Save Now on Select Holley Family of Brands Products!

Make/Model Search
Make/Engine Search

Brands
Savings Central
Contact Us
Help Center

My Garage
Wish List
Order Status & Returns

Welcome
My Account

Order Status

Wish List
Savings Central
Shop by Brand
Shop Your Passion
- Shop Your Passion
- Truck / SUV
  
  Jeep®
  
  Restoration
  
  Stock Replacement
  
  Late Model Muscle
  
  Tools
  
  Gifts, Clothing, & More
  
  Circle Track
  
  Street Rod
  
  Powersports
  
  Paint & Body
  
  Marine
  
  Jr Dragster
Gift Cards
My Garage
See Our Catalogs
News & Events
Career Opportunities
Contact Us
Help Center
New Products
Shop by Make/Model
Sign In

Search Make/Model

Search Make/Engine

Sign In

Welcome
Account Dashboard
Profile
Order Status & Returns
Buy It Again
Wish List
Rewards Program
Gift Cards & Summit Bucks
Address Book
My Garage Settings
Email Preferences
Text Notifications
My Reviews
My Questions
Catalogs
Tax Exemption
Sign In

Save Now on Select Holley Family of Brands Products!

Haul in the Savings - Shop the Truck Savings Event Today!

Filters

In Stock
- In Stock Items, Including at a Supplier. Ships In a Few Days. (6) The options in this area are not available since you have already selected choices in the area. Use the "Get Results" button for your current choices.
- All Items, Including Not In Stock (6) The options in this area are not available since you have already selected choices in the area. Use the "Get Results" button for your current choices.
Make/Model
Department
- Fittings & Hoses
- Gaskets & Seals
Part Type
- Oil Cooler Gaskets and Seals (2) The options in this area are not available since you have already selected choices in the area. Use the "Get Results" button for your current choices.
- Water Pump Gaskets (2) The options in this area are not available since you have already selected choices in the area. Use the "Get Results" button for your current choices.
- Coolant Crossover Components (1) The options in this area are not available since you have already selected choices in the area. Use the "Get Results" button for your current choices.
- Water Neck Gaskets and O-Rings (1) The options in this area are not available since you have already selected choices in the area. Use the "Get Results" button for your current choices.
Make/Engine
Filter Options
- Made In USA (4)

Selected Filters

Filter Results by Vehicle

Loading...

Home
2004 GMC
Product Results

Availability

- In Stock Items, Including at a Supplier. Ships In a Few Days. (6) The options in this area are not available since you have already selected choices in the area. Use the "Get Results" button for your current choices.
- All Items, Including Not In Stock (6) The options in this area are not available since you have already selected choices in the area. Use the "Get Results" button for your current choices.
Filters
Make/Model
Department
- Fittings & Hoses
- Gaskets & Seals
Part Type
- Oil Cooler Gaskets and Seals (2) The options in this area are not available since you have already selected choices in the area. Use the "Get Results" button for your current choices.
- Water Pump Gaskets (2) The options in this area are not available since you have already selected choices in the area. Use the "Get Results" button for your current choices.
- Coolant Crossover Components (1) The options in this area are not available since you have already selected choices in the area. Use the "Get Results" button for your current choices.
- Water Neck Gaskets and O-Rings (1) The options in this area are not available since you have already selected choices in the area. Use the "Get Results" button for your current choices.
Make/Engine
Filter Options
- Made In USA (4)

Cometic

2004 GMC Cometic Parts and Accessories

Individual Parts

Part Groups

Results 1 - 6 of 6

Cometic Water Pump Gaskets C15032-031

Made in the USA

Cometic Water Pump Gaskets C15032-031

Cometic Water Pump Gaskets C15032-031

.031" F WATER PUMP GASKETS

Part Number: CGT-C15032-031

Not Yet Reviewed

Estimated Ship Date: May 8, 2026 if ordered today

...Loading

Estimated Ship Date: May 8, 2026 if ordered today

Cometic Oil Cooler Gaskets and Seals C15263

Cometic Oil Cooler Gaskets and Seals C15263

Cometic Oil Cooler Gaskets and Seals C15263

GM 2001+ 6.6L Duramax .020" Rubber Coated Stainless Oil Cooler Outlet Gasket

Part Number: CGT-C15263

Not Yet Reviewed

Estimated Ship Date: May 8, 2026 if ordered today

...Loading

Estimated Ship Date: May 8, 2026 if ordered today

Cometic Oil Cooler Gaskets and Seals C15264

Cometic Oil Cooler Gaskets and Seals C15264

Cometic Oil Cooler Gaskets and Seals C15264

GM 2001+ 6.6L Duramax .020" Rubber Coated Stainless Oil Cooler Inlet Gasket

Part Number: CGT-C15264

Not Yet Reviewed

Estimated Ship Date: May 8, 2026 if ordered today

...Loading

Estimated Ship Date: May 8, 2026 if ordered today

Cometic Water Pump Gaskets C15033

Made in the USA

Cometic Water Pump Gaskets C15033

Cometic Water Pump Gaskets C15033

WATER PUMP BACKING O-RING

Part Number: CGT-C15033

Not Yet Reviewed

Estimated Ship Date: May 8, 2026 if ordered today

...Loading

Estimated Ship Date: May 8, 2026 if ordered today

Cometic Coolant Crossover Components C15034

Made in the USA

Cometic Coolant Crossover Components C15034

Cometic Coolant Crossover Components C15034

COOLANT BYPASS SEALS - 4 PACK

Part Number: CGT-C15034

Not Yet Reviewed

Estimated Ship Date: May 8, 2026 if ordered today

...Loading

Estimated Ship Date: May 8, 2026 if ordered today

Cometic Water Neck Gaskets and O-Rings C15036

Made in the USA

Cometic Water Neck Gaskets and O-Rings C15036

Cometic Water Neck Gaskets and O-Rings C15036

THERMOSTAT HOUSING SEAL

Part Number: CGT-C15036

Not Yet Reviewed

Estimated Ship Date: May 8, 2026 if ordered today

...Loading

Estimated Ship Date: May 8, 2026 if ordered today

1

Page 1 of 1

Modal Header

Contact us with questions.

Call To Order

This is a custom order part. You can order this part by Contacting Us.

Summit Racing Speedcard. Synchrony Car Care.

Summit Racing Equipment SpeedCard

Jumpstart Your Next Project!

View Details|See if you Prequalify

Stay Updated with Emails from Summit Racing

Never miss a sale on new parts, tools, and more!

= Required

First Name

Last Name

Email Address Email required

See Our Catalogs

News & Events

News & Events Home
OnAllCylinders (blog)
Calendar of Events
New Product Releases
Summit Racing News
News You Can Use
Featured Vehicles
Media Center
Sanctioning Bodies

Help

Help Center
Return Policy
Beat-A-Price Guarantee
Payment Options
Contact Us

Social

Facebook
X/Twitter
Instagram
Pinterest
YouTube
Podcast

About Summit

Corporate History
Retail Locations

My Account

Profile
Email Preferences
Order Status & Returns
Wish List
Address Book
My Reviews
My Questions
My Garage
Sign In

Career Opportunities

More

Summit Racing Credit Card
Gift Cards
Calculators & Tools
Promo Exclusions
Become an Affiliate
Summit Racing Rewards Program
Summit Racing Equipment Protection Plan

Terms of Use | Privacy and Security | Site Accessibility
Copyright 2026 by AUTOSALES, INCORPORATED
dba Summit Racing Equipment | Trademarks

Let's Build it Together^™

Modal Header