Plug Set 41-156 41-993 41-114 41-110 41-101 41-103 for Buick & more | for Buick Chevrolet Cadillac GMC Hummer

Key Features

• Iridium Electrode — Each plug uses an iraurita (iridium alloy) electrode that delivers a strong, consistent spark for reliable ignition.
• Multi-Fit OEM Numbers — The set covers OEM part numbers 41-156, 41-993, 41-114, 41-110, 41-101, 41-103, 41-109, and 41-108 for a wide range of GM vehicles.
• Direct Interchange — These plugs are a direct interchange for OEM part number 12620540, simplifying replacement.
• Flat Mounting Base — A flat mounting base helps ensure a secure fit in the cylinder head.
• 8-Piece Set — The 8-piece set covers a full engine replacement in one purchase.

Product Specifications

• Material: Iraurita (iridium alloy)
• Condition: New
• Mounting Base: Flat
• Interchange Part Number: 12620540
• Package: Bubble bags + inner box + outer carton

What It Is / How It Works

This set of 8 iridium spark plugs covers multiple OEM part numbers including 41-156, 41-993, 41-114, 41-110, 41-101, 41-103, 41-109, and 41-108. It is designed for a wide range of vehicles from Buick, Chevrolet, Cadillac, GMC, and Hummer. Each plug is built with an iridium electrode for reliable ignition and long service life.

Who It's For / Use Cases

Spark plug sets like this suit DIY car owners replacing worn plugs on their Buick, Chevrolet, Cadillac, GMC, or Hummer. Mechanics and garages needing a multi-fit set for common GM engines will find the coverage useful. Vehicle enthusiasts performing routine maintenance can keep their engine running at peak efficiency.

How to Use / Care

1. These plugs are a direct replacement for OEM part number 12620540 and come ready to install in compatible engines.
2. Check your engine requirements against the OEM numbers 41-156, 41-993, 41-114, 41-110, 41-101, 41-103, 41-109, or 41-108.
3. The spark plugs are new, but check the gap with a gapping tool before installation to match your vehicle's specifications.

How to Choose

Match the OEM part numbers in the Product Specifications to your engine's requirements before ordering. Confirm the electrode material and set quantity fit your maintenance plan. For multi-vehicle owners, a set covering several OEM numbers reduces the need for separate purchases.

Frequently Asked Questions

Will these spark plugs fit my 2015 Chevrolet Tahoe?
These plugs are compatible with many GM vehicles including the Chevrolet Tahoe. Check your engine requirements against the OEM numbers 41-156, 41-993, 41-114, 41-110, 41-101, 41-103, 41-109, or 41-108.

How many spark plugs come in this set?
This set includes 8 spark plugs, enough for a complete replacement on most V8 engines or a full set for four- and six-cylinder engines.

Can I use these plugs in a Cadillac Escalade?
These plugs are listed for Cadillac vehicles and cover multiple OEM part numbers including 41-110 and 41-108, which are commonly used in Escalade models.

What is the electrode material made of?
The electrode is made of iraurita, an iridium alloy that provides long-lasting performance and consistent spark output.