TRQ ignition coils will have your engine running like new. TRQ ignition coils are manufactured to precise specifications using premium raw materials to optimize each vehicle's ignition system. To ensure peak performance, TRQ recommends replacing ignition coils in sets to prevent electrical output imbalances. All products are fit and road-tested in our Massachusetts R&D facility to ensure we deliver on our promise of Trusted Reliable Quality.
Product Features
High dielectric epoxy and reinforced bobbins for extended service life
Rubber, Silicone, or Phenolic Resin Shell: Prevents premature boot wear
Application Specific Design: No modifications required
Complete repair to restore your engine to like-new condition
Item Condition:New
Attention California Customers:
WARNING: This product can expose you to chemicals including Lead and Lead Compounds, which are known to the State of California to cause cancer, and birth defects or other reproductive harm. For more information, go to www.P65Warnings.ca.gov.
Lifetime Warranty
This item is backed by our limited lifetime warranty. In the event that this item should fail due to manufacturing defects during intended use, we will replace the part free of charge. This warranty covers the cost of the part only.
Returns: Parts with electrical components cannot be returned once installed.
FREE Shipping is standard on orders shipped to the lower 48 States (Contiguous United States). Standard shipping charges apply to Hawaii and Alaska.
Shipping is not available to a P.O. Box, APO/FPO/DPO addresses, US Territories, or Canada for this item.
Expedited is available on checkout to the United States, excluding Alaska, Hawaii.
Final shipping costs are available at checkout.
How to Replace Ignition Coil 2004-06 Chevy Colorado
Created on:
Tools used
10mm Socket
8mm Socket
Flat Blade Screwdriver
Ratchet
Socket Extensions
1. Removing the Air Intake Box
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. Removing the Ignition Coil
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. Installing the New Ignition Coil
Insert the ignition coil into place
Insert and tighten the 10mm bolt
Connect the ignition coil wiring lead
Replace the locking pad
4. Installing the Air Intake Box
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
Brought to you by 1AAuto.com, your source for quality replacement parts and the best service on the Internet.
Hi, I'm Mike from 1A Auto. I hope this how-to video helps you out, and next time you need parts for your vehicle, think of 1AAuto.com. Thanks.
In this video, we're going to show you how to replace ignition coil. On these vehicles, they recommend you replace these coils at 100,000 miles. Also, sometimes if your engine runs a little rough and turns the "check engine" light on and you get a code that says, "Cylinder 1 or Cylinder 3 or something misfiring," that's usually a coil going bad. It is a pretty easy replacement. You'll need a ratchet extension with 8mm and 10mm sockets. If you don't have an 8mm socket, a flat blade screwdriver can help you get the clamps off as you'll see.
Working from the passenger side, you want to remove two bolts that hold the top of the air box: one here and one right here. Now to remove this, you want to remove this intake tube which is a clamp here and a clamp here. Remove that tube and then loosen both this one and this one to pull this apart. I'll speed this up a little bit. You can either use a flat blade screwdriver or an 8mm socket with a ratchet and extension to undo those clamps. This also has a small vacuum line on here. Twist and pull that off, and then this goes up, and there's also a line right back here. Just pull off of there.
This big vehicle has been sitting for a while, so I'm just using a vacuum cleaner to clean up the vacated mouse house that's sitting on the intake. Okay, then take, twist, and get this collar off here. You can see here are our five coils. Pick any one of them, and just remove the 10mm bolt. Each of them have a little gray clip that you just pull on. Use a screwdriver. There's a little tab right in the center. Push the tab down and pull the clip right off.
Then there's just a tab for your thumb. Press that. Remove the lead, remove this 10mm bolt, and then, once you have the bolt removed, just move it around, shake it up and down a little bit, and then the coil comes up and out.
The new coil from 1A Auto is exactly the same as the old one. Put it right down in. You want to just push it straight in. Tighten up the 10mm bolt. Plug your lead back in, and then put the locking tab back in place. Repeat that for any cylinders you need. The cylinder order on these is usually just from front to back: 1, 2, 3, 4 and 5. If you get a code like "number 3 cylinder misfiring," that's usually a bad coil, so you'd replace the number 3 coil.
