My Account
My Garage
Shopping Cart

Shopping Cart

0 items in your Cart
View Cart
Subtotal
Track
My Order
MY GARAGE Select Vehicle
MY GARAGE

Gates 20603 Upper Radiator Coolant Hose 19.6 Inch Curved

(GMC G2500 1979-82, G25/G2500 Van 1972-82, G3500 1979-82, G1500 1979-82, G35 1975-78, G15/G1500 Van 1972-82, G35/G3500 Van 1972-82, G25 1975-78 + 61 more models)

Part of: Gates Radiator Coolant Hose

Other options in this family: Gates 05-2842 Gates 24026 Gates 22963 Gates 23276 Gates 22896

Manufacturer

Picture for manufacturer Gates

Part Number

20603
4 reviews
Sale Price

$15.49

In Stock (7)

delivery box

Usually delivered within 2 days

Check out with

ApplePay
Authorize Seller Badge
No Hassle Returns

No Hassle Returns

Live-in-stock inventory

Live-in-stock inventory

Fitment guaranteed

Fitment guaranteed

Product Details

The Gates 20603 is a premium curved radiator coolant hose engineered for reliable engine cooling system performance. This OE replacement upper radiator hose features precision-molded construction designed to meet or exceed original equipment specifications.

Key Specifications:

  • Centerline length: 19.6 inches
  • Inner diameter: 1.5 inches x 1.75 inches (tapered design)
  • Position: Upper radiator hose
  • Color: Black EPDM rubber construction
  • Curved design for precise OE fitment

Features and Benefits:

  • High-quality EPDM rubber compound resists heat, ozone, and coolant degradation
  • Reinforced construction prevents collapse under vacuum conditions
  • Precision-molded to exact OE specifications for proper fit and seal
  • Electrochemical degradation (ECD) resistant materials for extended service life
  • Backed by Gates lifetime limited warranty

Each Gates coolant hose is manufactured to strict quality standards and undergoes rigorous testing to ensure reliable performance in demanding engine bay environments. The curved design eliminates the need for custom bending and ensures proper coolant flow between the engine and radiator.

Products specifications

Fits

GMC G2500 1979-82, G25/G2500 Van 1972-82, G3500 1979-82, G1500 1979-82, G35 1975-78, G15/G1500 Van 1972-82, G35/G3500 Van 1972-82, G25 1975-78, Sprint 1971-73, G15 1975-78, Giulia Sprint 1971-73; Chevrolet Impala 1971-73, Malibu 1973 + 56 more models

Centerline Length (in)

19.6

Centerline Length (mm)

498

Contains Spring

No

Inside Diameter 1 (in)

1.5

Inside Diameter 1 (mm)

38

Inside Diameter 2 (in)

1.75

Inside Diameter 2 (mm)

44

Number of Branches

0

Everything has been quick and easy

Fast ship, great price. I will purchase merchandise from them again.

Overall very good, fast service. Will shop there again.

Shopped around and Autoplicity had the best price by far on the BOV for my car. Shipping was fast, very satisfied!

Share icon
Return Policy
Returns are easy at THMotorsports

Not happy with a purchase? No problem. We've made returning items as easy as possible. And most purchases can be returned for free for 30 days. Learn more about our Returns Policy