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Lowest Price GuaranteeSpark Plug1987-1989 Buick Century/Skyhawk & Oldsmobile Cutlass Ciera/Cutlass Cruiser; 1987-1988 Cadillac Cimarron & Oldsmobile Firenza Hex Size: 15.88 MM Sold Individually
ACDelco R44LTSM 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 R44LTSM 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 R44LTSM Fitment:
- 1987-1989 Buick Century/Skyhawk & Oldsmobile Cutlass Ciera/Cutlass Cruiser
- 1987-1988 Cadillac Cimarron & Oldsmobile Firenza
- 1987-1993 Chevy Beretta/Corsica
- 1987-1994 Chevy Cavalier
- 1987-1990 Chevy Celebrity
- 1987-1991 Pontiac 6000/Tempest
- 1988-1993 Buick Regal & Oldsmobile Cutlass Supreme & Pontiac Grand Prix
- 1990-1994 Chevy Lumina
- 1991-1994 Pontiac Sunbird
- 1993 Buick Century & Oldsmobile Cutlass Ciera
- 1997 Chevy Cavalier & Isuzu Hombre & Pontiac Sunfire
- 1999-2002 Chevy Camaro & Pontiac Firebird
- 1999-2010 Chevy Corvette/Silverado 1500 & GMC Sierra 1500
- 1999-2004 Chevy Silverado 2500 & GMC Sierra 2500
- 2000-2010 Chevy Suburban 1500/Suburban 2500/Tahoe & GMC Yukon/Yukon XL 1500/Yukon XL 2500
- 2001-2003 Chevy Silverado 1500 HD & GMC Sierra 1500 HD
- 2001-2010 Chevy Silverado 2500 HD & GMC Sierra 2500 HD
- 2001-2006 Chevy Silverado 3500 & GMC Sierra 3500
- 2001-2004 Avanti II
- 2002-2010 Cadillac Escalade/Escalade EXT
- 2002-2006 Chevy Avalanche 1500
- 2003-2006 Chevy SSR/Trailblazer EXT & GMC Envoy XL & Isuzu Ascender
- 2003-2010 Cadillac Escalade ESV & Chevy Express 1500/Express 2500/Express 3500 & GMC Savana 1500/Savana 2500/Savana 3500
- 2003-2009 Hummer H2
- 2004-2007 Buick Rainier & Cadillac CTS
- 2004-2005 GMC Envoy XUV & Workhorse FasTrack FT1061/FasTrack FT1461/FasTrack FT1601/FasTrack FT1801
- 2004-2006 Pontiac GTO
- 2005-2006 Chevy Silverado 1500 HD & GMC Sierra 1500 HD
- 2005-2009 GMC Envoy & Saab 9-7x
- 2005-2008 Pontiac Grand Prix
- 2005 Workhorse FasTrack FT1261
- 2006-2009 Chevy Impala/Trailblazer
- 2006-2007 Chevy Monte Carlo
- 2007-2010 Chevy Avalanche/Silverado 3500 HD & GMC Sierra 3500 HD
- 2008-2009 Buick Allure/LaCrosse & Pontiac G8
- 2008-2010 Hummer H3
- 2009-2010 Cadillac CTS & Chevy Colorado/Express 4500 & GMC Canyon/Savana 4500 & Hummer H3T
- 2010 Chevy Camaro
ACDelco R44LTSM Notes:
- Verify vehicle application, position, and system configuration before installation.
Part TypeSpark Plug
BrandACDELCO
Package Height1.0
Package Width2.45
Package Length5.7
Weight0.055 PG
Hex TypeHex
Gap Size (Mm)1.12
Ground ConfigurationStandard
Center Electrode Core MaterialCopper
Reach (Mm)17.25
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.
Thread Diameter0.551 in (14 mm)
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.
Pack Of1
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.
Product DescriptionACDelco GM Original Equipment Conventional Spark Plugs are designed, engineered, and tested to rigorous standards, and are backed by General Motors. These Conventional Spark Plugs are designed for reliability and efficient performance, and are a high quality replacement for many vehicles on the road today. Their high-quality copper cores and outstanding suppression characteristics deliver reliable performance. They are also available for Marine applications. These premium aftermarket replacement spark plugs are manufactured to meet your expectations for fit, form, and function. ACDelco GM Original Equipment parts are the true OE parts installed during the production of 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
Center Electrode DesignStandard
Width (In)3.5
Thread SizeM14 - 1.25
Insulator Height (Mm)51.46
Thread Diameter (Mm)14
Resistance2-12k ohms
Thread Diameter (In)0.55
Gap Size0.044 in (1.118 mm)
Length (In)4.1
Insulator MaterialES703
Resistor PlugYes
Part CategoryReplacement Parts
Pre-Gap Size0.04
Programming RequiredNo
Ground Electrode Quantity1
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 6Some ACDelco GM Original Equipment parts may have formerly appeared as GM Genuine Parts (OE) or ACDelco Professional
Washer(S) IncludedNo
Seat TypeTapered
Features &#38; Benefits - Bullet 7ACDelco GM Original Equipment parts are designed, engineered and tested to rigorous standards, and are backed by General Motors
Features &#38; Benefits - Bullet 8GM Engineers design and validate OE parts specifically for your Chevrolet, Buick, GMC, or Cadillac vehicle
Insulator Height51.46
Center Electrode Tip MaterialNickel Alloy
Ground Electrode Core MaterialNickel
Features &#38; Benefits - Bullet 2Copper core provides great heat transfer and helps maximize plug durability
Features &#38; Benefits - Bullet 3Ribbed suppressor seal extends resistance and helps prevent spark 'flash over' and misfires
Resistor TypeYes
Features &#38; Benefits - Bullet 4Nickel-chrome alloy sheathing helps prevent corrosion on center electrode
Features &#38; Benefits - Bullet 5Available for use in Marine applications
Manufacturer Heat Range4
Features &#38; Benefits - Bullet 1Black Onyx coating helps reduce corrosion
Reach0.68
Ground Electrode Tip DesignStandard
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)1.1
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)0.4
Grade TypeOE
Faq - Question 2Should I change all of my vehicle’s spark plugs at the same time?
Hex Size15.88 MM
Faq - Question 1Is there a recommended interval for changing my vehicle’s spark plugs?
Vendor Part NumberR44LTSM
Package Qty1
Package TypeEA
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