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Vehicle Fit

Part Details

  • Quantity:   6 Piece Set

The ignition coil is a crucial part of your ignition system. It's function is to convert the 12 volt power of your vehicle's electrical system in to 35,000 or more volts. This produces a high intensity spark at the spark plug which then ignites the fuel in the cylinder. Coils in general will wear out over time. This will cause a misfire condition. In engines like this with one coil per cylinder you can diagnose a coil by putting a timing light on each one to make sure it is lighting the light consistently.

This Coil Over Plug Ignition Coil features the following specifications:

  • Comes as a SET:
    • Includes Six (6) Coils
  • Brand New
  • Replaces dealer part number: 88958974
  • Built to strict quality control standard
  • Direct replacement
  • 100% factory tested

These coils are for a distributorless application. Sold as a SET of SIX. Please see our other listing if a single coil is needed.


Our electrical and electronic parts are subject to strict quality control testing. Please ensure proper diagnosis of this item before purchasing as the item cannot be returned once installed or plugged in.

Direct Fit Replacement

Guaranteed to fit and function properly for your specific application.

Optimum Performance

Meets or exceeds requirements of the vehicle. Provides the correct primary and secondary resistance, voltage output, and spark energy needed to restore original operating condition.

Premium Quality

Manufactured with quality materials to meet highest quality control standards in the industry.

Item Condition: New

Lifetime Warranty

This item is backed by a Limited Lifetime Warranty. In the event this item should fail due to manufacturing defects during intended use, we will exchange the part free of charge (excludes shipping charges) for the original purchaser.

  1. step : Removing the Air Intake Box (0:57)
    • Remove the two 8mm bolts holding the top of the air box
    • Remove the two hose clamps with a flat blade screwdriver
    • Twist and remove the two vacuum lines
    • Pull the air intake box up and out
    • Twist the air intake hose collar off
  2. step : Removing the Ignition Coil (2:45)
    • Disconnect the locking tab with a flat blade screwdriver
    • Disconnect the ignition coil wiring harness
    • Remove the 10mm bolt from the engine coil
    • Pull the ignition coil up and out
  3. step : Installing the New Ignition Coil (3:59)
    • Insert the ignition coil into place
    • Insert and tighten the 10mm bolt
    • Connect the ignition coil wiring lead
    • Replace the locking pad
  4. step : Installing the Air Intake Box (5:01)
    • Twist the air intake hose collar into place
    • Insert the air intake box into place
    • Insert the two vacuum lines
    • Insert and tighten the two hose clamps with a flat blade screwdriver
    • Insert and tighten the two 8mm bolts holding the top of the air box

Tools needed for replacement:

