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THREE TIERS OF A PREMIUM PORTFOLIO
GM ORIGINAL EQUIPMENT
GM Genuine Parts and ACDelco Original Equipment are the true OE parts installed during production or validated by General Motors for GM vehicles. These maintenance, repair, powertrain and collision components are designed and engineered to meet rigorous standards set by General Motors.
GOLD
ACDelco Gold parts are the high-quality alternative to OE parts. These parts are manufactured to meet expectations for fit, form and function, making them a smart choice for General Motors vehicles and many makes and models, including special applications.
SILVER
ACDelco Silver parts are high-quality, high-value options for General Motors vehicles, as well as for most makes and models.
OUR HISTORY – OUR ROOTS EMPOWER US
ACDelco has been at the forefront of automotive innovation since the birth of GM in 1908. Since then, we’ve helped a woman fly around the world and a man traverse the surface of the moon.
However, our history isn’t half as promising as our future. We continue forward with GM Genuine Parts by our side. From the assembly line to the finish line, we’re building innovation and improvement on a foundation of GM Original Equipment.
GM Genuine Parts and ACDelco are proud to work together as the only source for true General Motors Original Equipment and aftermarket parts – past, present and future.
Mama
Reviewed in the United States on May 4, 2025
Great an easy to work with
Mike Freeman
Reviewed in the United States on January 26, 2025
They work? I mean what else do you say. Price was a good value.
Ibrahim Ortiz
Reviewed in the United States on January 21, 2025
Go with the best ac delco, works well in my hummer h3
Eduardo b.
Reviewed in Mexico on September 23, 2024
Me alegro que todo haya salido bien
Azar
Reviewed in the United States on June 4, 2024
The ACDelco 41-103 Professional Iridium Spark Plug offers exceptional performance and durability, making it a top choice for any vehicle. With its iridium construction, these plugs provide superior ignition and longevity, ensuring consistent engine power and efficiency. The six-pack option not only offers great value but also ensures you have spares on hand whenever needed. Easy to install and compatible with a wide range of vehicles, these spark plugs deliver reliable starts and smooth engine operation. Invest in the ACDelco 41-103 and experience the difference in your vehicle's performance firsthand.
WILLIE M CRAWLEY JR
Reviewed in the United States on March 12, 2024
I have always used the recommended brand for the vehicle and AC Delco is the brand for Chevrolet, Buick, and GMC vehicles that give you quality, durable, and longer lasting plugs.
Heidi Decarpenterie
Reviewed in the United States on December 6, 2024
Worked great!
Paul Marrero
Reviewed in the United States on October 15, 2024
The photo used is the original spark plug that came out of the truck for reference of how to assure your oem spark gap and acdelco oem number/code match. OEM fit for 2004 chevy colorado 4x4 z71 5.3l 5cylinder. Same as/match to the ones taken out - same acedelco oem numbers on label. Spark gap checked to oem gap.040 and refined in 3 spark plugs slightly placed off during shipping of package. Spark gap Guage as seen in photo is recommended in every spark plug placement at receiving of part and right before placement. If gap is not properly balanced in the cylinders it could cause loss/ potential power issues and also a Christmas light on the dash board/obd2 code. Recommended part with purchase if you don't have one already is a spark plug gap Guage. It is a general practice to every spark plug placement you can find one simply at your local Walmart for a fair price or order online. Auto part stores such as autozone, oriellys, and advance auto parts usually sell them a little more expensive. Best of luck and - God Bless
jellybean5922
Reviewed in the United States on April 28, 2023
Bought these ACDelco 4#41-103 spark plugs for 2007 hummer h3. With 3.7L. These are a really good plug to buy for motors with higher mileage. You only need 5 of the plugs, cause its 5 cylinder engine. So you have a extra plug left.. takes a 5/8 deep socket. Make sure when putting new plugs in not to cross thread or tighten to tight.. also they are already pre-gapped.
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