15% OFF ORDERS $35+ | 20% OFF $100+ | ONLINE ONLY
USE CODE
CRUISE
*
Exclusions apply.
Advance Auto Parts Logo
Choose a Store
  • Shop All
  • Replacement Parts
  • Performance Parts
  • Accessories
  • Oil & Fluids
  • Special Offers
  • Advance Rewards
  • Advice & How-Tos
  • Project Guides
  • FAQ / Help Desk
Loading...
Share
Product thumb
Product thumb
Product main large

GM Genuine Parts Distributor Cap

(59 reviews)
Part # D328A
2 year warranty
Loading...
Loading...
How Would You Like To Get This Item?

Store Pickup

Loading...Loading...Loading...

Same Day Home Delivery

Loading...Loading...Loading...

Home Delivery

Loading...Loading...Loading...
Loading...
Loading...
Loading...Loading...Loading...Loading...Loading...

Product Information

Product Details
Part No. D328A
Warranty Details (2 Year Warranty)
ACDelco GM Original Equipment Distributor Cap is a GM-recommended replacement component for one or more of the following vehicle systems: cooling, hvac, ignition, starting and charging, body-electrical and lighting, wiper and washer, and/or engine fuel management. This original equipment cap will provide the same performance, durability, and service life you expect from General Motors.

Product Features:
  • 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 specification for fit, form, and function
Specifications
Cap Mounted Coil:
No

Color:
Black

Contact Terminal Material:
Metal

Distributor Cap Contacts Material:
Carbon

Distributor Cap Tower Quantity:
6

Distributor Type:
Electronic

Distributor Vent:
No

Height:
1.65 in

Length:
4.25 in

Material:
Polyester

Mounting Type:
Screw

Plug Wire Retainer Attached:
No

Programming Required:
NO

Tower Position:
Horizontal

Weight:
0.41 lb

Width:
6.55 in
Loading...
Loading...Loading...Loading...Loading...Loading...
4.83 out of 5
59 Customer Reviews
100% of respondents would recommend this to a friend
Ratings Distribution
5 Stars
51
4 Stars
6
3 Stars
2
2 Stars
0
1 Star
0
Excellent  price along with 25% discount for GM OEM parts
Pros
10
Improves Engine Efficiency
9
Easy To Install
6
Increases Power
4
Durable
4
Lightweight
Cons
2
Difficult To Install
1
Needs Brass Contacts
Best Uses
10
Everyday Driving
6
Replacement
1
Restoration
1
Chevy vehicles
Car & Truck
2
Mechanic
1
Auto Enthusiast
1
Casual Driver
Describe Yourself
7
Casual Driver
2
Truck Enthusiast
1
Mechanic
1
Mostly Short Trips
Most Liked Positive Review
AC Delco Cap
Sonoma 4.3 V6, AC Delco cap. fit perfect, works great. Glad I replaced as heavy corrosion was on all terminals inside the cap. How it was still running is beyond me. Probably the original cap from 2003. Definitely take a silver sharpie or white pen and highlight all the numbers on the cap and the wires. Makes it so much easier to read and not get them mixed up as it is very awkward to remove the cap. Not sure why GM went to screws to hold cap vs, old style clips or L clamp. Caution they are NOT philips they are torx and 2 different sizes between cap and rotor. Have had bad experience with aftermarket caps and rotors so 'splurged' on OEM to make sure it fit/functioned properly. Came with new screws for cap with adhesive so they do not back out (as original).
Most Liked Negative Review
Delco distributor cap
Construction is a little flimsy thin plastic with aluminum contacts. Needs to come with DIELECTRIC GREASE for ignition cable attachment. A vent for moisture would also be a nice addition along with brass contacts.
Reviewed by 59 Customers
Good Choice
Staff Reviewer -
It does improve your gas mileage and it is not hard to install
Bottom Line Yes, I would recommend to a friend
AC Delco Cap
Staff Reviewer -
Ac delco product are pricey but good quality
Bottom Line Yes, I would recommend to a friend
The only cap and rotor for vortec!
Verified Buyer -
If you have a 4.3 vortec definately buy the ac delco cap and rotor! Aftermarket versions will let you down eventually.
Excellent price along with 25% discount for GM OEM parts
Verified Buyer -
Excellent product! Bought a used 1999 jimmy 4.3 in excellrnt shape. Guy decuded hr wasnt spending another dime on it after restoring and update frame and suspension bushings parts, exhaust, etc after he put on a non AC Delco distributor cap only to have it start misfiring and missing out. He was done with that Jimmy. I bought it for a great price then stuck a ACDelco OEM distributor cap on it and BOOM! it run like dream. Still is. If your considering cheaper brands for your Jimmy/Blazer engine dont.The excellent price along with 25% discount for GM OEM parts was a hands down deal from Advanced Auto for me and my Jimmy.
i would buy this again
Verified Buyer -
working just fine
Loading...
Loading...Loading...Loading...Loading...Loading...
No results
Loading...
Loading...Loading...Loading...Loading...Loading...
Feedback
Be The First To Know About Deals And Promotions.
Plus, create an account to receive $5 off of $20 or more.
TOP REPLACEMENT PARTS
Brake Pads & Shoes
Brake Rotors
Alternators
Water Pumps
Starters
Brake Calipers

Order Lookup

Help Desk

Store Locator

In Store Services

Mobile App

CUSTOMER SUPPORT
Accessibility Statement
Contact Us
Forgot Password
Help Desk
In Store Pickup
In Store Services
Order Tracking
Recall Information
Return Policy
Same Day Delivery
© 2026 Advance Auto Parts
Privacy Policy
Terms of Use
Site Map
ADVANCING A WORLD IN MOTION®