Hummer H3T Ignition Coil Replacement at your home or office.

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Ignition Coil Replacement Service

How much does a Ignition Coil Replacement cost?

On average, the cost for a Hummer H3T Ignition Coil Replacement is $444 with $304 for parts and $140 for labor. Prices may vary depending on your location.

CarServiceEstimateShop/Dealer Price
2009 Hummer H3TL5-3.7LService typeIgnition Coil ReplacementEstimate$1061.02Shop/Dealer Price$1270.04 - $1884.12
2010 Hummer H3TL5-3.7LService typeIgnition Coil ReplacementEstimate$753.79Shop/Dealer Price$907.57 - $1364.80
2009 Hummer H3TV8-5.3LService typeIgnition Coil ReplacementEstimate$1402.38Shop/Dealer Price$1697.56 - $2576.39
2010 Hummer H3TV8-5.3LService typeIgnition Coil ReplacementEstimate$1087.27Shop/Dealer Price$1324.45 - $2031.80
Show example Hummer H3T Ignition Coil Replacement prices

What is an ignition coil and how does it work?

An ignition coil transforms ignition voltage (12 volts) to the very high voltage pulses (20,000 volts or more) that fire the spark plugs. The number of ignition coils varies depending on car model and year of production. Older cars will have one coil covering all engine cylinders while newer cars may have a coil-on-plug type arrangement — that is every cylinder will have its own dedicated ignition coil.

Ignition Coils

When to consider replacing an ignition coil:

  • Hard starting or no start. Ignition coils are subject to heat damage and electrical overload, both of which can cause partial or total failure. If the coil is faulty, you may have difficulty starting your car or it may not start at all.
  • Misfiring, loss of power, poor acceleration. Once the car is running, a bad ignition coil can cause poor operation of the engine. Should you have misfiring or loss of power, faulty ignition coils would be among the list of causes a mechanic would investigate. The Check Engine Light will often come on with a trouble code(s) indicating which cylinders are involved.

How do mechanics replace the ignition coil?

  • The ignition is checked to assure it is in the “off” position.
  • For single coils that supply all cylinders, the coil is disconnected from either a bracket located in the engine compartment or, in some cases, is removed from within the distributor. The replacement coil is secured and all electrical connections reattached. If the distributor was removed for any reason, the timing is adjusted as required.
  • For individual coil-on-plug applications, the coil is detached from the top of the individual spark plug and replaced.
  • Once the coil is securely in place, all electrical connections are reattached, and timing adjusted as needed, the car is road tested to ensure normal operation.

Is it safe to drive with an ignition coil problem?

Yes. A malfunctioning ignition coil will cause loss of power and lower fuel efficiency but that will not present an immediate safety issue. If the coil malfunction is causing misfiring, this will allow unburned fuel to enter and permanently damage the catalytic converter from overheating.

When replacing an ignition coil keep in mind:

  • Ignition coil failure can be caused by faulty spark plugs or wires. The mechanic will inspect and may recommend replacement of those components.
  • In a coil-on-plug ignition system, if only one coil fails, you need only replace the faulty coil. Remaining functioning coils can be left in place.
  • In systems with the coil located in the distributor, it may be more cost-effective to replace the entire distributor rather than remove and replace just the coil.

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Meet some of our expert Hummer mechanics

Real customer reviews from Hummer owners like you.

Excellent Rating

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Colby

15 years of experience
66 reviews
Colby
15 years of experience
Hummer H3T L5-3.7L - Exterior Door Handle Replacement (Passenger Side Front) - Longmont, Colorado
Great service, quick and efficient. Wrong color door handle but I agreed to have it installed because I will paint it in the future.

Joe

44 years of experience
838 reviews
Joe
44 years of experience
Hummer H3 L5-3.7L - Ignition Coil Replacement - Saint Petersburg, Florida
joe is always professional and on time,and most important great mechanic with many years of experience ,and all around just a nice guy,

Nathan

22 years of experience
298 reviews
Nathan
22 years of experience
Hummer H3 L5-3.5L - Ignition Coil - Austin, Texas
Both times Nathan has been very kind and patient! I would definitely recommend him to anyone!!

Jean

26 years of experience
70 reviews
Jean
26 years of experience
Hummer H3 L5-3.5L - Ignition Coil - Lawrenceville, Georgia
Jean arrived on time and was very knowledgeable and efficient at his skill set

Excellent Rating

(3)

Rating Summary
3
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3
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Number of Hummer Ignition Coil Replacement services completed
33+
services done by our mechanics
TOTAL NUMBER OF EXPERT Hummer MECHANICS
200+
experts on our platform

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