Question about 2008 GMC Yukon Denali

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Replaced the stop light switch in 2008 yukon and back lights still don't come on

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  • 171 Answers

Have you checked the bulbs to see that they have not blown? Perhaps the fuse has blown?

Posted on Nov 28, 2013

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Posted on Jan 02, 2017

  • 54 Answers

SOURCE: brake switch

look above the pedal and you should see a switch that looks like a plunger with wires coming out of it unplug the wire harness and then the switch should "pop" right out of the bracket or might be screwed in take it to dealer or autoparts store, some parts like that are dealer only if you can wait check out GMpartsdirect.com

Posted on Jun 28, 2009

  • 2 Answers

SOURCE: 2007 Yukon tail stop lights wont light up

It sounds like the brake switch, that is usually located along the shaft of the brake peddle under the dash, these sometimes are in a bracket for ajustment may not be able to depress switch. Falow starting at peddle go up to dash, you should be able to see it. Hope this helps.

Posted on Sep 08, 2009

  • 56 Answers

SOURCE: 1999 GMC Yukon, Do I need to replace the stop

Hey do-it your-selfer are your brakes O.K. Do you have to push youpedal down "real hard to the floor" after you hung all these parts on your Yukon! If so check to make sure the vacuum line is hooked up to the booster. Anyway the brake switch itself is not that hard. You can remove a panel under the steering column to get more room. Pull the switch up from the brake pedal bracket till it comes out. Install the new one, connect the wires. If you push it in to far, put both feet under pedal and gently pull up, you'll hear it set itself. Have someone check brake lights while you step on pedal. Good luck, best regards.

Posted on Feb 01, 2011

  • 9 Answers

SOURCE: 1996 GMC Yukon 5.7 Brake and

here is a wiring diagram. Are the bulbs for sure good?
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hope you can read it.

Posted on May 03, 2011

  • 743 Answers

SOURCE: Is there an adjustment for the stop light switch

There is no adjustment. The park lights are on a different circuit than the brake lights.
Do you have a third brake light that works. Its also on a different circuit but works from the same switch. Do your turn signals work. They use the same filament as the brake lights.
Also, the brake light circuit goes through the multi function (turn signal) switch.

Since the brake lights and turn signal lights use the same filament in the bulbs, the brake light circuit will pass through the turn signal switch. When a turn signal is used it cancels out the brake light for that side.

Let me know if your third brake light and turn signals work in the rear.
Also, if youy have not already, check/change the bulbs. The type of sockets those lights are in also get burned so look at them well.

Posted on Oct 18, 2011

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I have a 2007 yukon denali xl, I got my front brakes and right wheel hub changed. When he got doney brake lights in the back of the truck wI'll not shut off. Brake light switch did nothing to help..


Who put the front brakes an wheel hub bearing on the vehicle ? A qualified repair shop ? A friend ? The front brakes an wheel hub would have nothing to do with the brake lights . An the brake light switch is an input to the BCM - body control module .
Stop Lamps
When the driver presses the brake pedal, the switch contacts open and battery positive voltage is interrupted to the BCM. The BCM then supplies voltage to both the turn/stop lamp supply voltage circuit and trailer rear turn/stop lamp supply voltage circuits. The BCM also supplies voltage to the CHMSL though a dedicated circuit.
I suggest you take it back to who did the front brakes , or a quailfied repair shop .
DTC B3445 00: Stop Lamp Circuit - DO you know what a DTC is ? diagnostic trouble code !
Diagnostic Fault Information
Circuit
Short to Ground
Open/High Resistance
Short to Voltage
Signal Performance
Stop Lamp Supply Voltage
B3445 00
--
Stop Lamps Inoperative
Stop Lamps Always On
Circuit/System Testing
Disconnect the stop lamps and test the individual stop lamp assemblies for internal shorts between all terminals.
? If a short between terminals is found, replace the stop lamp socket or circuit board as applicable.
Test the stop lamp supply voltage circuit for a short to ground.
? If all circuits/connections test normal, replace the BCM.

Nov 09, 2016 | 2007 GMC Yukon XL Denali

1 Answer

Cruise control for 2008 Yukon XL


The most common problem is brake light switch, assuming all other items are ok.

Feb 23, 2015 | 2008 GMC Yukon XL

1 Answer

How to get water out of my 2008 yukon xl headlight


I think that has 2 metal L shaped retaining bars on back sides of assembly. Pull those up and top section falls off basically..remove bulb by twisting and pour water out..can drill small hole in bottom back side to let future water drain..if hole is seen it can be failed for inspection...but so can water or condensation in light..
Replace assembly a seal is bad or cracked
The bottom light is held in w a tab behind light once top section is out it will visible le

Sep 03, 2014 | 2008 GMC Yukon XL

1 Answer

1999 Yukon Denali stop shifting out of park.


Check the brake lights when this happens, if they are not on then you have found the problem it is the brake light circuit. Go under the dash if the brick lights don't work and check the brake light switch above the brake pedal, it should have 12 volts in and out with the brake pedal pushed down. See typical brake light switch location below. #4 in diagram is brk lite switch.
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Oct 11, 2012 | 1999 GMC Yukon Denali

2 Answers

Why would dashboard lights and radio lights fade, go out and then be ok later? I have a 2008 Yukon


i would check tightness of battery cables ,also the wires that go to the alternator good luck

May 24, 2011 | 2008 GMC Yukon

1 Answer

I have 2008 yukon. i have replaced 7 headlamps


Check the plug ins. Than check the light bulbs and see if they are melted If that is the case than you have to find the bad wires eather way it has something to do with your wires

Apr 20, 2010 | 2001 GMC Yukon Denali

1 Answer

'02 GMC Yukon - Backup Lights


have you tried replacing the switch on the gearbox????

Apr 02, 2010 | 2002 GMC Yukon XL

1 Answer

How to change the headlight bulb 2008 yukon


Open the hood, above each headlight is 2 rods, unlatch the rods and lift striaght up, the headlight will now lift out and you can replace the bulb, It turns about 1/3 of a turn left to unlatch the bulb. After the bulb is replaced, set headlight back in place and push the rods back down, you may need to wiggle the light housing to align the holes so the rods seat all the way down.

Oct 24, 2009 | 2008 GMC Yukon

2 Answers

2007 Yukon tail stop lights wont light up


It sounds like the brake switch, that is usually located along the shaft of the brake peddle under the dash, these sometimes are in a bracket for ajustment may not be able to depress switch. Falow starting at peddle go up to dash, you should be able to see it. Hope this helps.

Sep 08, 2009 | 2004 GMC Yukon

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