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Spark Plugs - GM Genuine Parts

GM Parts PRODUCT FACTS

Find out more about the ACDelco Professional Platinum Spark Plug and how it fits into the Starting and Charging System with the product facts below.

Function:

Uses a high-voltage spark from the ignition coil to ignite the air/fuel mixture inside the engine’s cylinders.

Signs Of Wear & Troubleshooting:

Signs that your spark plugs need to be replaced:

  • Engine has trouble starting, hesitates or cuts out.
  • Sluggish engine performance, loss of engine power or decreased fuel economy.
  • Lack of acceleration or loss of speed when driving uphill.
  • Cracks in the upper or lower portion of the spark plug insulator.
  • Chipped or broken insulator tip.
  • Damaged spark plug boot.

 

What It Does:

The Starting and Charging System starts the engine, maintains the battery’s charge and provides power to the electrical accessories while the engine is running.

Good Maintenance Practices:

It is important to inspect spark plugs at regular intervals for signs of deterioration. Follow these steps for removing spark plugs for inspection, servicing or replacement:

  • Grasp 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.
  • Use 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.
  • Brush or air-blast dirt away from the well areas before removing spark plugs. CAUTION: Use goggles to protect eyes from dirt when applying compressed air to spark plug wells.
  • Remove 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.
  • Apply 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.
  • Before installing new spark plugs, use a gap guide to make sure your new spark plugs have the correct gap. NOTE: ACDelco Professional Iridium Spark Plugs are pre-gapped during manufacturing. Never attempt to gap an ACDelco Professional Iridium Spark Plug. You could damage the spark plug. Replace the incorrectly gapped ACDelco Professional Iridium Spark Plug with one that is correctly gapped.

FAQs:

Should I change my spark plugs every 3,000 miles?

  • No, it 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.


Can changing my spark plugs improve my engine’s performance?

  • Yes, but spark plugs may not be the only factor impacting performance. Replacing old spark plugs may temporarily improve poor engine performance due to reduced demand on the ignition system. However, this is not the cure for poor engine performance caused by worn rings, faulty carburetion, worn distributor parts or other engine performance issues.


Should I change all of my vehicle’s spark plugs at the same time?

  • Yes, if it is the scheduled time for spark plug replacement. It may be OK to replace one spark plug if it was broken for any reason prior to scheduled maintenance.


Does a diesel engine require a different type of plug than a gas engine?

  • Yes. Diesel engines require glow plugs because diesel engine ignitions operate differently than gas engines. ACDelco Professional Glow Plugs are specially designed to give diesel engines the heat they need for their cold starts.


Are ACDelco spark plugs pre-gapped?

  • Yes. When ACDelco spark plugs are manufactured, they are pre-gapped to the correct gap specification.


When I replace my spark plugs, should I also replace my spark plug wires?

  • Not always. Refer to your vehicle Owner’s Manual or contact the manufacturer for more information.


How do spark plugs become fouled?

  • Certain engine conditions can cause oil, powder and carbon to collect on the spark plug, causing a misfire. See our list of Signs and Causes of Spark Plug Wear.


What is pre-ignition and can it damage my engine?

  • Yes, pre-ignition can cause serious damage to your engine. Pre-ignition happens when the spark plug is too hot and fires before the piston is in the correct position.


Can I just clean my spark plugs instead of replacing them?

