Hummer H3T Spark Plug Replacement at your home or office.

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Spark Plug Replacement Estimate for Hummer H3T

Hummer H3T Spark Plug Replacement costs $119 on average. Following is a breakdown of the labor and parts estimates.

YourMechanic Price
$78 to $180
Labor: $70 -$168
Parts: $8 -$12
Average Dealer price
$109 to 219
Average Shop price
$93 to 190
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
2009 Hummer H3TV8-5.3LService typeSpark Plug ReplacementYourMechanic Price$163.46Shop/Dealer Price$198.07 - $233.28
2010 Hummer H3TL5-3.7LService typeSpark Plug ReplacementYourMechanic Price$93.96Shop/Dealer Price$114.54 - $143.45
2009 Hummer H3TL5-3.7LService typeSpark Plug ReplacementYourMechanic Price$170.96Shop/Dealer Price$207.49 - $248.37
2010 Hummer H3TV8-5.3LService typeSpark Plug ReplacementYourMechanic Price$86.04Shop/Dealer Price$104.61 - $127.57
Show example Hummer H3T 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 Hummer mechanics

Real customer reviews from Hummer owners like you.

735 reviews
Peter
39 years of experience
great guy did a great job
2006 HUMMER H2 - OIL CHANGE
658 reviews
Ben
37 years of experience
Ben was very thorough and polite. He took pictures of everything we talked about so I could "see" what was going on. No work was performed as this visit was simply an inspection. I won't know more about his assessment until I have it fixed.
2004 HUMMER H2 - OTHER INSPECTIONS
505 reviews
Lucas
13 years of experience
Lucas has worked on y Hummer several times and he has always solved the issue Ina timely and professional manner . He will be my macanic as long as I live in California. I highly recommend Lucas if you want the job done righ .
2005 HUMMER H2 - CAR IS NOT STARTING INSPECTION
369 reviews
Patrick
28 years of experience
Patrick is very knowledgeable and takes his time to get the job done right!! I had 2 broken bolts in my exhaust manifold and he didnt give up or rush the job or tell me to take the job elsewhere to get it machined out.. (which would have cost me double the labor cost) Patrick was at my home from 7am and stayed until 2am to make sure my car was running and done perfectly!! As I had out of state company coming the next day. I will definitely use Patrick for all my future mechanic needs and Im so lucky to have found an honest, ethical and dependable mechanic/person. Its very rare these days!!
2006 HUMMER H2 - EXHAUST MANIFOLD REPAIR
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
2009 Hummer H3TV8-5.3LService typeSpark Plug ReplacementYourMechanic Price$163.46Shop/Dealer Price$198.07 - $233.28
2010 Hummer H3TL5-3.7LService typeSpark Plug ReplacementYourMechanic Price$93.96Shop/Dealer Price$114.54 - $143.45
2009 Hummer H3TL5-3.7LService typeSpark Plug ReplacementYourMechanic Price$170.96Shop/Dealer Price$207.49 - $248.37
2010 Hummer H3TV8-5.3LService typeSpark Plug ReplacementYourMechanic Price$86.04Shop/Dealer Price$104.61 - $127.57
Show example Hummer H3T Spark Plug Replacement prices

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