To put it back together, put this on there. There's a little notch that should stick up right there. I've got my two bolts already kind of in there. Right here is that hose. Push that hose down first. Put this down in place. I'm just kind of maneuvering it into this hose here. Push it into place and twist this hose a little bit off. Push it down onto here. Get it good and tight on there. Hook up the vacuum hose. Use an 8mm socket to tighten up. Just inspect where the hoses go and their housings. Make sure they're nice and tight, and then tighten up our clamps. Again, you can use either a flat blade screwdriver or an 8mm socket. Then we go back to our 10mm socket and then tighten them up and you're all set.
We hope this video helps you out. Brought to you by www.1AAuto.com, your source for quality replacement parts and the best service on the Internet. Please feel free to call us toll-free, 888-844-3393. We're the company that's here for you on the Internet and in person.
ICA61531
In Stock
Product Reviews
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4.86/ 5.076
76 reviews
5 Stars
4 Stars
3 Stars
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1 Star
70
3
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Great
Darnelle
January 28, 2017
My truck is running like a new truck! I have ordered parts from here more than once
Ignition coils
Charles
April 24, 2017
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.
Gary
gary
June 28, 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.
Quality product
A
July 2, 2017
Quick shipping.. excellant Customer service.. product exactly as described.. definitely will shop again!
Made my truck run brand new
D
August 1, 2017
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.
Great Service
Edward
August 3, 2017
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.
GREAT
THAD
August 24, 2017
GREAT AND PLAN ON GETTING SOME FOR OTHER CAR ALSO .
L
November 21, 2017
The coils I bought from 1 A Auto was a perfect match. The were also much cheaper than an auto parts store.
Just what I needed
M
December 27, 2017
Exact match and easy to install. Product arrived quickly.
Fired Up !!
Quintun
January 29, 2018
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.
Great Purchase
M
February 5, 2018
My wifes car runs like it was new. I have recently started buying auto parts online and I don't know why I waited this long to do it. Thanks 1a auto.
Customer Satisfaction
Mark
February 5, 2018
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.
kenneth
March 12, 2018
Work real good took less a hour to install,solve half the problem ,no more misfiring,might have the timing checked,injectors ckeaned
Good
Anthony
March 16, 2018
Great price for 6 coils. Installed without an issue and work perfectly. Will be making more purchases from 1A Auto in the future.
S
March 28, 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 im so glad to know about this company
Love it
M
April 16, 2018
I love this site and I will be using it more often
Purchase of Coil packs
G
May 2, 2018
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 ...
P
May 21, 2018
I WAS VERY IMPRESSED WITH MY ORDER, VERY FRIENDLY COSTUMER SERVICE..I WAS SATISFIED WITH, THE WAY THEY HANDLE MY ORDER. I WOULD RECOMMEND MY FAMILY AND FRIENDS TO ORDER FROM A1AUTO..VERY FAST SERVICES AND DON'T TAKE LONG FOR YOUR ORDER TO ARRIVE.. THANKS FOR EVERY ONE THAT HELP WITH MY ORDER..
Worth every penny!
S
August 10, 2018
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
03 envoy coil packs
J
August 26, 2018
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 wasn't 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 can't say that my SUV runs any better, but I did see fuel mileage increase. Shipping was fast and free.... that's always nice too.
Ignition Coil
A
September 7, 2018
Im 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!!!
The best costumer service
Daniel
September 11, 2018
These guys are the best!! They solved my problem in no time.
Great product and perfect fit to tune up your Trailblazer
A
October 2, 2018
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!
Worked perfectly
Phil
October 26, 2018
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.
Good for the cost
satish
November 5, 2018
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.
Ignition Coils
Jason
November 7, 2018
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.
Satisfied customers
S
November 12, 2018
As you can see, i keep coming back to order with this company. They are amazing! Thanks again for the informative videos. Satisfied
Solved my problem.
B
November 20, 2018
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.
M? super trail blazer
J
November 23, 2018
this coil pack was affordable. made my trial blazing
Just what I needed
I
December 20, 2018
The coils were the right parts at the right price.
Delivery and packing were good also.
I'll buy again if and when I need to replace them.
Coil set
N
February 13, 2019
I love everything about this site. If I would have gone to the auto parts store I would have paid $65 to $70 each for one coil. Here I paid $122.95 for all six coils. My car runs great. This site saved me almost $270.