  • No, cleaning your old spark plugs is not recommended. Dirty, fouled spark plugs may also have broken, 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.
Spark Plug
12673527
Replaces: 12673528
Description: 1.5L turbo, ac delco markings. More
Fits:
  • Chevrolet:
    • Malibu
$13.56
$8.61
$13.56
$8.61
Spark Plug
12637197
Fits:
  • Chevrolet:
    • Volt
$11.90
$7.56
$11.90
$7.56
Spark Plug
92457960
Description: 3.6L, with cng. More
Fits:
  • Chevrolet:
    • Impala
$11.90
$7.56
$11.90
$7.56
Spark Plug
55486272
Description: 1.8L. More
Fits:
  • Chevrolet:
    • Malibu
$11.90
$7.56
$11.90
$7.56
Spark Plug
55490097
Fits:
  • Buick:
    • Cascada
$11.90
$7.56
$11.90
$7.56
Spark Plug
12662396
Description: Coupe, 3.6L with twin-turbo. 3.6L & 3.6L twin-turbo, with twin-turbo. More
Fits:
  • Cadillac:
    • ATS,
    • CTS,
    • XTS
$11.90
$7.56
$11.90
$7.56
Spark Plug
12642791
Description: 3.6L & 3.6L twin-turbo, with twin-turbo. 3.6L & 3.0L twin-turbo, with twin-turbo. More
Fits:
  • Cadillac:
    • CT6,
    • CTS
$10.72
$6.81
$10.72
$6.81
Spark Plug
12646780
Description: 3.6L. More
Fits:
  • Cadillac:
    • ATS,
    • CT6,
    • CTS
  • Chevrolet:
    • Camaro
$11.90
$7.56
$11.90
$7.56
Spark Plug
19316339
Fits:
  • Chevrolet:
    • City Express
$25.22
$15.89
$25.22
$15.89
Spark Plug
12627160
Description: 2.5L. More
Fits:
  • Cadillac:
    • ATS
  • Chevrolet:
    • Colorado,
    • Impala,
    • Malibu,
    • Malibu Limited
  • GMC:
    • Canyon
  • 1 more
$11.90
$7.56
$11.90
$7.56
Spark Plug
12647827
Description: 2.0L turbo. More
Fits:
  • Buick:
    • Regal
  • Cadillac:
    • ATS,
    • CT6,
    • CTS
  • Chevrolet:
    • Camaro,
    • Malibu
  • 1 more
$10.72
$6.81
$10.72
$6.81
Spark Plug
12642722
Description: With supercharger. More
Fits:
  • Chevrolet:
    • Corvette
$11.90
$7.56
$11.90
$7.56
Spark Plug
12622441
Description: 4.3L. 5.3 & 6.2L. More
Fits:
  • Cadillac:
    • Escalade,
    • Escalade ESV
  • Chevrolet:
    • Camaro,
    • Corvette,
    • Silverado 1500,
    • Suburban,
    • Tahoe
  • GMC:
    • Sierra 1500,
    • Yukon,
    • Yukon XL
  • 5 more
$11.90
$7.56
$11.90
$7.56
Spark Plug
55585517
Description: 1.8L. 1.4L turbo. More
Fits:
  • Buick:
    • Encore
  • Chevrolet:
    • Cruze,
    • Cruze Limited,
    • Sonic,
    • Trax
$11.90
$7.56
$11.90
$7.56
Spark Plug
25190786
Fits:
  • Chevrolet:
    • Spark
$10.72
$6.81
$10.72
$6.81
Spark Plug
55585534
Description: 1.8L. More
Fits:
  • Cadillac:
    • ELR
  • Chevrolet:
    • Cruze,
    • Cruze Limited,
    • Sonic,
    • Volt
$11.90
$7.56
$11.90
$7.56
Spark Plug
12622561
Description: 3.6L. More
Fits:
  • Buick:
    • Enclave,
    • LaCrosse
  • Cadillac:
    • ATS,
    • CTS,
    • SRX,
    • STS,
    • XTS
  • Chevrolet:
    • Camaro,
    • Caprice,
    • Captiva Sport,
    • Colorado,
    • Equinox,
    • Impala,
    • Impala Limited,
    • Malibu,
    • Traverse
  • GMC:
    • Acadia,
    • Canyon,
    • Terrain
  • Saturn:
    • Aura,
    • Outlook,
    • Vue
  • 17 more
$11.90
$7.56
$11.90
$7.56
Spark Plug
12620540
Description: 2.0L. More
Fits:
  • Buick:
    • LaCrosse,
    • Regal,
    • Verano
  • Chevrolet:
    • Captiva Sport,
