iFixit - Answers With Device "GMC Yukon"

2006-2014 GMC Yukon: 2007 Yukon 1500XL Engine Light

Sat, 18 Apr 2026 14:54:19 -0700

2007 GMC Yukon Denali 1500XL AWD
6.2L V8
187k miles

Been having some engine issues.
Replaced all 8 spark plugs, wires, coils.

Now at idle, no significant shaking.
Fuel System 1 and 2 status move to OL-Fault after a minute or so
Then traction control and stability lights come on
Followed by flashing check engine - P0300 multiple misfires

Check each cylinder report - 0 misfires on all

Get the RPMs to 2000 and the Fuel status 1 and 2 both go to CL.
The engine light goes away
The traction and stability lights go away

Drives fine. No noticeable issues other than the beeping an annoying flashing lights.

Issue seems to be air intake or fuel mix or sensors.

Short term fuel trim stays at 0.0% until the RPMs are up. Open loop fault?

O2 sensors seem sluggish - move between 0.9v and 0.2v.

MAF 0.78 to 0.83 pounds/min at idle
MAF 2.5 pounds/min at 2000 RPM

All the problems are at idle. I cleaned the throttle body, added fuel, did a battery reset. What else?

I threw all this into AI and it says I need to replace the front two O2 sensors. But what do humans think?

2015-Present GMC Yukon: How to replace switch on driver side seat on a 2016 Yukon

Thu, 02 Apr 2026 08:03:49 -0700

How to replace the switch on the driver side seat

⟐ Marked as duplicate April 02, 2026 at 8:03 MST

2006-2014 GMC Yukon: How do I fix my driver side retractable mirror? Motor runs but doesn’

Sun, 15 Mar 2026 01:17:57 -0700

Driver side retractable mirror does not work. Motor is working but no retraction.

⟐ Commented March 15, 2026 at 1:17 MST

2000-2006 GMC Yukon: brake pedal falls to floor

Sat, 14 Mar 2026 16:05:18 -0700

I have a 2003 Yukon denali. I have replaced front hub assemblies on both sides. both front calipers, hoses, rotors and pads. and also drivers side rear caliper. also replaced master cylinder. manually and electronically bled the brake system 10 or more times. if stitting at a traffic light after about 10 seconds the brake pedal falls to the floor slowly and the truck starts moving forward. what can cause this?

⟐ Commented March 14, 2026 at 16:05 MST

2015-Present GMC Yukon: Driver side mirror does not retract.

Sun, 15 Mar 2026 01:15:54 -0700

Driver side mirror does not retract?

⟐ Marked as duplicate March 15, 2026 at 1:15 MST

2000-2006 GMC Yukon: Why does my battery go dead sometimes and sometimes it dont

Fri, 13 Mar 2026 06:04:09 -0700

Some days when I go to start it the battery is dead and sometimes just 1 hour the battery is dead what is causing this

⟐ Answered March 13, 2026 at 6:04 MST

2000-2006 GMC Yukon: Y is my rpm in keep going high n I lose pressure

Thu, 12 Mar 2026 17:57:28 -0700

Y is my rpm going high

⟐ Commented March 12, 2026 at 17:57 MST

2000-2006 GMC Yukon: Location of radio amplifier?

Fri, 06 Feb 2026 09:06:29 -0700

My amp keeps cutting out, shuting off the sound. The radio keeps working.

⟐ Commented February 06, 2026 at 9:06 MST

2006-2014 GMC Yukon: Why is my airbag light on?

Tue, 13 Jan 2026 06:22:09 -0700

airbag light came on...scanned it came back with a B0020 code that says passenger frontal deployment loop stage 2 short to ground (symptom 02) - current dtc, history dtc, test not passed since power up, warning indicator requested.

2015-Present GMC Yukon: Power lift gate only partially opening

Mon, 29 Dec 2025 14:49:41 -0700

Rear hatch not opening all the way

2015-Present GMC Yukon: Why does my heated seats not work on the driver side?

Mon, 29 Dec 2025 01:04:16 -0700

Why does my heated seats not work on the driver side?

⟐ Commented December 29, 2025 at 1:04 MST

2000-2006 GMC Yukon: Replacing seals on the back hatch.

Mon, 15 Dec 2025 19:39:54 -0700

What kind of seals and glue do I use to replace the seals on the back hatch?

⟐ Answered December 15, 2025 at 19:39 MST

2006-2014 GMC Yukon: How to replace a 07-Yukon GM Ignition Switch Lock w/

Tue, 02 Dec 2025 16:35:56 -0700

Please show me step by step or even on video on how to replace a 07- Yukon GM Ignition Switch Lock w/ Key & Immobilizer OEM

2006-2014 GMC Yukon: My truck doesnt crank but has power

Sat, 15 Nov 2025 22:44:08 -0700

My 2007 yukon doesnt want to turn on but has power doesn't click or anything

⟐ Answered November 15, 2025 at 22:44 MST

GMC Yukon: I have a good actuator. How do I get my service 4wd off

Tue, 19 Aug 2025 10:45:52 -0700

The actuator isn’t bad but the 4wd light keeps coming on

2000-2006 GMC Yukon: No start, but it cranks over.

Wed, 14 May 2025 22:36:08 -0700

2001 Yukon XL SLT 4x4 5.3L

Problem: No start, cranks over.

History: Had bad fuel (with hydraulic oil)

Drained and Cleaned tank
Replaced fuel filter (new pump last year) 50PSI at ACC/pre start Almost 60PSI when cranking
Replaced all injectors with OEM as well as a coil pack - have spark and fuel at the rails as mentioned above (tried cleaning old injectors and that's when it quit starting)
All fuses are good.
Replaced all four O2 sensors, two of which has the wrong connector so I used the factory connectors from old ones and looked up how to match the wires. Positive they are correct. (Would this cause no start) It ran before, so I have rules this out, but maybe?
Code for TPS keeps showing up, but I replaced that long before this issue and it would start and run before I cleaned injectors...but again, plenty of fuel as and pressure at rails...no debris as far as I know fell into cylinders from injector ports...it tries to start...what am I missing?

2000-2006 GMC Yukon: Why does my brake pedal go to the floor when the engine is running but

Sun, 20 Apr 2025 07:34:19 -0700

when the engine is running, my brake pedal goes to the floor. when engine is off, I can pump up the brakes somewhat. I have changed the master cylinder and there is no fluid leak. Could the problem be with the power assist boost, or is there something else that could be the issue?

⟐ Commented April 20, 2025 at 7:34 MST

2006-2014 GMC Yukon: Why is my gas tank leaking above the tank? What could that be?

Wed, 16 Apr 2025 20:26:50 -0700

Why is my gas tank leaking above the tank? What could that be? It has leaked a little less than a quarter tank of gas a day.

⟐ Answered April 16, 2025 at 20:26 MST

2000-2006 GMC Yukon: What size star tip does the front break caliper take

Fri, 04 Apr 2025 13:49:35 -0700

What size star bolt is the front calipers mounted with?

⟐ Answer edited April 04, 2025 at 13:49 MST

2015-Present GMC Yukon: هل من الصحيح تغير زيت الفير

Thu, 20 Feb 2025 06:37:45 -0700

هل يجب تغير زيت القير بعد 100000 كيلو

⟐ Answer accepted February 20, 2025 at 6:37 MST