Order Status & Returns
Gift Cards
Help Center
1-800-345-4545
Product Discontinued
Currently Unavailable
This product is no longer available. Please call customer service for assistance at 1-800-345-4545.
- Platinum Spark Plug
Part TypeSpark Plug
BrandACDELCO
Package Height1.0
Package Width3.6
Package Length6.6
Weight0.72 PG
Hex TypeHex
Gap Size (Mm)1.02
Ground ConfigurationStandard
Good Maintenance Practices - Section 1 - Bullet 1Grasp the spark plug boot and gently rotate it 90 degrees counterclockwise. Pull the spark plug boot and cable away from the spark plug. If necessary, use a spark plug boot removing tool. DO NOT grab or violently pull spark plug cables
Reach (Mm)23.00
Good Maintenance Practices - Section 1 - Bullet 4Remove each spark plug and place each one in a tray by cylinder number. This will help identify and relate any unusual condition to the cylinder involved.
Good Maintenance Practices - Section 1 - Bullet 5Apply dielectric grease into the boot area to reduce the chance of exterior tracking on the buttress tower of the spark plug. This grease also promotes a good heat transfer between the spark terminal screw and boot terminal.
Good Maintenance Practices - Section 1 - Bullet 2Brush or air blast dirt away from the well areas before removing spark plugs. CAUTION: Use goggles to protect eyes from debris when applying compressed air to spark plug wells.
Good Maintenance Practices - Section 1 - Bullet 3Use the correct deep socket size to loosen each spark plug one or two turns. NOTE: To remove spark plugs from aluminum heads, allow the engine to cool. The heat of the engine, in combination with a spark plug that is still hot, may cause the spark plug threads to strip the cylinder head upon removal.
Approximate Resistor Value4-6k ohms
Ground Electrode Tip MaterialPlatinum
Product DescriptionACDelco GM Original Equipment Double Platinum Spark Plugs are designed, engineered, and tested to rigorous standards, and are backed by General Motors. With a copper core and double platinum pads on the center electrode, these plugs are designed to deliver long-lasting performance. ACDelco GM Original Equipment parts are the true OE parts installed during the production or validated by General Motors for GM vehicles. Some ACDelco GM Original Equipment parts may have formerly appeared as GM Genuine Parts (OE) or ACDelco Professional. ⚠<b> WARNING:</b> Cancer and Reproductive Harm - www.P65Warnings.ca.gov
Pack Of1
Center Electrode Core MaterialCopper
Center Electrode DesignStandard
Insulator Height (Mm)23
Thread SizeM14 - 1.25
Gap Size0.04 in (1.016 mm)
Thread Diameter (Mm)14
Resistor PlugYes
Thread Diameter (In)0.55
Insulator MaterialAluminum Oxide
Part CategoryReplacement Parts
Pre-Gap Size1.02
Programming RequiredNo
Ground Electrode Quantity1
Approximate Resistor Value (K Ohms)4-6k ohms
Signs Of Wear &#38; Troubleshooting - Section 1 - Bullet 1Your engine having trouble starting, hesitating, or cutting out
Faq - Answer 8Yes, ACDelco has marine spark plugs for many applications.
Signs Of Wear &#38; Troubleshooting - Section 1 - HeaderSigns of wear for spark plugs include but are not limited to:
Faq - Answer 7No, cleaning your old spark plugs is not recommended. Dirty, fouled spark plugs may also have broken or chipped insulator tips, worn electrodes, or worn or missing side wires. These conditions severely affect spark plug performance. Replace your dirty, fouled spark plugs with new ACDelco spark plugs.
Faq - Answer 6Yes, pre-ignition can cause serious damage to your engine. Pre-ignition is the ignition of fuel before the actual spark occurs, which causes a rapid temperature rise in the combustion chamber that can damage engine components and melt spark plug electrodes. Causes of pre-ignition include but are not limited to a buildup of deposits that can become incandescent in the combustion chamber, improper installation torque being applied to spark plugs, and having spark plugs with a heat range that is too hot for the engine’s operating condition.
Faq - Answer 5Not always, but you should inspect your spark plug wires for wear when replacing your spark plugs. Refer to your vehicle owner’s manual or contact the manufacturer for more information.
