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Gates 21718 Radiator Coolant Hose - Lower
Overview of Gates Molded Coolant Hose 21718
The Gates Molded Coolant Hose 21718 is designed for reliable cooling system performance in select Chevrolet and GMC trucks and vans. Engineered with durable EPDM and plastic materials, this radiator coolant hose ensures proper coolant flow and system integrity for vehicles like the Chevrolet C1500 and GMC G20.
- Constructed from EPDM and plastic for heat and chemical resistance
- Molded design for precise fit and secure installation
- End 1 inside diameter: 1.5 inches (38 mm)
- End 2 inside diameter: 1.73 inches (44 mm)
- Centerline length: 28.1 inches (714 mm)
- Compatible with Chevrolet C1500, C2500, GMC G10, G20, G30, K1500, and K2500 models
- Part number 21718 for accurate identification
About the Molded Coolant Hose Product Line
The Gates Molded Coolant Hose line focuses on precision-molded radiator hoses that provide consistent coolant flow and fitment accuracy. This product line utilizes high-quality EPDM rubber and plastic components to withstand the thermal and chemical demands of automotive cooling systems. The molded construction reduces the risk of leaks and improves durability compared to generic hoses.
Detailed Product Description
The Gates Molded Coolant Hose 21718 features a molded design that matches the original equipment specifications for select Chevrolet and GMC trucks and vans. Its EPDM and plastic construction offers resistance to heat, ozone, and coolant chemicals, ensuring long service life. The hose has two different inside diameters—1.5 inches (38 mm) on one end and 1.73 inches (44 mm) on the other—allowing it to connect seamlessly between components with varying sizes. With a centerline length of 28.1 inches (714 mm), this hose fits precisely within the engine bay layout of compatible vehicles. The hose does not contain any springs or quick connect fittings, simplifying installation and maintenance.
Common Applications and Issues Addressed
- Replacement of worn or cracked radiator coolant hoses in Chevrolet C1500 and GMC K2500 trucks
- Resolving coolant leaks caused by hose degradation or swelling
- Maintaining proper coolant flow to prevent engine overheating
- Restoring cooling system integrity in GMC G10 and Chevrolet C2500 vans
- Upgrading aging hoses to maintain factory fit and performance
Installation Notes and Tips
- Ensure the engine is cool before removing the old hose to avoid burns
- Check hose clamps and replace if corroded or damaged
- Verify the correct orientation of the hose based on the molded shape
- Inspect surrounding components for wear or damage during installation
- Tighten clamps securely to prevent leaks but avoid overtightening
Quality Assurance and Warranty
Gates Molded Coolant Hose 21718 is manufactured to meet or exceed OEM standards for durability and fitment. The use of EPDM and plastic materials ensures resistance to heat and coolant chemicals, contributing to long-term reliability. While specific warranty details may vary, Gates typically offers coverage against manufacturing defects to support product confidence.
| Brand | Gates |
|---|---|
| Part Number | 21718 |
| Position | Molded Coolant Hose, Lower |
| 0 | |
| Yes | |
| Branch Quantity | 0 |
| Centerline Length | 28.1 |
| Centerline Length | 714 |
| Contains Spring | No |
| End 1 Inside Diameter | 1.5 |
| End 1 Inside Diameter | 38 |
| End 2 Inside Diameter | 1.73 |
| End 2 Inside Diameter | 44 |
| Material | EPDM, Plastic |
| Modular Hose | No |
| Molded | Yes |
| Number of Quick Connect Fittings | 0 |
This part fits 72 vehicles. Search below:
| Year | Make | Model | Drive Type | Liters | Cylinders | Fuel Type | Position | Notes |
|---|---|---|---|---|---|---|---|---|
| 1995 | Chevrolet | G10 | 4.3L | V6 | GAS | Lower | HVAC heater hose with A/C, fits Serpentine Belt application.; Molded Coolant Hose | |
| 1995 | Chevrolet | G20 | 4.3L | V6 | GAS | Lower | HVAC heater hose with A/C, fits Serpentine Belt application.; Molded Coolant Hose | |
| 1995 | Chevrolet | G30 | 4.3L | V6 | GAS | Lower | HVAC heater hose with A/C, fits Serpentine Belt application.; Molded Coolant Hose | |
| 1995 | GMC | G1500 | 4.3L | V6 | GAS | Lower | HVAC heater hose with A/C, fits Serpentine Belt application.; Molded Coolant Hose | |
| 1995 | GMC | G2500 | 4.3L | V6 | GAS | Lower | HVAC heater hose with A/C, fits Serpentine Belt application.; Molded Coolant Hose | |
