Order Status & Returns
Gift Cards
Help Center
1-800-345-4545
Vehicle Info Needed
Lowest Price GuaranteeSpark Plug1968-1971 Jeep J-100/Wagoneer; 1969-1971 Jeep J-2500/J-2600/J-3800; 1969-1970 Jeep J-2700/J-3500/J-3600/J-3700 Center Electrode Core Material: Copper Sold Individually
ACDelco 41-905 Spark Plug is designed as an application-specific service replacement that supports proper fit, function, and system integration. Delivers the ignition spark required to initiate combustion in the engine cylinder. Verify vehicle fitment and system configuration before installation.
ACDelco 41-905 Features:
- Application-specific heat range, reach, and terminal configuration should be matched to the specified vehicle application
- Application-specific replacement spark plug for compatible engines
ACDelco 41-905 Fitment:
- 1968-1971 Jeep J-100/Wagoneer
- 1969-1971 Jeep J-2500/J-2600/J-3800
- 1969-1970 Jeep J-2700/J-3500/J-3600/J-3700
- 1970-1974 Checker A11/A11E/Taxicab & Chevy Blazer/C10 Suburban/C20 Suburban & Pontiac Firebird/LeMans
- 1970 Checker Deluxe & Chevy Bel Air/Biscayne/C10 Pickup/C20 Pickup/C30 Pickup/C50/Camaro/Chevelle/El Camino/Estate/G10 Van/G20 Van/G30 Van/Impala/K10 Pickup/K10 Suburban/K20 Pickup/K20 Suburban/K30 Pickup/Nova/P20 Van/P30 Van & GMC C15/C1500 Pickup/C15/C1500 Suburban/C25/C2500 Pickup/C25/C2500 Suburban/C35/C3500 Pickup/G15/G1500 Van/G25/G2500 Van/G35/G3500 Van/Jimmy/K15/K1500 Pickup/K15/K1500 Suburban/K25/K2500 Pickup/K25/K2500 Suburban/K35/K3500 Pickup/P15/P1500 Van/P25/P2500 Van/P35/P3500 Van & Jeep J-4500/J-4600/J-4700 & Pontiac Parisienne/Tempest
- 1970-1981 Checker Marathon
- 1970-1972 Chevy Brookwood
- 1970-1971 Oldsmobile Cutlass/F85 & Pontiac Acadian
- 1971-1977 Pontiac Ventura
- 1971 Mercury Cyclone
- 1972-1974 Chevy C10 Pickup/C20 Pickup/C30 Pickup/C50/Caprice/El Camino/G10 Van/G20 Van/G30 Van/Impala/K10 Pickup/K10 Suburban/K20 Pickup/K20 Suburban/K30 Pickup & GMC C15/C1500 Pickup/C15/C1500 Suburban/C25/C2500 Pickup/C25/C2500 Suburban/C35/C3500 Pickup/G15/G1500 Van/G25/G2500 Van/G35/G3500 Van/Jimmy/K15/K1500 Pickup/K15/K1500 Suburban/K25/K2500 Pickup/K25/K2500 Suburban/K35/K3500 Pickup/Sprint & Stutz Blackhawk
- 1972 Chevy Biscayne & Pontiac Bonneville
- 1972-1977 Chevy Chevelle
- 1972-1973 Chevy Bel Air & Pontiac GTO
- 1972-1979 Chevy Camaro/Nova
- 1972-1975 Pontiac Grand Safari/Grandville
- 1973-1974 Chevy P10 Van/P20 Van/P30 Van & GMC P15/P1500 Van/P25/P2500 Van/P35/P3500 Van
- 1973-1976 Oldsmobile Omega
- 1973 Pontiac Grand Am/Parisienne
- 1974 Ford Country Sedan/Country Squire/Ranch Wagon & Mercury Colony Park
- 1974-1983 Ford LTD
- 1974-1975 Ford Custom 500
- 1974-1976 Ford Gran Torino & Lincoln Mark IV
- 1974-1979 Ford Ranchero
- 1974-1980 Lincoln Continental
- 1974-1985 Mercury Cougar
- 1974-1982 Mercury Marquis
- 1975-1980 Dodge B100/B200/B300/D200/Ramcharger/W200 & Plymouth PB100/Trailduster
- 1975-1979 Dodge D100
- 1975-1978 Dodge D300/W300 & Plymouth Fury/PB200
- 1975-1977 Dodge W100
- 1975 Buick Apollo & Dodge CB300
- 1975-1976 Dodge Coronet/Dart & Ford Elite/Torino & Mercury Montego & Plymouth Duster/Scamp/Valiant
- 1975-1985 Ford Thunderbird & Mercury Grand Marquis
- 1976-1980 Chevy C10 Suburban & Dodge Aspen & Mercury Monarch & Plymouth Volare
- 1976 Chevy G20/G30/K20/P30 & Dodge Charger & Ford Bronco/F-100/F150/F350 & GMC K25 & Oldsmobile Cutlass/Cutlass Supreme & Pontiac Firebird
- 1976-1982 Chevy K5 Blazer
- 1976-1984 Chevy C10/C20/G10/K10
- 1976-1979 Chevy El Camino
- 1976-1978 Ford Mustang II & GMC G15/K15/K15 Suburban
- 1976-1977 Ford Maverick & GMC Sprint & Mercury Comet
- 1976-1981 Pontiac Grand LeMans
