What are the symptoms of a bad ignition coil?

A failing ignition coil can cause several symptoms, including the “Check Engine Light” appears, engine misfires, difficulty starting the vehicle, reduced fuel economy and loss of power during acceleration.

How often should spark plugs be replaced?

Spark plug replacement intervals depend on the type of spark plug and the vehicle’s engine. Refer to your vehicle’s Owner’s Manual for more information.

How can I tell if my distributor cap and rotor need replacing?

Distributor caps and rotors typically need replacement when you notice engine misfires, difficult vehicle startup, reduced engine performance, corrosion or carbon tracking on the cap, or cracks or wear on the rotor.

What is the difference between glow plugs and spark plugs?

Glow plugs are used in diesel engines to preheat the combustion chamber for a cold start. Spark plugs are used in gasoline engines to ignite the air and fuel mixture.

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

No. The "Service Engine Soon" light comes on when the vehicle’s computer detects a minor malfunction, an engine emissions issue or that routine maintenance is needed. For more information, refer to your vehicle owner's manual.

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ACDelco D303A GM Original Equipment Ignition Distributor Cap

ACDelco D303A GM Original Equipment Ignition Distributor Cap

Product ID: 421393772

Details

Brand
GM GENUINE
Colour
Black
Exterior Finish
Metal
Item dimensions L x W x H
17 x 14.5 x
Material
Metal

⚡Max conductivity metal inserts

🔧Easy-install locator keys

🛡️Anti-arc barrier for misfire prevention

HK$724

Duties & taxes included

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Description

⚡ Ignite your GM’s performance with precision and reliability!

PRECISION METAL INSERTS - Ensures peak electrical conductivity for flawless ignition ⚡
GM RECOMMENDED OEM QUALITY - Guaranteed fit and durability trusted by General Motors
USER FRIENDLY LOCATOR KEYS - Simplifies installation, saving you time and hassle 🔧
ANTI ARC BARRIER TECHNOLOGY - Minimizes engine misfires by blocking secondary voltage arcs 🛡️
DURABILITY MEETS PERFORMANCE - Built to last with premium materials and backed by a 12-month/12,000-mile warranty

The ACDelco D303A GM Original Equipment Ignition Distributor Cap is a vehicle-specific, OEM-quality replacement part designed to deliver maximum conductivity and reduce engine misfires. Featuring metal inserts for optimal fit, easy-to-read locator keys for quick installation, and a full anti-arc barrier, it ensures reliable ignition performance. Backed by GM’s trusted standards and a 12-month/12,000-mile warranty, this distributor cap guarantees durability and seamless compatibility with your GM vehicle.

Specifications

Asin	B000BYB1Y4
Automotive Fit Type	Vehicle Specific Fit
Brand Name	GM GENUINE PARTS
Closure Type	Twist-On
Colour	Black
Compatible With Vehicle Type	Vehicle
Customer Reviews	4.7 4.7 out of 5 stars (1,013) 4.7 out of 5 stars
Exterior Finish	Metal
Global Trade Identification Number	40707773268450
Item Dimensions	17 x 14.5 x 10.7 Centimeters
Manufacturer	GM GENUINE PARTS
Manufacturer Part Number	19166099
Manufacturer Warranty Description	12 Months / 12,000 Miles (Parts Only)
Material Type	Metal
Model	D303A
Number Of Items	1
Oem Equivalent Part Number	19166099
Style Name	Modern
Unit Count	1.0 Count
Upc	707773268452

Reviews

User

Good quality part

Fit Just like the original

25.08.2026

User

good fit

perfect fit

31.10.2022

User

Excelente

Muy buen elemento lo instale en mi Cheyenne 1990 y funciona mucho mejor la recomiendo

22.02.2026

User

delco for the win

Put it on a 1993 K1500 5.7 liter 350 v8. Seems well built and I've used delco my whole life without issues.

6.09.2026

User

Quality product

Fit well ,well built

23.09.2022

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TrustScore 4.5 | 7,300+ reviews

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Excellent communication throughout the order process. Product is perfect.

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HK$724

Duties & taxes included

In stock

Sold byAmazon Hong KongDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Hong Kong.

Secure transaction

Trustpilot

TrustScore 4.5 | 7,300+ reviews

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Fast shipping and excellent packaging. The Leatherman tool feels very premium and sturdy.

1 day ago

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