe the 2 wires at bottom of fan. One wire should light up if you have power going to fan. If it does, you have a bad fan motor. Hope this helps you. Good luck.

Dec 27, 2014 | 2008 GMC Yukon Denali

1 Answer

2003 gmc yukon denali through a mass air flow sensor code changed still having problems with it stuttering to start and while driving on freeway or at stop light when taking off


Trouble codes? If none, then check O2 sensor outputs and replace as needed. Could be a leaking intake manifold gasket if you get "lean banks" codes. This happens in cold winters, but fixes itself in Spring.

Dec 20, 2014 | 2003 GMC Yukon Denali

1 Answer

My 2005 Yukon xl doesn't start right away in the


did you tune it up after 100,000 miles check fuel filter and also inspect all vacum hoses

Mar 26, 2012 | 2005 GMC Yukon Xl Denali

2 Answers

My 2003 is having a bad cold weather start idle up and down until it gets warm. i was told it is my cold start valve .have u ever heard of this.


There is no such thing as a "cold start valve" but there is an IAC motor that adjusts the idle speed, and they can fail/stick and not turn on the check enging light. There are a couple of things that can cause what you are describing so I wouldn't just start throwing parts at it. You really need to have a shop with a scan tool have a look at it.

Jan 25, 2011 | 2002 GMC Yukon Denali

2 Answers

2000 yukon fishing for idle on cold start.


Check for vacuum leak at intake or plenumn while it is cold , also check temp sensor. i have done a few intake manifold gaskets on these vehicles.

Dec 07, 2009 | 2002 GMC Yukon Denali

1 Answer

Truck runs rough at start-up in the mornings


If this happens only when the engine is cold or cool, I would suspect a coolant temperature senor that has lost its calibration.
One way to check would be to have the engine controller scanned when the engine is cool then cold.
The coolant temperature should be the same as the intake air temperature. If the readings are not close to one another, change the coolant sensor.
The coolant temp sensor controls the fuel mixture when the engine is cold, normal or hot.
Good luck, let me know.
Regards,

Apr 07, 2009 | 2001 GMC Yukon Denali

1 Answer

2002 Yukon Denali will not start


I have the exact some problem 01 Yukon 5.3 – Sometimes my security light also comes on for no reason? Wonder if this has something to do with the remote starter? When this does happen all I have to do is wait for 15 minutes and it fires up just fine. Pisses me off though…

Sep 08, 2008 | 2002 GMC Yukon Denali

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