    • Cobalt,
    • Equinox,
    • HHR,
    • Malibu
  • GMC:
    • Terrain
  • Pontiac:
    • Solstice
  • Saturn:
    • Sky
  • 6 more
$11.90
$7.56
$11.90
$7.56
Spark Plug
12571165
Description: 7.0L. 6.2L with supercharged. 6.2L with supercharger. More
Fits:
  • Cadillac:
    • CTS
  • Chevrolet:
    • Camaro,
    • Corvette
$11.90
$7.56
$11.90
$7.56
Spark Plug
12621258
Description: 6.0 & 6.2L. More
Fits:
  • Cadillac:
    • Escalade,
    • Escalade ESV,
    • Escalade EXT
  • Chevrolet:
    • Avalanche,
    • Camaro,
    • Caprice,
    • Colorado,
    • Impala,
    • Silverado 1500,
    • Silverado 2500 HD,
    • Silverado 3500 HD,
    • SS,
    • Suburban 1500,
    • Suburban 2500,
    • Tahoe
  • GMC:
    • Canyon,
    • Sierra 1500,
    • Sierra 2500 HD,
    • Sierra 3500 HD,
    • Yukon,
    • Yukon XL 1500,
    • Yukon XL 2500
  • Hummer:
    • H3,
    • H3T
  • Pontiac:
    • G8
  • 20 more
$11.90
$7.56
$11.90
$7.56
Spark Plug
55564962
Fits:
  • Chevrolet:
    • Volt
$11.90
$7.56
$11.90
$7.56
Spark Plug
55564748
Description: 2.8L. More
Fits:
  • Cadillac:
    • SRX
$19.36
$12.29
$19.36
$12.29
Spark Plug
25186682
Fits:
  • Chevrolet:
    • Aveo,
    • Aveo5
  • Pontiac:
    • G3
$10.66
$6.77
$10.66
$6.77
Spark Plug
19185438
Description: 1.8L. More
Fits:
  • Pontiac:
    • Vibe
$11.90
$7.56
$11.90
$7.56
Ignition Coil
12629037
Other Names: Spark Plug, Coil More
Description: Outlook. More
Fits:
  • Buick:
    • Enclave,
    • LaCrosse,
    • Rendezvous
  • Cadillac:
    • CTS,
    • SRX,
    • STS
  • Chevrolet:
    • Traverse
  • GMC:
    • Acadia
  • Saturn:
    • Outlook
  • 4 more
$142.54
$86.95
$142.54
$86.95
Spark Plug
12571535
Description: 4.4 & 4.6L, 4.6L. More
Fits:
  • Buick:
    • Lucerne
  • Cadillac:
    • DTS,
    • STS,
    • XLR
$10.66
$6.77
$10.66
$6.77
Spark Plug
12591131
Positions: Right, Left
Description: 3.9L. 3.5L. More
Fits:
  • Buick:
    • Lucerne,
    • Terraza
  • Chevrolet:
    • Impala,
    • Malibu,
    • Monte Carlo,
    • Uplander
  • Pontiac:
    • G6,
    • Montana
  • Saturn:
    • Aura,
    • Relay,
    • Vue
  • 6 more
$11.90
$7.56
$11.90
$7.56
Plug Wire Shield
19329681
Other Names: Shield More
Fits:
  • Cadillac:
    • CTS
  • Chevrolet:
    • Camaro,
    • Monte Carlo
  • Hummer:
    • H3,
    • H3T
  • Pontiac:
    • GTO
  • 1 more
$8.63
$5.53
$8.63
$5.53
Spark Plug
12611882
Fits:
  • Buick:
    • Enclave
  • GMC:
    • Acadia
  • Saturn:
    • Outlook
$11.90
$7.56
$11.90
$7.56
Spark Plug
19300872
Positions: Right, Left
Description: 3.6L. More
Fits:
  • Buick:
    • Enclave,
    • LaCrosse,
    • Rendezvous
  • Cadillac:
    • CTS,
    • STS
  • Chevrolet:
    • Equinox,
    • Malibu
  • GMC:
    • Acadia
  • Pontiac:
    • G6,
    • G8,
    • Torrent
  • 6 more
$10.66
$6.77
$10.66
$6.77
Spark Plug
12592619
Description: 4.4 & 4.6L, 4.4L. More
Fits:
  • Cadillac:
    • STS,
    • XLR
$10.66
$6.77
$10.66
$6.77
Spark Plug
12625058
Description: Coupe, 2.2, 2.4L. More
Fits:
  • Buick:
    • Rainier
  • Chevrolet:
    • Classic,
    • Cobalt,
    • Colorado,
    • HHR,
    • Malibu,
    • Trailblazer,
    • Trailblazer EXT
  • GMC:
    • Canyon,
    • Envoy,
    • Envoy XL,