Parts
T
February 17, 2019
Great parts even better price fast delivery beat all competition by 100.00
A1 auto
Alicia
March 19, 2019
Love them good place to get your parts
Very satisfied
D
March 26, 2019
Fast delivery, correct parts, good experience! Would use again.
replacement parts
S
April 15, 2019
This 6 pc set of ignition coils was exactly what I needed for my Envoy, running smooth again after replacing the plugs and coil packs. Thanks again
Great company
A
May 5, 2019
Got a great price with fast delivery. And when I needed assistance both times I ordered, customer service was friendly and thorough.
2003 Trailblazer Coils
Ki Seh
May 6, 2019
As an independent woman, I try to work on my own vehicle as much as I can. I was a bit nervous of doing this work on my own, as it was my first attempt. The parts came and the video was incredibly helpful. My old beast is now purring like a kitten and I probably saved $500 or more by doing it myself. Thanks!!
Fast simple and easy
O
May 12, 2019
everything that I ordered came in fine one item did not show up so I made one phone call customer service is off the chain they are good.
J
June 22, 2019
Great product. Great price replaced all 6. Vehicle runs mint no problems better gas mileage would highly recommend thank you 1a auto
E
June 28, 2019
Great product and service
Excellent products and company
Jerry
July 6, 2019
I have ordered several parts from 1aauto and have always been very satisfied. This company provides excellent customer service unlike other online parts sellers. The coil pack and spark plugs solved my Envoy performance problem. Price is substantially below part store pricing. Thanks
coils
Dennis
July 7, 2019
only guessing ecm couldn't read problem wich cylinder your replacement coils fixed the problem. THANK YOU !
recent order
STEPHEN
July 10, 2019
I received all the parts very fast and everything fit perfectly. I am very pleased with this dealer and highly recommend them to everyone. Thank-you 1A Auto.
D
August 19, 2019
Perfect fit
Good Deal for 2005 Trailblazer EXT
Robert
August 21, 2019
I was pleasantly surprised with the quality of these coils. I could not tell the difference from the AC Delco other than the PRICE!!! I have had them installed for more than a month now and the vehicle is running great. I hope that they last as long as the originals because they lasted 196,000 miles.
Frank
September 5, 2019
Great service and great prices
ignition coils
Timothy
September 16, 2019
The price for a six pack was what some parts stores wanted to charge me for one; for the same part! Excellent price, the parts fit like a glove and work properly. The ordering was easy to find the parts- ignition coils-for my trailblazer. They came a day earlier which was great, packed safely as well. Overall, great service.
Plugs and Coils
Jim
November 4, 2019
One coil went bad on an 05 Envoy w/127000 miles, so l decided to change all plugs and coils. The product arrived quickly. Only time will tell, but it's been three weeks and all is well.
Replacement coils. Work great!
shelli
November 14, 2019
I had purchased a cheap set of coils to replace my oem ones..three of those after market coils failed within 4 months of install..ordered the trq coils from 1a to replace the replacements and so far...so good...no wierd wonky messages from my pcm now!!!! And engine runsuch smoother than it did.
very happy
B
December 14, 2019
I needed this product because I was going 200 miles one way and it came in time. thank you!!!
Very good product
Jorge
March 8, 2020
Very good product
Perfect and affordable
Daniel
March 25, 2020
I was able to replace all 6 coils for the price of 2 from a local store, they seem like they're very good quality and my vehicle runs smoother than it ever has. Well worth the price
M
May 5, 2020
Great price beat auto zone and advance by a long shot. Delivered on time and great quality
Would not purchase again
S
May 18, 2020
1 damaged, 1 dead
ignition coils have a bolt that is built into them. One of the six the bolt was bent and unable to be installed. A second one was completely dead and would not work at all.
S
August 12, 2020
2 of the 6 coils received were defective - i had to replace the spark plugs and then put my old coils on - i tried calling 1A but was on hold forever - went to return online but it was not the whole part, I am extremely busy right now so very inconvenient :( wish the packers would have checked the parts when putting them in the box as the sleeves were so loose
Daniel
September 24, 2020
works great
Great!
