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

⚡Metal inserts for max conductivity

🔧Vehicle-specific perfect fit

🛡️Full anti-arc barrier protection

9552 som

Duties & taxes included

In stock

Sold byAmazon KyrgyzstanDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

⚡ Power your ride with GM precision – don’t let misfires slow you down!

TWIST ON CLOSURE - Secure fit with quick, tool-free installation
ANTI ARC BARRIER SHIELD - Minimizes misfires by preventing secondary voltage arcs
PRECISION METAL INSERTS - Ensures flawless electrical connection for peak engine performance
EASY INSTALL LOCATOR KEYS - Simplifies setup, saving you time and hassle
GM OE QUALITY DURABILITY - Factory-recommended for trusted reliability and longevity

The GM Genuine Parts D303A Ignition Distributor Cap is a vehicle-specific, factory-recommended replacement part engineered with metal inserts for optimal conductivity and a full anti-arc barrier to reduce engine misfires. Designed for easy installation with locator keys and a twist-on closure, it delivers the trusted durability and performance expected from GM OE components.

Specifications

ASIN	B000BYB1Y4
Automotive Fit Type	Vehicle Specific Fit
Best Sellers Rank	#55,718 in Automotive ( See Top 100 in Automotive ) #2 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

S**N

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

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

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

E**E

Good deal !

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

25.11.2025

D**Z

Son originales

Funciona bien le quedó exacto es lo que esperaba

7.10.2025

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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9552 som

Duties & taxes included

In stock

Sold byAmazon KyrgyzstanDelivered 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 Kyrgyzstan.

Secure transaction

Trustpilot

TrustScore 4.5 | 7,300+ reviews

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