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ACDelco Conventional Spark Plug

# 21025103
2 YR REPLACEMENT IF DEFECTIVE
Part # 21025103
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Part No. 21025103
Warranty Details (2 YR REPLACEMENT IF DEFECTIVE)
ACDelco 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.

Product Features:
  • Black Onyx coating helps reduce corrosion
  • Copper core provides great heat transfer and helps maximize plug durability
  • In 03212019_LegalReviewCatalogingStatements
  • Nickel-chrome alloy sheathing helps prevent corrosion on center electrode
  • Available for use in Marine applications
  • Some ACDelco GM Original Equipment parts may have formerly appeared as GM Genuine Parts (OE) or ACDelco Professional
  • ACDelco GM Original Equipment parts are designed, engineered and tested to rigorous standards, and are backed by General Motors
  • GM Engineers design and validate OE parts specifically for your Chevrolet, Buick, GMC, or Cadillac vehicle
  • GM regularly updates production and service part designs to integrate new materials and technologies
Approximate Resistor Value:
3-7.5 k ohms

Center Electrode Core Material:
Copper

Ground Configuration:
Standard

Ground Electrode Quantity:
1

Ground Electrode Tip Design:
Standard

Height:
3.54 in

Hex Size:
16 mm

Insulator Height:
2.047 in

Length:
3.94 in

Pre-Gap Size:
0.043 in

Reach:
0.748 in

Resistor Type:
Yes

Seat Type:
Gasket

Thread Diameter:
0.551 in

Weight:
0.36 lb

Width:
0.94 in
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