    • Envoy XUV
  • Hummer:
    • H3,
    • H3T
  • Oldsmobile:
    • Alero,
    • Bravada
  • Pontiac:
    • G5,
    • G6,
    • Grand Am,
    • Solstice
  • Saturn:
    • Aura,
    • Ion,
    • Sky,
    • Vue
  • 19 more
$11.90
$7.56
$11.90
$7.56
Spark Plug
19185432
Description: 2.4L. 1.8l with ho. More
Fits:
  • Pontiac:
    • Vibe
$11.90
$7.56
$11.90
$7.56
Spark Plug
96130723
Description: Sedan, 2007-08. More
Fits:
  • Chevrolet:
    • Aveo,
    • Aveo5
$10.66
$6.77
$10.66
$6.77
Spark Plug
12610767
Description: 2.0L. More
Fits:
  • Chevrolet:
    • Cobalt
  • Saturn:
    • Ion
$11.90
$7.56
$11.90
$7.56
Spark Plug
12571533
Description: 4.4 & 4.6L. 4.4 & 4.6L, 4.6L. More
Fits:
  • Cadillac:
    • STS,
    • XLR
$10.66
$6.77
$10.66
$6.77
Spark Plug
12582002
Description: 3.5L. More
Fits:
  • Saturn:
    • Vue
$21.48
$13.53
$21.48
$13.53
Spark Plug
94859448
Description: 1.8l without ho. More
Fits:
  • Pontiac:
    • Vibe
$21.29
$13.41
$21.29
$13.41
Spark Plug
19301814
Positions: Left, Right
Description: 2.8 & 3.6L. 3.6L, 1st design. More
Fits:
  • Buick:
    • LaCrosse,
    • Rendezvous
  • Cadillac:
    • CTS,
    • STS
$11.90
$7.56
$11.90
$7.56
Spark Plug
12607280
Description: 2.2L. Coupe,. Sedan, 2003-06. More
Fits:
  • Chevrolet:
    • Cobalt
  • Saturn:
    • Ion,
    • Vue
$11.90
$7.56
$11.90
$7.56
Spark Plug
19256067
Description: 5.3L. 6.0 & 6.2L. More
Fits:
  • Buick:
    • LaCrosse,
    • Rainier
  • Cadillac:
    • CTS,
    • Escalade,
    • Escalade ESV,
    • Escalade EXT
  • Chevrolet:
    • Astro,
    • Avalanche 1500,
    • Avalanche 2500,
    • Corvette,
    • Impala,
    • Monte Carlo,
    • Silverado 1500,
    • Silverado 2500 HD,
    • Silverado 3500 HD,
    • Suburban 1500,
    • Suburban 2500,
    • Tahoe
  • GMC:
    • Safari,
    • Sierra 1500,
    • Sierra 2500 HD,
    • Sierra 3500 HD,
    • Yukon,
    • Yukon XL 1500,
    • Yukon XL 2500
  • Hummer:
    • H3
  • Pontiac:
    • G8,
    • Grand Prix,
    • GTO
  • 24 more
$11.90
$7.56
$11.90
$7.56
Spark Plug
12578277
Description: 8.1L. More
Fits:
  • Chevrolet:
    • Avalanche 2500
$10.66
$6.77
$10.66
$6.77
Spark Plug
12568387
Positions: Left, Right
Description: 3.5L. More
Fits:
  • Buick:
    • LaCrosse,
    • Lucerne,
    • Park Avenue,
    • Regal,
    • Rendezvous,
    • Terraza
  • Chevrolet:
    • Equinox,
    • Malibu,
    • Monte Carlo,
    • Silverado 1500,
    • Uplander,
    • Venture
  • GMC:
    • Sierra 1500
  • Oldsmobile:
    • Alero
  • Pontiac:
    • Aztek,
    • G6,
    • Grand Am,
    • Grand Prix,
    • Montana,
    • Torrent
  • Saturn:
    • Relay
  • 16 more
$11.90
$7.56
$11.90
$7.56
Spark Plug
24425327
Description: 3.0L. More
Fits:
  • Saturn:
    • Vue
$10.66
$6.77
$10.66
$6.77
Boot
12576465
Description: 2.2L. Sedan, 2003-06. More
Notes: Included With Ignition Module. More
Fits:
  • Chevrolet:
    • Cobalt,
    • HHR,
    • Malibu
  • Saturn:
    • Ion,
    • Vue
$61.99
$38.44
$61.99
$38.44
Spark Plug
21025102
$4.32
$2.76
$4.32
$2.76
Spark Plug
25181358
$10.72
$9.65
$10.72
$9.65
Spark Plug
19157985
$3.24
$2.09
$3.24
$2.09
Spark Plug
19157994
$2.98
$2.68
$2.98
$2.68
Spark Plug
19157998
$2.98
$2.68
$2.98
$2.68