Ignition Coils

An ACDelco GM Original Equipment Ignition Coil is a GM-recommended replacement for your vehicle’s original component and undergoes more stringent testing than aftermarket products. It increases electrical system voltage to help ignite the air/fuel mixture as 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. An ACDelco GM OE Ignition Coil uses pure copper windings to improve durability and provide higher resistance to internal shorts and dielectric breakdown. Because the number and shape of the laminations determine the output characteristics of an ignition coil, ACDelco ensures that the silicone steel plates surrounding the coil correctly match the original part size and number. Since steel laminations work best when they are new, shiny and clean, ACDelco laminations are coated to hinder corrosion and many feature molded plastic protection to help ensure that nothing is exposed. This Original Equipment Ignition Coil has been manufactured to fit your specific GM vehicle, providing the same performance, durability and service life you expect from General Motors.

FEATURES & BENEFITS

• High-quality coated windings to improve durability and provide protection against internal shorts and dielectric breakdown
• Silicone steel plates surrounding the ignition coil correctly match the original part size and number exactly
• Laminations are coated to hinder corrosion, and many feature molded plastic protection to help ensure that nothing is exposed
• Undergoes stringent testing, often under extreme or unusual conditions, to help deliver the quality parts you expect from ACDelco
• GM-recommended replacement part for your GM vehicle’s original factory component
• Offering the quality, reliability and durability of GM OE
• Manufactured to GM OE specifications for fit, form and function

PRODUCT FACTS

Find out more about ACDelco GM OE Ignition Coils and how they fit into the Starting and Charging System with the product facts below.

Function

Increases electrical system voltage to help ignite the air/fuel mixture.

Signs of Wear & Troubleshooting

Due to an internal short or opening, a cracked case, a loose or disconnected power/signal source or loose or disconnected high voltage wires, these problems may occur:

• Engine will not start or run
• Reduced power
• Excessive tailpipe emissions
• “Check Engine” light is on
• Engine misfire
• Reduced fuel economy

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:

Having your service technician regularly inspect your ignition system can help you stay away from conditions that may result in poor performance or reduced fuel economy.

Is there a problem when my “Service Engine Soon” light appears?

When your “Service Engine Soon” light illuminates, that is an indication that there is a potential issue with the drivability, electronics or emissions of your engine.

While investigating what triggered the “Service Engine Soon” light, do you recommend any additional services?

Preventative maintenance should be referenced in your Owner's Manual and while repairing or having your “Service Engine Soon” light repaired, if your vehicle is due for maintenance, yes. As described in your Owner's Manual, this maintenance will help prevent future issues.

If I don't investigate the problem, will the light turn off by itself?

Possibly. Sometimes, the triggering device will reset itself thus turning off the “Service Engine Soon” light until that device/sensor is tested by the vehicle’s on-board computer again. If it fails the test again, the “Service Engine Soon” light will illuminate once again. Some devices/sensors when tested and failed will illuminate the “Service Engine Soon” light, and it will not go out until correct service work is performed.

If I ignore the light, will there be consequences?

General Motors has designed the vehicle to inform its driver if there is an issue with certain devices/sensors that affect the drivability/emissions. If this is ignored, there is a possibility that the drivability will suffer, fuel economy will be decreased or the emissions will be increased. Do not ignore the “Service Engine Soon” light.

Is it possible for my vehicle to pass an emissions test if the “Service Engine Soon” light is on?

No. When state and local officials perform certified emission tests, one of the first steps in the process is to inspect for an illuminated “Service Engine Soon” light. If it is on, it will automatically fail the test.

Does the “Service Engine Soon” light tell me when my vehicle needs a tune-up?

No. The “Service Engine Soon” light is related to engine emissions and drivability conditions. Please refer to your Owner's Manual maintenance schedule for information pertaining to tune-up time intervals.