Restore a strong, consistent spark and keep every cylinder firing with the Delphi Ignition Coil GN11100. It drops in as a direct-fit replacement for the listed applications: the 2021-2024 Buick Envision, 2020-2024 Cadillac CT4, 2021-2024 Cadillac CT5, 2020-2024 Cadillac XT4, 2020-2024 Cadillac XT5, 2021-2024 Cadillac XT6, 2020-2024 Chevrolet Blazer, and 2020-2023 GMC Acadia.
An ignition coil transforms the vehicle's low battery voltage into the high-voltage pulse needed to jump the spark plug gap and ignite the air-fuel mixture in the combustion chamber. When a coil breaks down, that spark weakens or drops out, which is why a failing coil is a common cause of the symptoms below.
If a failed ignition coil is the cause of your misfire, this unit replaces it; diagnose the misfiring cylinder before ordering.
Interchange: 55511558 · 55513555 · 55515866. Manufacturer part number GN11100.
This part cross-references / interchanges with the following part numbers:
What does this ignition coil do?
It transforms the vehicle's low battery voltage into the high-voltage pulse needed to jump the spark plug gap and ignite the air-fuel mixture in the cylinder.
Will this fit my vehicle?
It is a direct-fit replacement for the 2021-2024 Buick Envision, 2020-2024 Cadillac CT4/XT4/XT5, 2021-2024 Cadillac CT5/XT6, 2020-2024 Chevrolet Blazer, and 2020-2023 GMC Acadia. Check the Buyer's Guide tab.
What are the signs a coil may need replacing?
Common signs include engine misfire, rough idle, hard starting, hesitation, reduced fuel economy, or an illuminated check engine light. Diagnose the cause before replacing.
What numbers does this coil interchange with?
It cross-references 55511558, 55513555, and 55515866. Its own manufacturer part number is GN11100.
Should I replace more than one coil at a time?
Only replace what your diagnosis calls for. If one coil has failed, address that cylinder; some owners replace others as preventive maintenance, but that is optional.
WARNING: These products can expose you to chemicals including lead and phthalates, which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.