Faq - Answer 4Yes. When ACDelco spark plugs are manufactured, they are pre-gapped to the correct gap specification.
Faq - Answer 3Yes. Diesel engines require glow plugs because diesel engines operate differently than gas engines. ACDelco Professional Glow Plugs are specially designed to give diesel engines the heat they need for their cold starts. Refer to your owner’s manual or contact your vehicle’s manufacturer for more information.
Faq - Answer 2Yes, if it is the scheduled time for spark plug replacement. It is okay to replace one spark plug if it is fouled or damaged prior to scheduled maintenance, provided the source of the damage is found and corrected.
Hex Size (In)5/8
Faq - Answer 1Yes, this interval depends on what type of spark plug your vehicle requires. Refer to your owner’s manual or contact your vehicle’s manufacturer for more information.
Features &#38; Benefits - Bullet 6GM Engineers design and validate OE parts specifically for your Chevrolet, Buick, GMC, or Cadillac vehicle
Washer(S) IncludedNo
Seat TypeTapered
Features &#38; Benefits - Bullet 7GM regularly updates production and service part designs to integrate new materials and technologies
Insulator Height52.4
Center Electrode Tip MaterialIridium
Ground Electrode Core MaterialNickel Alloy
Features &#38; Benefits - Bullet 2Double platinum point pad on center and ground electrode offer excellent durability and consistent voltage demands to help reduce wear on ignition system
Features &#38; Benefits - Bullet 3Pure copper core results in cooler electrode temperature for maximized durability and fouling resistance
Resistor TypeYes
Features &#38; Benefits - Bullet 4Some ACDelco GM Original Equipment parts may have formerly appeared as GM Genuine Parts (OE) or ACDelco Professional
Features &#38; Benefits - Bullet 5ACDelco GM Original Equipment parts are designed, engineered and tested to rigorous standards, and are backed by General Motors
Manufacturer Heat Range22
Features &#38; Benefits - Bullet 1One-piece, fired-in suppressor seal blends three glass types for a gas-tight seal that helps reduce radio frequency and engine interference, regulate spark plug energy, and protect against compression pressures for long life
Reach17.5
Ground Electrode Tip DesignStandard
Good Maintenance Practices - Section 1 - HeaderVisually inspect spark plugs for signs of wear. Follow these steps for removing spark plugs for inspection, servicing or replacement:
Good Maintenance Practices - Section 1 - Bullet 6Before installing new spark plugs, use a gap guide to make sure your new spark plugs have the correct gap. NOTE: ACDelco GM OE Iridium Spark Plugs are pre-gapped during manufacturing. Never attempt to gap an ACDelco GM OE Iridium Spark Plug. You could damage the spark plug. Replace any incorrectly gapped ACDelco GM OE Iridium Spark Plugs with plugs that are correctly gapped.
Good Maintenance Practices - Section 1 - Bullet 7Install spark plugs or glow plugs to the proper torque per the manufacturers’ specification.
Faq - Question 8Does ACDelco have marine spark plugs?
Faq - Question 7Can I just clean my spark plugs instead of replacing them?
Faq - Question 6What is pre-ignition and can it damage my engine?
Faq - Question 5When I replace my spark plugs, should I also replace my spark plug wires?
Signs Of Wear &#38; Troubleshooting - Section 1 - Bullet 2Lack of acceleration or loss of speed when driving uphill under load
Signs Of Wear &#38; Troubleshooting - Section 1 - Bullet 3Cracks in the upper or lower portion of the spark plug insulator
Signs Of Wear &#38; Troubleshooting - Section 1 - Bullet 4Chipped or broken insulator tips
Signs Of Wear &#38; Troubleshooting - Section 1 - Bullet 5Damaged spark plug boots
Part FitmentDirect Fit
Faq - Question 4Are ACDelco spark plugs pre-gapped?
Faq - Question 3Does a diesel engine require a different type of plug than a gas engine?
Grade TypeOE
Faq - Question 2Should I change all of my vehicle’s spark plugs at the same time?
Hex Size16 MM
Faq - Question 1Is there a recommended interval for changing my vehicle’s spark plugs?
Vendor Part Number41-991
Package Qty1
Package TypeEA
No Questions
No Reviews
ITEM YOU MAY ALSO CONSIDER
Some parts are not legal for use in California or other states with similar laws / regulations