- 1977-1987 Dodge D150
- 1977-1979 Chevy Impala & Dodge CB300 & Ford LTD II & Lincoln Mark V & Pontiac Catalina/LeMans
- 1977-1978 Dodge Monaco & GMC C25
- 1977-1985 Chevy Caprice
- 1977-1980 Chevy K10 Suburban & Lincoln Versailles
- 1977 Ford Custom 500 & Pontiac Sunbird
- 1977-1981 Ford Granada
- 1978-1981 Chrysler LeBaron/Town & Country
- 1978-1987 Dodge W150
- 1978-1983 Dodge Diplomat & Plymouth Caravelle
- 1978-1979 Buick Regal & Chevy G30/Malibu/Monte Carlo/Monza & Ford Fairmont & GMC Caballero & Mercury Zephyr
- 1978-1980 Chevy C30/K20
- 1978 GMC C35/G35/K25
- 1979-1981 Chrysler Newport & Dodge St. Regis
- 1979-1984 Chevy G20 & GMC C1500/C2500/G1500/G2500/K1500
- 1979 Chevy P30 & GMC G3500 & Mercury Capri & Pontiac Grand Am
- 1979-1980 GMC C1500 Suburban/C3500/K1500 Suburban
- 1980-1983 Chrysler Cordoba & Dodge Mirada & Lincoln Mark VI & Plymouth Gran Fury
- 1980 Ford Bronco/E-100 Econoline/E-100 Econoline Club Wagon/F250/F350 & GMC K2500 & Plymouth PB200
- 1980-1982 Ford E-350 Econoline/E-350 Econoline Club Wagon
- 1981-1987 Dodge B150/B250/D250
- 1981-1983 Plymouth PB150/PB250
- 1981-1984 Chevy G30
- 1981-1982 Ford Fairmont/Mustang & Mercury Capri/Zephyr & Pontiac Grand Prix
- 1981-1985 Lincoln Town Car
- 1982 Chevy Impala & Chrysler New Yorker & Ford E-250 Econoline Club Wagon/F250/F350 & Oldsmobile Cutlass Cruiser
- 1982-1984 GMC G3500
- 1982-1985 Lincoln Continental
- 1983 Chrysler Fifth Avenue
- 1984-1987 Dodge W100
- 1984-1985 Lincoln Mark VII
- 1985-1987 Dodge D100
- 1985 Ford LTD & Oldsmobile Delta 88
- 1986-1987 Pontiac Grand Prix
- 1991-1992 Cadillac Brougham
- 1993 Cadillac Commercial Chassis/Fleetwood
ACDelco 41-905 Notes:
- Verify vehicle application, position, and system configuration before installation.
Part TypeSpark Plug
BrandACDELCO
Package Height1.0
Package Width1.1
Package Length3.4
Weight0.1 PG
Hex TypeHex
Gap Size (Mm)0.89
Ground ConfigurationStandard
Center Electrode Core MaterialCopper
Reach (Mm)10.95
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
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.
Approximate Resistor Value2.5-12k ohms
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.
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
Gap Size0.035 in (0.889 mm)
Pack Of1
Center Electrode DesignStandard
Width (In)3.59
Thread SizeM14 - 1.25
Thread Diameter (Mm)14.0
Hex Size0.625 in (15.875 mm)
SkirtNo
Length (In)4.19
Core Nose Length0.812
Part CategoryReplacement Parts
Pre-Gap Size0.035
Programming RequiredNo
Ground Electrode Quantity1
Approximate Resistor Value (K Ohms)3-10k ohms
Indicated Mean Effective Pressure (Imep)180
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.
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 Height62.738
Center Electrode Tip MaterialPlatinum
Ground Electrode Core MaterialNickel
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
IndexedNo
Manufacturer Heat Range17
Hex Size (Mm)16
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
Reach11.2
Ground Electrode Tip DesignPlatinum
Electrical Terminal TypeNon-Removable Nut
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?
Height (In)1.09
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?
Weight (Lb)0.32
Grade TypeOE
Faq - Question 2Should I change all of my vehicle’s spark plugs at the same time?
Faq - Question 1Is there a recommended interval for changing my vehicle’s spark plugs?
Vendor Part Number41-905
Package Qty1
Package TypeEA
No Questions
No Reviews
Items You Need
ITEM YOU MAY ALSO CONSIDER
Some parts are not legal for use in California or other states with similar laws / regulations