    Ratchets & Related

  • Ratchet
  • Socket Extensions

  • Screwdrivers & Related

  • Flat Blade Screwdriver

  • Sockets - Metric

  • 10mm Socket
  • 8mm Socket

4.90/ 5.0
29 reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Star
My truck is running like a new truck! I have ordered parts from here more than once
January 28, 2017
Ignition coils
These coils are very similar to the factory originals. I was able to remove the old ones, change the plugs and install the new ones in just over an hour. I matched them with iridium plugs and my gas mileage increased by a couple miles per gallon. No sputtering when hitting the throttle, quick and easy start-up and backed by a very nice warranty. Overall, very happy with my purchase and look forward to not having to replace this part for many years to come. What more can I say, quality at an affordable price. Doing business the way it should be done. Great job A1 Auto.
April 24, 2017
This was a great purchase, parts all went in as they stated and the video made it easy to save the 300 dollars they wanted to put them in. I would highly recommend if you are handy that you try 1aauto for your next repair, shipping was free and parts came earlier than they said.
June 28, 2017
Quality product
Quick shipping.. excellant Customer service.. product exactly as described.. definitely will shop again!
July 2, 2017
Made my truck run brand new
I got these coils replaced in like 30 mins with common hand tools and now my truck runs brand new, the engine runs a lot smoother and my gas mileage is better. Also for only 119.95 and you get 6 coils!? That is a crazy good deal, I will definitely be buying more parts from here.
August 1, 2017
Great Service
The coil pack for my 2004 GMC Envoy shipped on time, great product and it runs great again. I also enjoyed the videos they produce.
August 3, 2017
August 24, 2017
The coils I bought from 1 A Auto was a perfect match. The were also much cheaper than an auto parts store.
November 21, 2017
Just what I needed
Exact match and easy to install. Product arrived quickly.
December 27, 2017
Fired Up !!
This is the best deal on the internet. These ignition coils are just like the originals. they fit perfect. also they have my chevy Trailblazer purinning like a kitten. Thanks 1A Auto. Qball901 from Memphis,TN.
January 29, 2018
Great Purchase
My wifes car runs like it was new. I have recently started buying auto parts online and I dont know why I waited this long to do it. Thanks 1a auto.
February 5, 2018
Customer Satisfaction
I love this company. They truly believe in making their customers feel as if nothing else matters at that time. I did have a issue that was taken care of right away and thanks to Joshua it all was resolved. I will continue to be a return customer for the quality parts and the customer service that sets this company apart from the rest. God bless. Mark R. Fairfield twp. Oh.
February 5, 2018
Work real good took less a hour to install,solve half the problem ,no more misfiring,might have the timing checked,injectors ckeaned
March 12, 2018
Great price for 6 coils. Installed without an issue and work perfectly. Will be making more purchases from 1A Auto in the future.
March 16, 2018
omg the best i have my car running beautiful it ride better then it ever did i took it out of town this past weekend it was awesome on the road i’m so glad to know about this company
March 28, 2018
Love it
I love this site and I will be using it more often
April 16, 2018
Purchase of Coil packs
I would just like to say that my purchase was delivered in a timely manner and it was exactly the parts I ordered so I Would highly recommend 1aauto ...
May 2, 2018
May 21, 2018
Worth every penny!
I was skeptical on this purchase, but i took a chance and wow! This product fit perfectly and worked just as good as factory. This is the start of a good relationship between me and 1A auto. Also on another note, I really enjoy the YouTube videos they produce, not only selling the product, but having a step by step on how to fix it
August 10, 2018
03 envoy coil packs
These were a fraction of the cost from autozone. The parts are nearly identical to the factory ones I replaced. The fitment was exact. I wasnt experiencing a misfire, but I knew the 4.2 had an issue with failed coils so I replaced the coils and plugs proactively. Therefore, I cant say that my SUV runs any better, but I did see fuel mileage increase. Shipping was fast and free.... thats always nice too.
August 26, 2018
Ignition Coil
I’m so pleased with the coils. They were very easy to install. I will continue purchasing car parts from 1aauto and will refer and invite others to purchase from here. Thank you!!!
September 7, 2018
The best costumer service
These guys are the best!! They solved my problem in no time.
September 11, 2018
Great product and perfect fit to tune up your Trailblazer
I would highly recommend these coils as they were a perfect fit and excellent quality replacements for the originals at a much better price. Install was a snap thanks to the 1A Auto videos and it brought new life to my old 2004 trailblazer. Shipping was super fast and customer service is always great!
October 2, 2018
Worked perfectly
Bought them after reading the reviews. Was not disappointed. The coil packs fit perfectly. No problems with the clips not fitting. My 2004 Envoy runs great again.
October 26, 2018
Good for the cost
the fit good. works okay but not great for pick up. My SUV is hesitating to accelerate above 65mph. I may have to get the branded parts to get the acceleration i was expecting to see. Over all good the cost i got.
November 5, 2018
Ignition Coils
Parts arrived on time one week later. Free shipping was great. All fit my car perfectly. Running like a new vehicle. Highly recommend 1A Auto.
November 7, 2018
Satisfied customers
As you can see, i keep coming back to order with this company. They are amazing! Thanks again for the informative videos. Satisfied
November 12, 2018
Solved my problem.
I was a little concerned with the much lower than OEM price on these, but all 6 worked with no issues and seem to be quality made. The misfire issues I was having have completely resolved and I am very happy with my purchase.
November 20, 2018
M? super trail blazer
this coil pack was affordable. made my trial blazing
November 23, 2018
Will this fit my car? Add a vehicle to make sure
Customer Q&A
Ask a question to 1A Auto customers who purchased the product
Who is the manufacturer?
Gary W August 29, 2016
Generic no name but I havent had any problems with it still running strong almost 3 years
Nina N August 29, 2016
1A Auto
Andre J August 30, 2016
Do not see any markings on the part - the box references Vendor #V0193, so maybe you can ask 1A Autos customer service to look it up? Sorry I couldnt be of more help.
Lynn H August 30, 2016
We have a few different aftermarket companies build these parts specifically for us, as our 1A Auto house brand. They are manufactured to the same OEM specifications as the original part that came with your vehicle. If you have any further questions, please dont hesitate to ask.
Brian F August 30, 2016
i will try and locate some info this weekend at the moment i dont know
Richard C August 30, 2016
Not sure...i no longer own the truck...
Demetrius J August 31, 2016
Year Make Model Description
2004-2005Buick Rainier Buick Rainier Ignition Coil 6 Piece Set L6 4.2L
2002-2005Chevy Trailblazer Chevy Trailblazer Ignition Coil 6 Piece Set L6 4.2L
2002-2005Chevy Trailblazer EXT Chevy Trailblazer EXT Ignition Coil L6 4.2L 6 Piece Set
2002-2005GMC Envoy GMC Envoy Ignition Coil 6 Piece Set L6 4.2L
2002-2005GMC Envoy XL GMC Envoy XL Ignition Coil L6 4.2L 6 Piece Set
2004-2005GMC Envoy XUV GMC Envoy XUV Ignition Coil L6 4.2L 6 Piece Set
2003-2005Isuzu Ascender Isuzu Ascender Ignition Coil 6 Piece Set L6 4.2L
2008Isuzu Ascender Isuzu Ascender Ignition Coil 6 Piece Set L6 4.2L
2002-2004Oldsmobile Bravada Olds Bravada Ignition Coil 6 Piece Set L6 4.2L
2005Saab 9-7X Saab 9-7X Ignition Coil 6 Piece Set L6 4.2L
Part #: 1AERK00112

Order must be placed by 4pm ET

Get it in: 2 - 4 Business Days

Want it sooner? Choose Next Day Air at Checkout

How-to Video:

(07:32 min)