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Details
- Brand:
- SKU:
D1977A
- GTIN: 00707773906767
- UPC: 707773906767
- Other Names:
19245558
- Description: GM Genuine Parts Ignition Control Modules are designed, engineered, and tested to rigorous standards, and are backed by General Motors. They increase voltage in order for the spark plugs to 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. A GM Genuine Parts Ignition Control Module features electronically welded lead connections to help reduce heat stress, failure, or cold joints. It has been laser trimmed to provide precise values and reduce deterioration and damage. This ignition control module includes a copper slug heat sink to help dissipate heat and create a more stable environment and it also features a large bus bar for added support and conductivity to address the installation and operating forces that stress terminal tabs. GM Genuine Parts are the true OE parts installed during the production of or validated by General Motors for GM vehicles. Some GM Genuine Parts may have formerly appeared as ACDelco GM Original Equipment (OE). ⚠ WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov
ignition-control-module;control-module;ignition-control;ignition; - Condition: New
- Warranty:
Ignition Coil Interface Module - ACDelco (D1977A)
Pricing is valid online only and may vary in your local store
Vehicle Fitment
Vehicle Fitment
| Year | Make | Model | Body & Trim | Engine & Transmission |
|---|
Key Product Information
Additional Information
| Brand | GM Genuine Parts |
| Connector Gender | Female |
| Connector Quantity | 1 |
| FAQ - Answer 1 | 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. |
| FAQ - Answer 2 | 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. |
| FAQ - Answer 3 | Possibly. Sometimes, the triggering device will reset itself thus turning off the 'Service Engine Soon' light until that device/sensor is tested by the vehicles on board computer again. If it fails the test again when tested, the 'Service Engine Soon' light will illuminate once again. Some devices/sensors when tested and failed will illuminate the 'Service Engine Soon' and it will not go out until correct service work is performed. |
| FAQ - Answer 4 | General Motors has designed the vehicle to inform its driver if there is an issue with certain devices/sensors that effect the drivability/emissions. If this is ignored, there is a possibility that the drivability will suffer, fuel economy will be decreased, or the emissions being emitted will be increased. Do not ignore the 'Service Engine Soon' light. |
| FAQ - Answer 5 | No. When state and local officials perform certified emission tests, one of the first steps in the process is to inspect for a 'Service Engine Soon'. If it is on, it will automatically fail the test. |
| FAQ - Answer 6 | No. The 'Service Engine Soon' 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. |
| FAQ - Question 1 | Is there a problem when my 'Service Engine Soon' light appears? |
| FAQ - Question 2 | While investigating what triggered the 'Service Engine Soon' light, do you recommend any additional services? |
| FAQ - Question 3 | If I don't investigate the problem, will the light turn off by itself? |
| FAQ - Question 4 | If I ignore the light, will there be consequences? |
| FAQ - Question 5 | Is it possible for my vehicle to pass an emissions test if the 'Service Engine Soon' light is on? |
| FAQ - Question 6 | Does the 'Service Engine Soon' light tell me when my vehicle needs a tune-up? |
| Features & Benefits - Bullet 1 | Feature electronically welded lead connections to reduce heat stress failure or cold joints |
| Features & Benefits - Bullet 2 | Laser trimmed to provide precise values and reduce deterioration and damage |
| Features & Benefits - Bullet 3 | Increase voltage in order for the spark plugs to ignite the air/fuel mixture |
| Features & Benefits - Bullet 4 | Include a copper slug heat sink to help dissipate heat and create a more stable environment |
| Features & Benefits - Bullet 5 | Equipped with a large bus bar for added support and conductivity to address the installation and operating forces that stress terminal tabs |
| Features & Benefits - Bullet 6 | Some GM Genuine Parts may have formerly appeared as ACDelco GM Original Equipment (OE) |
| Features & Benefits - Bullet 7 | GM Genuine Parts are designed, engineered and tested to rigorous standards, and are backed by General Motors |
| Features & Benefits - Bullet 8 | GM Engineers design and validate OE parts specifically for your Chevrolet, Buick, GMC, or Cadillac vehicle |
