Hummer H3T Ignition Cable (Spark plug wires) Replacement at your home or office.

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Ignition Cable (Spark plug wires) Replacement Estimate for Hummer H3T

Hummer H3T Ignition Cable (Spark plug wires) Replacement costs $263 on average.

CarServiceEstimateShop/Dealer Price
2010 Hummer H3TV8-5.3LService typeIgnition Cable (Spark plug wires) ReplacementEstimate$354.22Shop/Dealer Price$423.84 - $579.70
2009 Hummer H3TV8-5.3LService typeIgnition Cable (Spark plug wires) ReplacementEstimate$354.22Shop/Dealer Price$423.96 - $579.91
Show example Hummer H3T Ignition Cable (Spark plug wires) Replacement prices

Ignition Cable (Spark plug wires) Replacement Service

What is the Ignition Cable (Spark plug wires) all about?

The ignition cables, also known as “spark plug wires” are part of the ignition system. They transfer the spark from the distributor or ignition coil to spark plugs that ignite the air-fuel mixture, starting the engine.

Over time, the cables can get weak and break down. This will make it harder for the spark to reach the engine cylinders, resulting in engine misfires. The car may not start at all. If one of the spark plugs has gone bad, the car will still start and run, but it will run poorly.

Keep in mind:

  • Ignition cable failure is often caused by other failing pieces in the ignition system; a mechanic should check for any other malfunctioning parts, and replace any parts of the system that don’t work.
  • Every time the ignition cables are replaced, the spark plugs should be inspected.
  • Leaking oil or coolant can cause ignition wire failure. If this is the case, the cause of the leak should be repaired or replaced, or else the new ignition wires will quickly be damaged as well.

How it's done:

  • Scan the computer system in the car for codes.
  • Inspect ignition cables (look for white spots).
  • Ohm test on individual cables.
  • Remove and replace the cables if found faulty.
  • Inspect the spark plugs.
  • Clear the codes.

Our recommendation:

Ignition wires should be replaced at least every 60,000 miles, but whenever your car is serviced, it’s a good idea to have the entire ignition system inspected. Any time that you have spark plugs replaced, it’s a good idea to have the ignition wires replaced as well. If you notice that your engine is running poorly, you should schedule an inspection.

What common symptoms indicate you may need to replace the Ignition Cable (Spark plug wires)?

  • Check Engine light is on.
  • Engine misfires.
  • Poor gas mileage.
  • Engine may shake (light vibration).

How important is this service?

The fuel in your automobile is ignited by a spark. This starts with the ignition coil, which transforms low voltage power into extremely high voltage. This high voltage is transferred through the ignition cables, and to the spark plug, where a spark is created that ignites the engine’s fuel, and powers the engine.

When one or more ignition cables fail, this voltage will not be transferred from the ignition coil to the spark plugs, and the fuel will not be ignited. Depending on how many of your ignition cables malfunction, your car will either run poorly, or won’t run at all.

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Robert

19 years of experience
798 reviews
Robert
19 years of experience
Hummer H3 - Brakes, Steering and Suspension Inspection - Denver, Colorado
Professional, competent,courteous

Chet

40 years of experience
447 reviews
Chet
40 years of experience
Hummer H3 - Power Steering Pump - San Diego, California
Good job

Oscar

15 years of experience
113 reviews
Oscar
15 years of experience
Hummer H3 - Car is not starting - Houston, Texas
Oscar was very thorough with the diagnostic. He took his time and was very knowledgeable about what was going on with the car. He also kept me in the loop letting me know what was going on. By far the best mechanic that I've dealt with and very knowledgeable.

Luis

18 years of experience
26 reviews
Luis
18 years of experience
Hummer H1 - Starter - Long Beach, California
On time, polite, professional, service done well, and fast

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YourMechanic Hummer Service

Average Rating

4.9/5

Number of Reviews

253

Rating Summary
238
9
2
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238
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4
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