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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GM Genuine Parts D303A (19166099) Ignition Distributor Cap

GM Genuine Parts D303A (19166099) Ignition Distributor Cap

Product ID: 5674352

Details

Brand
GM GENUINE
Color
Black
Exterior Finish
Metal
Item dimensions L x W x H
6.7 x 5.7 x
Material
Metal

⚡Max conductivity metal inserts

🔧Easy-install locator keys

🛡️Full anti-arc barrier

€ 65.02

Duties & taxes included

In stock

Sold byAmazon SlovakiaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

⚡ Ignite your engine’s potential with GM Genuine Parts!

GM OE QUALITY ASSURANCE - Factory-recommended part delivering unmatched durability and perfect fit.
PRECISION METAL INSERTS - Ensures peak electrical conductivity for flawless ignition performance.
USER FRIENDLY LOCATOR KEYS - Simplifies installation, saving you time and hassle on every replacement.
ANTI ARC BARRIER PROTECTION - Minimizes secondary voltage arcs to prevent engine misfires and boost reliability.
24 MONTH UNLIMITED MILEAGE WARRANTY - Confidence backed by a robust warranty for long-term peace of mind.

The GM Genuine Parts D303A Ignition Distributor Cap is a vehicle-specific, factory-recommended replacement part engineered with metal inserts for optimal conductivity, easy-to-read locator keys for quick installation, and a full anti-arc barrier to prevent misfires. Built to GM OE standards, it guarantees durability, perfect fit, and comes with a 24-month unlimited mileage warranty, making it the trusted choice for maintaining your GM vehicle’s ignition system.

Specifications

ASIN	B000BYB1Y4
Automotive Fit Type	Vehicle Specific Fit
Best Sellers Rank	#61,643 in Automotive ( See Top 100 in Automotive ) #3 in Automotive Replacement Distributor Caps
Brand	GM GENUINE PARTS
Brand Name	GM GENUINE PARTS
Closure Type	Twist-On
Color	Black
Compatible with Vehicle Type	Vehicle
Customer Reviews	4.7 out of 5 stars 1,045 Reviews
Exterior Finish	Metal
Global Trade Identification Number	40707773268450
Item Dimensions	6.7 x 5.7 x 4.2 inches
Item dimensions L x W x H	6.7 x 5.7 x 4.2 inches
Manufacturer	ACDelco
Manufacturer Part Number	19166099
Manufacturer Warranty Description	24 Months / Unlimited Miles on parts sold on or after 04/01/18. (Parts Only) Please see ACDelco.com for more details.
Material	Metal
Material Type	Metal
Model Number	D303A
Number of Items	1
OEM Equivalent Part Number	19166099
Style Name	Simple
UPC	707773268452
Unit Count	1 Count
Vehicle Service Type	Vehicle

Reviews

J**N

Good quality part

Fit Just like the original

25.08.2026

P**R

Quality

Received item well packaged but 5 days late. Fit my gmc 5.7l v8 perfectly. Would recommend.

12.07.2025

A**R

OEM part thumbs up

Fit works perfectly

28.02.2026

E**E

Good deal !

It's been over a year and everything seems to be fine with this part.

25.11.2025

D**E

a fair value for an AC Delco part.

I was pleased to find this distributor cap by AC Delco for my 1995 Chev 7.4 C-3500. Delco quality at a decent price and I didn't have to go to the store to buy it as I live 13 miles outside of town.

6.03.2023

R**Y

Distributor cap & rotor button review.

I have not installed this unit yet, but if it's genuine GM, i'm sure it'll hold up for at least three years

1.11.2025

D**Z

Son originales

Funciona bien le quedó exacto es lo que esperaba

7.10.2025

K**E

fits perfect

great product

24.04.2025

J**N

good fit

perfect fit

31.10.2022

E**S

Excelente

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

22.02.2026

G**E

Quality product

Fit well ,well built

23.09.2022

S**I

Fits 1995 yukon just fine

22.12.2020

J**S

Fitment was perfect on my 92 Suburban 2500

Ac/Delco rules. Fitment was perfect on my 92 Suburban 2500.

27.06.2018

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TrustScore 4.5 | 7,300+ reviews

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2 weeks ago

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3 days ago

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