Spark Plug Replacement at your home or office.

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Spark Plug Replacement Estimate for GMC Sierra 3500

GMC Sierra 3500 Spark Plug Replacement costs $112 on average. Following is a breakdown of the labor and parts estimates.

YourMechanic Price
$108 to $128
Labor: $105 -$120
Parts: $3 -$8
Average Dealer price
$146 to 156
Average Shop price
$129 to 135
Get an instant quote for your car
Our mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing
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CarServiceYourMechanic PriceShop/Dealer Price
2002 GMC Sierra 3500V8-6.0LService typeSpark Plug ReplacementYourMechanic Price$113.90Shop/Dealer Price$137.90 - $160.91
2006 GMC Sierra 3500V8-6.0LService typeSpark Plug ReplacementYourMechanic Price$113.73Shop/Dealer Price$137.80 - $160.76
2005 GMC Sierra 3500V8-6.6L Turbo DieselService typeSpark Plug ReplacementYourMechanic Price$109.54Shop/Dealer Price$132.49 - $152.26
2004 GMC Sierra 3500V8-8.1LService typeSpark Plug ReplacementYourMechanic Price$113.89Shop/Dealer Price$137.96 - $161.01
2002 GMC Sierra 3500V8-8.1LService typeSpark Plug ReplacementYourMechanic Price$114.06Shop/Dealer Price$138.12 - $161.26
2003 GMC Sierra 3500V8-6.6L Turbo DieselService typeSpark Plug ReplacementYourMechanic Price$109.63Shop/Dealer Price$132.56 - $152.36
2005 GMC Sierra 3500V8-6.0LService typeSpark Plug ReplacementYourMechanic Price$113.94Shop/Dealer Price$138.08 - $161.22
2001 GMC Sierra 3500V8-6.0LService typeSpark Plug ReplacementYourMechanic Price$113.73Shop/Dealer Price$137.79 - $160.75
Show example GMC Sierra 3500 Spark Plug Replacement prices

Spark Plug Replacement Service & Cost

What are the Spark Plugs all about?

The spark plugs are an important part of the ignition system. When you turn the ignition key (car's key) on, it causes the ignition coil to generate the spark which ignites the air-fuel mixture in the engine cylinders to start the engine. The number of spark plugs in the car is the same as the number of cylinders, although some vehicle manufacturers will use two spark plugs per cylinder.

Over time, the spark plugs wear out and require replacement. When the spark plugs wear out, it is harder for it the air-fuel mixture to ignite, resulting in engine misfires. If one of the spark plugs has failed, the car will still start and run, but it will run poorly. On some vehicles, spark plug replacement may be labor intensive and involve removal of the intake plenum.

Spark plugs-MATROX-1

Keep in mind:

  • When the spark plugs are replaced, it is a good idea to inspect the ignition cables as well.
  • Spark plugs come in numerous ratings, and the correct rating for your vehicle should always be used.

How it's done:

  • Scan the car for codes.
  • Clean all surface areas around the spark plugs.
  • Remove spark plugs.
  • Inspect threads in engine head (where plugs are installed).
  • Perform compression test if needed.
  • Inspect ignition wires.
  • Apply anti-seize to the threads of the spark plugs.
  • Install new spark plugs.
  • If needed replace any gaskets removed.

Our recommendation:

During routine maintenance and checkups, your ignition system should always be inspected. Any time that a component of the ignition system is replaced, it’s a good idea to consider replacing the spark plugs as well. If you don’t preemptively change your spark plugs your engine will let you know by misfiring or running poorly, so schedule an inspection as soon as you notice that your engine is not performing properly.

What common symptoms indicate you may need to replace the Spark Plugs?

  • Check Engine light is on.
  • Engine misfires.
  • Poor fuel economy.
  • Vibration coming from the engine.

How important is this service?

Spark plugs are responsible for igniting the fuel that your engine uses to run. When you turn your key, a small voltage of power is sent to the ignition coil, where it is transformed into high voltage currency. This high voltage currency is sent through the ignition cables to the spark plugs. The spark plugs use the power to create a spark, which ignites the fuel, and allows the engine to function.

When the spark plugs malfunction, this spark won’t be created, and the fuel will not be ignited as it should. Your vehicle has many spark plugs, so depending on how many fail, your engine may either run poorly, or not run at all. Continuing to drive a vehicle with malfunctioning spark plugs can also cause damage to the catalytic converter.

Fast and easy Spark Plug Replacement service at your home or office.

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Meet some of our expert GMC mechanics

Real customer reviews from GMC owners like you.

471 reviews
Peter
38 years of experience
Excellent
1999 GMC K2500 SUBURBAN - SPARK PLUG REPLACEMENT
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450 reviews
Ben
36 years of experience
Ben was very thorough in explaining to me his findings. He is professional and friendly. I will definitely be coming back and will surely recommend him to others I know that need a good honest mechanic. Thank you very much for ensuring my confidence in my vehicle again.
2005 GMC SIERRA 1500 - CREAKING NOISE WHEN TURNING THE STEERING WHEEL INSPECTION
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445 reviews
Chris
17 years of experience
He did a great job with our repair. He was friendly and knowledgeable.
2007 GMC YUKON - ENGINE MOUNT REPLACEMENT (FRONT, SIDE)
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126 reviews
Tyrone
6 years of experience
Tyrone was very descriptive and honest with the issues and even went the extra mile while providing service to my vehicle.
2008 GMC YUKON - CAR STARTER REPAIR
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Get an instant quote for your car
Our mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing
Get a quote
CarServiceYourMechanic PriceShop/Dealer Price
2002 GMC Sierra 3500V8-6.0LService typeSpark Plug ReplacementYourMechanic Price$113.90Shop/Dealer Price$137.90 - $160.91
2006 GMC Sierra 3500V8-6.0LService typeSpark Plug ReplacementYourMechanic Price$113.73Shop/Dealer Price$137.80 - $160.76
2005 GMC Sierra 3500V8-6.6L Turbo DieselService typeSpark Plug ReplacementYourMechanic Price$109.54Shop/Dealer Price$132.49 - $152.26
2004 GMC Sierra 3500V8-8.1LService typeSpark Plug ReplacementYourMechanic Price$113.89Shop/Dealer Price$137.96 - $161.01
2002 GMC Sierra 3500V8-8.1LService typeSpark Plug ReplacementYourMechanic Price$114.06Shop/Dealer Price$138.12 - $161.26
2003 GMC Sierra 3500V8-6.6L Turbo DieselService typeSpark Plug ReplacementYourMechanic Price$109.63Shop/Dealer Price$132.56 - $152.36
2005 GMC Sierra 3500V8-6.0LService typeSpark Plug ReplacementYourMechanic Price$113.94Shop/Dealer Price$138.08 - $161.22
2001 GMC Sierra 3500V8-6.0LService typeSpark Plug ReplacementYourMechanic Price$113.73Shop/Dealer Price$137.79 - $160.75
Show example GMC Sierra 3500 Spark Plug Replacement prices

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