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Delphi GN11100 Ignition CoilOE Quality 60-Day Returns
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Part #: GN11100

Delphi GN11100 Ignition Coil

⚙️ 36 vehicles fit this part
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✅OE Direct Replacement — Bolt-on fit, no modifications needed
🚗Fitment: Buick, Cadillac, Chevrolet, and GMC, Acadia, Blazer, CT4, CT5, Envision, XT4, XT5, and XT6
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Delphi GN11100 Ignition Coil

The Delphi GN11100 ignition coil is a standard replacement coil on plug unit built to OE design specifications. It is engineered for fast starts, steady engine performance, and efficient fuel delivery on select Buick, Cadillac, Chevrolet, and GMC applications.

Key Features

  • Coil on plug ignition coil for direct spark delivery
  • 12.0-volt standard ignition type
  • Black housing with elliptical female connector
  • 4-terminal male blade design with 1 connector and 2 mounting holes
  • Standard replacement grade for OE-style fit and function
  • Designed and endurance tested with high-quality materials
  • Delphi part number GN11100

Detailed Description

Delphi GN11100 is built for vehicles that use a coil on plug ignition setup, delivering the voltage needed for reliable spark at each cylinder. Delphi manufactures more than 10 million ignition coils for North America each year, and this unit is engineered to match OE design specifications for consistent operation. It is a practical choice for drivers looking for a direct replacement ignition coil for 2020-2024 Cadillac CT4, 2021-2024 Cadillac CT5, and 2020-2024 Cadillac XT4 applications, along with other listed fitments such as the 2020-2024 Chevrolet Blazer and 2020-2023 GMC Acadia. The GN11100 part number is also useful when cross-checking service records or ordering the correct replacement coil.

This part cross-references GM OE numbers 55511558 and 55513555 for the same application.

What It Helps Fix

  • Engine misfire caused by a weak or failing ignition coil
  • Hard starting or extended crank conditions
  • Rough idle and inconsistent cylinder performance
  • Loss of fuel efficiency from incomplete combustion
  • Check engine light concerns related to ignition output

Installation Notes and Tips

Verify connector shape, terminal count, and mounting style before installation. This coil uses a female elliptical connector, 4 terminals, and 2 mounting holes, and it does not include coil wire or mounting hardware. Confirm the vehicle uses a coil on plug ignition layout and match the OE part number GN11100 before replacing the original unit.

Quality Assurance

Delphi ignition coils are endurance tested and built from quality materials to support dependable ignition performance. The GN11100 is manufactured as a standard replacement part engineered to OE design specifications for the listed applications.

Compatible Vehicles

  • Fits 2021-2024 Buick Envision, N/A
  • Fits 2020-2024 Cadillac CT4, N/A
  • Fits 2021-2024 Cadillac CT5, N/A
  • Fits 2020-2024 Cadillac XT4, N/A
  • Fits 2020-2024 Cadillac XT5, N/A
  • Fits 2021-2024 Cadillac XT6, N/A
  • Fits 2020-2024 Chevrolet Blazer, N/A
  • Fits 2020-2023 GMC Acadia, N/A
BrandDelphi
Part NumberGN11100
Voltage12.0
ColorBlack
Ignition TypeStandard
Coil TypeCoil on plug
Coil Wire IncludedNo
Oil FilledNo
Requires External ResistorNo
Terminal TypeBlade
Mounting Hardware IncludedNo
Height122.6
Height4.827
Wire Quantity0
Grade TypeStandard replacement
Connector Quantity1
Connector ShapeElliptical
Mount Type2 mounting holes
Mounting Hole Quantity2
Terminal Quantity4
Connector GenderFemale
Terminal GenderMale
Package ContentsIgnition coil

This part fits 36 vehicles. Search below:

YearMakeModelLitersCylindersPositionNotes
2024BuickEnvision2.0LL4N/A
2024CadillacCT42.0LL4N/A
2024CadillacCT52.0LL4N/A
2024CadillacXT42.0LL4N/A
2024CadillacXT52.0LL4N/A
2024CadillacXT62.0LL4N/A
2024ChevroletBlazer2.0LL4N/A
2023BuickEnvision2.0LL4N/A
2023CadillacCT42.0LL4N/A
2023CadillacCT52.0LL4N/A
2023CadillacXT42.0LL4N/A
2023CadillacXT52.0LL4N/A
2023CadillacXT62.0LL4N/A
2023ChevroletBlazer2.0LL4N/A
2023GMCAcadia2.0LL4N/A
2022BuickEnvision2.0LL4N/A
2022CadillacCT42.0LL4N/A
2022CadillacCT52.0LL4N/A
2022CadillacXT42.0LL4N/A
2022CadillacXT52.0LL4N/A
2022CadillacXT62.0LL4N/A
2022ChevroletBlazer2.0LL4N/A
2022GMCAcadia2.0LL4N/A
2021BuickEnvision2.0LL4N/A
2021CadillacCT42.0LL4N/A
2021CadillacCT52.0LL4N/A
2021CadillacXT42.0LL4N/A
2021CadillacXT52.0LL4N/A
2021CadillacXT62.0LL4N/A
2021ChevroletBlazer2.0LL4N/A
2021GMCAcadia2.0LL4N/A
2020CadillacCT42.0LL4N/A
2020CadillacXT42.0LL4N/A
2020CadillacXT52.0LL4N/A
2020ChevroletBlazer2.0LL4N/A
2020GMCAcadia2.0LL4N/A

* Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.

This part directly replaces or is cross-referenced with the following part numbers:

555115585551355555515866

Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.

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