| Features & Benefits - Bullet 9 | GM regularly updates production and service part designs to integrate new materials and technologies |
| Good Maintenance Practices - Section 1 - Header | 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. |
| Height | 1.5 |
| Ignition Type | Electronic |
| Length | 7.1 |
| Meets or Exceeds Original Equipment Manufacture Specifications | Yes |
| Mount Type | Bolt On |
| Mounting Hardware Included | Yes |
| Programming Required | No |
| Signs of Wear & Troubleshooting - Section 1 - Bullet 1 | Engine will not start or run |
| Signs of Wear & Troubleshooting - Section 1 - Bullet 2 | Reduced Power |
| Signs of Wear & Troubleshooting - Section 1 - Bullet 3 | Excessive tailpipe emissions |
| Signs of Wear & Troubleshooting - Section 1 - Bullet 4 | Check Engine Light is on |
| Signs of Wear & Troubleshooting - Section 1 - Bullet 5 | Engine misfire |
| Signs of Wear & Troubleshooting - Section 1 - Bullet 6 | Reduced fuel economy |
| Signs of Wear & Troubleshooting - Section 1 - Header | Due to an internal short or opening, a cracked case, a loose or disconnected power/signal source, loose or disconnected high voltage wires, these problems may occur: |
| Terminal Gender | Male |
| Terminal Quantity | 20 |
| Weight (lb) | 0.83 |
| Width | 3.9 |
Features and Benefits
Interchange
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Product Reviews
Brand
ACDelco
Shop Official ACDelco Parts Online | AutoNation Parts
Browse our complete catalog of ACDelco replacement components at AutoNation’s Aftermarket Store. As a premier global provider of automotive maintenance and repair products, ACDelco delivers OE-level precision, superior engineering, and long-lasting mechanical reliability.
- Maintenance & Wear Parts: OE-matched spark plugs, filters, and brake components built to exact factory tolerances.
- Batteries & Starting: Heavy-duty electrical components engineered for reliable power output and maximum lifespan.
- Engine & Mechanical Hardware: Durable replacement parts manufactured for a seamless drop-in fit across multiple vehicle makes.
Popular ACDelco categories available:
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Frequently Asked Questions for Ignition Coil Interface Module
How do I ensure Ignition Coil Interface Module fits my specific vehicle?
Verify your vehicle’s exact Year, Make, Model, Engine Size, and Trim Level using our vehicle selector above. Since manufacturing variations occur mid-model year, matching your original equipment (OE) part number or verifying fitment against your 17-digit Vehicle Identification Number (VIN) is the most accurate way to guarantee compatibility with D1977A.
Does Ignition Coil Interface Module meet or exceed Original Equipment (OE) standards?
Yes. ACDelco engineers components to meet or exceed original equipment specifications for fitment, thermal tolerance, and structural durability. This part is designed as a direct-fit replacement, maintaining factory performance without requiring custom modifications during installation.
Is this part EPA and CARB emissions compliant?
This component complies with Federal EPA emissions regulations for 49-state legal use. If your vehicle is registered in California or a state following California Air Resources Board (CARB) standards (such as NY, ME, or VT), please verify state-specific executive order (EO) compliance before purchase, as CARB-restricted parts cannot be legally installed on CARB-emissions equipped vehicles in those jurisdictions.
Does Ignition Coil Interface Module include all required installation hardware and gaskets?
Installation hardware inclusion varies by manufacturer assembly. If hardware, gaskets, or mounting brackets are supplied in the box, they will be explicitly listed in the product specs above. We recommend reviewing related components (such as new bolts, seals, or crush washers) prior to starting installation to ensure a complete repair.
Is there a core charge on Part #D1977A, and how do core returns work?
If a core deposit applies to this item, the exact core amount will display in your cart at checkout. To receive a full core credit, return your old, undamaged unit in the original manufacturer box within 30 days of purchase, following our standard Core Return guidelines.
What manufacturer warranty covers Ignition Coil Interface Module?
Ignition Coil Interface Module is backed by ACDelco’s standard manufacturer limited warranty protecting against defects in material and workmanship under normal vehicle operation. For specific coverage duration and claim procedures, please inspect our Warranty Information documentation.