C
January 30, 2021
04 trailblazer 177,000 started missing bad and I just changed plugs a month ago. Pulled codes, which said misfire. Bought these took about an hour to do whole job, easy youtube videos. Been running about a week and my car runs better with these coils than the stocks ever did. More responsive and smoother idle. Hopefully they last. Would recommend!
Perfect Fit! Top notch quality!
Edward
March 22, 2021
With these new coil packs my GMC Envoy now runs like the day it rolled off the assembly line! Highly recommend these coil packs! Easy install.
No more misfires
Anna
December 10, 2021
I love it. No more misfires, no sluggish take off. Save money on gas! Thanks 1A- Auto Parts
Volvo xc70 2004 engine sputter & hard to start.
Lawrence
August 11, 2022
Engine ram rough and hard to start.
The code read 1 bad ignition coil but
I replaced them all since the car had 150k miles & i didnt want to do it all again in a month...
This was an easy install.. it helps access to a shop but not necessary. Just find a video on line..
While your in there... Make sure you check & clean or replace your plugs..
04 trailblazer
William
October 20, 2022
Got up Sunday and went to work, removed all the old parts and installed all the new , havent did a job like that in awhile but the parts fit great and my 2004 Trailblazer runs like new !
1A Auto to the rescue again
Angelo
October 27, 2022
The parts worked perfectly, vehicles running as good as new!
Ronald
January 30, 2023
Works nicely
Satisfied1
Dexter
February 23, 2023
great service great product! On time delivery I would recommend This product!
Kick Ass Product!!
Frankie
March 13, 2023
I just put these in this morning. Trust I am not a stupid bot. They work perfectly all 6. This is a GREAT buy. Lights not blinking anymore. Very happy here.
Ziqutan
April 6, 2023
They works great motor running better than ever??
Leary
David
July 15, 2023
So far they are working better than oem. Seeming to have better fuel mileage, and if you have a trailblazer you know that's big.
Orlonda
August 14, 2023
Great ??
Great price on an amazing product .
Jorge
October 16, 2023
Great product . My friend recommended these after using em on his Envoy . My Trailblazer is performing like new now . Amazing deal , highly recommend this brand .
Good Easy Fix
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Daniel
November 6, 2023
I liked that they were well made and work as intended.
Coils for 2004 GMC Envoy XL
Jeffrey
November 11, 2023
They fit and they work.
Antron
January 30, 2024
Great product and arrived fast!!
Awesome Job!
Stephen
August 19, 2024
The company went over and beyond to help me. The parts were supposedly delivered by the carrier but they did not arrive at my home. I called A1 and they shipped replacement parts (at no expense to me). The original shipment arrived the next day. I called A1 and reported this but they had already sent replacement parts. A1 is a first class operation.
Practical
Russell
August 26, 2024
Works perfect, easy install at a reasonable price.
Great place for all your parts!
Patrick
September 11, 2024
Works great on my wife's car. I order all my parts through 1Aauto.com. great parts, great prices and quick free shipping
Awesome
Brian
October 26, 2024
Parts were a direct replacement for my 2005 trailblazer that was idling rough and accelerating sluggish also mis firing. These along with new plugs it runs like new again. I watch 1a auto videos for all my auto repair needs. Will be buying from them in the future
Customer Q&A
Who is the manufacturer?August 29, 2016
Gary W
10
Generic no name but I haven't had any problems with it still running strong almost 3 years
August 29, 2016
Nina N
10
1A Auto
August 30, 2016
Andre J
10
Do not see any markings on the part - the box references Vendor #V0193, so maybe you can ask 1A Auto's customer service to look it up? Sorry I couldn't be of more help.
August 30, 2016
Lynn H
10
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 don't hesitate to ask.
August 30, 2016
Brian F
10
i will try and locate some info this weekend at the moment i don't know
August 30, 2016
Richard C
10
Not sure...i no longer own the truck...
August 31, 2016
Demetrius A
Do I still have to buy the spark plugs?May 24, 2021
Ray A
10
The spark plugs are not included with this set.
May 24, 2021
Cristina P
Customer service
877-844-3393
Monday - Friday 8:00am - 9:30pm ET Saturday - Sunday 8:00am - 4:30pm ET
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