GMC Sierra 3500 Brake Light Switch Replacement Costs

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Brake Light Switch Replacement Service

How much does a Brake Light Switch Replacement cost?

On average, the cost for a GMC Sierra 3500 Brake Light Switch Replacement is $168 with $28 for parts and $140 for labor. Prices may vary depending on your location.

Car	Service	Estimate	Shop/Dealer Price
2004 GMC Sierra 3500V8-6.0L	Service typeBrake Light Switch Replacement	Estimate$211.84	Shop/Dealer Price$229.65 - $274.98
2006 GMC Sierra 3500V8-8.1L	Service typeBrake Light Switch Replacement	Estimate$202.83	Shop/Dealer Price$218.87 - $262.88
2002 GMC Sierra 3500V8-6.0L	Service typeBrake Light Switch Replacement	Estimate$202.83	Shop/Dealer Price$218.90 - $262.92
2002 GMC Sierra 3500V8-6.6L Turbo Diesel	Service typeBrake Light Switch Replacement	Estimate$202.83	Shop/Dealer Price$218.90 - $262.92
2003 GMC Sierra 3500V8-6.0L	Service typeBrake Light Switch Replacement	Estimate$202.83	Shop/Dealer Price$220.37 - $265.50
2004 GMC Sierra 3500V8-8.1L	Service typeBrake Light Switch Replacement	Estimate$202.83	Shop/Dealer Price$219.04 - $263.17
2006 GMC Sierra 3500V8-6.0L	Service typeBrake Light Switch Replacement	Estimate$202.83	Shop/Dealer Price$218.91 - $262.95
2005 GMC Sierra 3500V8-6.6L Turbo Diesel	Service typeBrake Light Switch Replacement	Estimate$202.83	Shop/Dealer Price$218.90 - $262.92

Show example GMC Sierra 3500 Brake Light Switch Replacement prices

What is the brake light switch and how does it work?

The brake light switch is a mechanical switch activated when you press the brake pedal. The switch has a plunger in it that contacts a lever in the brake pedal assembly. As that plunger is depressed when you push on the brake pedal, the contacts in the brake light switch closed and voltage flows to the brake lights — turning them on. The brake light switch is also in the circuit that controls the cruise control disengagement and the shift interlock safety feature installed on all newer cars. Failure of the brake light switch occurs due to wear on the internal electrical contacts in the switch, poor switch terminal connections, maladjustment of the switch, or damage to the brake pedal assembly.

When to consider replacing the brake light switch?

No brake lights. If depressing the brake pedal does not cause any of the brake lights to illuminate, the continuity of the switch will be tested. If only one brake light is out, then the issue is not the switch but rather the bulb, bulb socket or brake light circuit integrity.
Unable to shift out of park. The brake light switch is also wired into the shift interlock mechanism. If you are unable to shift out of park, with your foot on the brake, check to see if the brake lights will illuminate as you push the pedal. If they do not illuminate, failure of the brake light switch may be the cause of the no shift.
Intermittent operation of the brake lights or late operation. The brake light switch has to be in the proper position, and work consistently if the brake lights are to come on the instant you press the brake pedal. The switch can sometimes require adjustment, or the contacts may degrade, causing inconsistent operation of the switch.

How do mechanics replace the brake light switch?

The switch is first tested using a multimeter, including the terminal contacts to the switch, to determine if it is faulty. If the switch is functioning, the entire circuit must be tested to determine the cause of no brake lights.
Should the switch be judged defective, the switch is unthreaded from the mounting boss near the brake pedal assembly.
The new switch is threaded in and locked with an appropriate locknut once the new switch is properly adjusted.
The operation of the switch is tested to ensure instant illumination of the brake lights upon pressing the brake pedal.

Is it safe to drive with a brake light switch problem?

No. Should the brake light switch have failed, it is unsafe to drive the vehicle because drivers behind you will have no indication that you are slowing, intend to slow, or are stopped. Always address a failure of this type promptly to ensure your safety while driving.

When replacing the brake light switch keep in mind:

The mechanic will test the brake light switch directly to ensure that the issue is not elsewhere in the brake light circuit.
Occasionally, the issue is a maladjusted switch or a loose contact, and the mechanic can resolve the problem without switch replacement.

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Robert

43 years of experience

232 reviews

Robert

43 years of experience

by Anjanette

GMC Sierra 3500 V8-8.1L - Oxygen Sensor Replacement (Front/Upper/Upstream) - Houston, Texas

Best I have had yet with My Machanic

Peter

29 years of experience

592 reviews

Peter

29 years of experience

by Maria

GMC Sierra 3500 V8-8.1L - Check Engine Light is on - Sylmar, California

I will definitely be requesting Peter for future work. He was very knowledgeable and explained things thoroughly. Thank you!

Joel

22 years of experience

987 reviews

Joel

22 years of experience

by Carl

GMC Jimmy V6-4.3L - Brake Light Switch - Jacksonville, Florida

Joel was on time and very pleasant. He went right to work replacing my brake light switch. He finished on time and the switch worked the first time. Afterwards he gave me some good information concerning my truck which I appreciated. I will use Joel again.

Glenn

20 years of experience

86 reviews

Glenn

20 years of experience

by Corey

GMC Yukon V8-5.3L - Brake Light Switch - Washington, District of Columbia

Very Helpful and professional

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