How fast will Part #D1977A ship to my address?
Orders placed before daily regional fulfillment cutoffs are dispatched rapidly from AutoNation’s nationwide logistics network. Estimated delivery timelines and expedited shipping choices are calculated directly at checkout based on destination availability. Learn more on our Shipping Policy page.
What is the return policy if Ignition Coil Interface Module does not fit?
If an item arrives damaged or does not fit your verified application, you can request a return label through our portal under our standard Returns Policy. Returned items must be in clean, uninstalled condition in original brand packaging.
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Check your vehicle year, make, model, and engine requirements to ensure exact compatibility before placing your order.
Product Details
Upgrade or restore your vehicle with Ignition Coil Interface Module (SKU: D1977A) from ACDelco. Manufactured to strict quality standards, this replacement component delivers exact-fit precision, superior durability, and reliable operation under demanding driving conditions.
| Product Name | Ignition Coil Interface Module |
| Manufacturer / Brand | ACDelco |
| Part Number / SKU | D1977A |
| Part Condition | Brand New Replacement Part |
| Fitment Standard | Direct Fit OEM Replacement |
Frequently Asked Questions for Ignition Coil Interface Module
What are the core specifications of Ignition Coil Interface Module?
This Ignition Coil Interface Module (SKU: D1977A) is built by ACDelco using high-grade materials engineered for long-lasting performance, thermal stability, and exact-fit vehicle compatibility.
Is Ignition Coil Interface Module an original OEM or aftermarket replacement part?
This item (SKU: D1977A) manufactured by ACDelco is a premium aftermarket replacement part engineered to meet or exceed original equipment manufacturer specifications. It offers exact-fit reliability and maximum durability at a competitive price point.
How do I confirm Ignition Coil Interface Module fits my specific vehicle?
To verify fitment for Ignition Coil Interface Module, check compatibility using our fitment lookup tool above. Cross-reference your exact year, make, model, and engine specifications before ordering to ensure proper clearance and performance.
What related components should I inspect when replacing this part?
When installing a new Ignition Coil Interface Module, technicians recommend inspecting surrounding hardware, mounting brackets, seals, and connecting lines. Replacing worn supporting components at the same time helps prevent premature wear and maintains peak system efficiency.
What quality and manufacturing standards does ACDelco follow?
ACDelco replacement parts undergo rigorous quality testing and strict dimensional tolerance checks. Engineered using premium-grade materials, this component is designed to withstand harsh operating conditions, thermal stress, and routine vehicle vibration.
Can I install Ignition Coil Interface Module myself or do I need a technician?
Many ACDelco components are designed for straightforward DIY installation. Refer to factory service manuals or OEM repair procedures for exact torque specifications and sequence steps. If complex electrical diagnosis, specialized hydraulic bleeding, or heavy mechanical tools are required, consult a certified automotive technician.
What are the common symptoms indicating this component needs replacement?
Key indicators that a replacement part like Ignition Coil Interface Module may be needed include unusual noises, diminished mechanical responsiveness, fluid leaks, visible structural wear or corrosion, or active diagnostic trouble codes (DTCs) triggered by related sensors.
Does Ignition Coil Interface Module come with mounting hardware included?
Hardware inclusions vary by part type and manufacturer setup. Check the product specifications and images above to confirm whether installation hardware, gaskets, or adapters are supplied directly in the package.
How fast will Ignition Coil Interface Module ship to my location?
Orders for Ignition Coil Interface Module (SKU: D1977A) are processed rapidly from our nationwide distribution centers. Visit our Shipping Policy page to review estimated ground transit times, expedited shipping rates, and order tracking details.
What is the return policy for Ignition Coil Interface Module?
If Ignition Coil Interface Module arrives damaged or does not fit your vehicle, you can initiate a return or exchange under our standard Returns & Refund Policy. Please verify your vehicle fitment details prior to ordering to ensure seamless compatibility.
Why buy ACDelco parts from AutoNation Aftermarket?
AutoNation is one of America's most trusted automotive retailers with over 300+ locations nationwide. When you order ACDelco products from our aftermarket store, you get competitive direct pricing, guaranteed product authenticity, and dedicated customer support.