| 1995 | GMC | G3500 | 4.3L | V6 | GAS | Lower | HVAC heater hose with A/C, fits Serpentine Belt application.; Molded Coolant Hose | |
| 1994 | Chevrolet | G10 | 4.3L | V6 | GAS | Lower | HVAC heater hose with A/C, fits Serpentine Belt application.; Molded Coolant Hose | |
| 1994 | Chevrolet | G20 | 4.3L | V6 | GAS | Lower | HVAC heater hose with A/C, fits Serpentine Belt application.; Molded Coolant Hose | |
| 1994 | Chevrolet | G30 | 4.3L | V6 | GAS | Lower | HVAC heater hose with A/C, fits Serpentine Belt application.; Molded Coolant Hose | |
| 1994 | GMC | G1500 | 4.3L | V6 | GAS | Lower | HVAC heater hose with A/C, fits Serpentine Belt application.; Molded Coolant Hose | |
| 1994 | GMC | G2500 | 4.3L | V6 | GAS | Lower | HVAC heater hose with A/C, fits Serpentine Belt application.; Molded Coolant Hose | |
| 1994 | GMC | G3500 | 4.3L | V6 | GAS | Lower | HVAC heater hose with A/C, fits Serpentine Belt application.; Molded Coolant Hose | |
| 1993 | Chevrolet | C1500 | 4.3L | V6 | GAS | Lower | Molded Coolant Hose | |
| 1993 | Chevrolet | C2500 | 4.3L | V6 | GAS | Lower | Molded Coolant Hose | |
| 1993 | Chevrolet | G10 | 4.3L | V6 | GAS | Lower | HVAC heater hose with A/C, fits Serpentine Belt application.; Molded Coolant Hose | |
| 1993 | Chevrolet | G20 | 4.3L | V6 | GAS | Lower | HVAC heater hose with A/C, fits Serpentine Belt application.; Molded Coolant Hose | |
| 1993 | Chevrolet | G30 | 4.3L | V6 | GAS | Lower | HVAC heater hose with A/C, fits Serpentine Belt application.; Molded Coolant Hose | |
| 1993 | Chevrolet | K1500 | 4.3L | V6 | GAS | Lower | Molded Coolant Hose | |
| 1993 | Chevrolet | K2500 | 4.3L | V6 | GAS | Lower | Molded Coolant Hose | |
| 1993 | GMC | C1500 | 4.3L | V6 | GAS | Lower | Molded Coolant Hose | |
| 1993 | GMC | C2500 | 4.3L | V6 | GAS | Lower | Molded Coolant Hose | |
| 1993 | GMC | G1500 | 4.3L | V6 | GAS | Lower | HVAC heater hose with A/C, fits Serpentine Belt application.; Molded Coolant Hose | |
| 1993 | GMC | G2500 | 4.3L | V6 | GAS | Lower | HVAC heater hose with A/C, fits Serpentine Belt application.; Molded Coolant Hose | |
| 1993 | GMC | G3500 | 4.3L | V6 | GAS | Lower | HVAC heater hose with A/C, fits Serpentine Belt application.; Molded Coolant Hose | |
| 1993 | GMC | K1500 | 4.3L | V6 | GAS | Lower | Molded Coolant Hose | |
| 1993 | GMC | K2500 | 4.3L | V6 | GAS | Lower | Molded Coolant Hose | |
| 1992 | Chevrolet | C1500 | 4.3L | V6 | GAS | Lower | Radiator and HVAC compatible coolant and heater hose.; Molded Coolant Hose | |
| 1992 | Chevrolet | C2500 | 4.3L | V6 | GAS | Lower | Radiator and HVAC compatible coolant and heater hose.; Molded Coolant Hose | |
| 1992 | Chevrolet | G10 | 4.3L | V6 | GAS | Lower | HVAC heater hose with A/C, fits Serpentine Belt application.; Molded Coolant Hose | |
| 1992 | Chevrolet | G20 | 4.3L | V6 | GAS | Lower | HVAC heater hose with A/C, fits Serpentine Belt application.; Molded Coolant Hose | |
| 1992 | Chevrolet | G30 | 4.3L | V6 | GAS | Lower | HVAC heater hose with A/C, fits Serpentine Belt application.; Molded Coolant Hose | |
| 1992 | Chevrolet | K1500 | 4WD | 4.3L | V6 | GAS | Lower | Molded Coolant Hose |
| 1992 | Chevrolet | K2500 | 4WD | 4.3L | V6 | GAS | Lower | Molded Coolant Hose |
| 1992 | GMC | C1500 | 4.3L | V6 | GAS | Lower | Radiator and HVAC compatible coolant and heater hose.; Molded Coolant Hose | |
| 1992 | GMC | C2500 | 4.3L | V6 | GAS | Lower | Radiator and HVAC compatible coolant and heater hose.; Molded Coolant Hose | |
| 1992 | GMC | G1500 | 4.3L | V6 | GAS | Lower | HVAC heater hose with A/C, fits Serpentine Belt application.; Molded Coolant Hose | |
| 1992 | GMC | G2500 | 4.3L | V6 | GAS | Lower | HVAC heater hose with A/C, fits Serpentine Belt application.; Molded Coolant Hose | |
| 1992 | GMC | G3500 | 4.3L | V6 | GAS | Lower | HVAC heater hose with A/C, fits Serpentine Belt application.; Molded Coolant Hose | |
| 1992 | GMC | K1500 | 4WD | 4.3L | V6 | GAS | Lower | Molded Coolant Hose |
| 1992 | GMC | K2500 | 4WD | 4.3L | V6 | GAS | Lower | Molded Coolant Hose |
| 1991 | Chevrolet | C1500 | 4.3L | V6 | GAS | Lower | Radiator and HVAC compatible coolant and heater hose.; Molded Coolant Hose | |
| 1991 | Chevrolet | C2500 | 4.3L | V6 | GAS | Lower | Radiator and HVAC compatible coolant and heater hose.; Molded Coolant Hose | |
| 1991 | Chevrolet | K1500 | 4WD | 4.3L | V6 | GAS | Lower | Molded Coolant Hose |
| 1991 | Chevrolet | K2500 | 4WD | 4.3L | V6 | GAS | Lower | Molded Coolant Hose |
| 1991 | GMC | C1500 | 4.3L | V6 | GAS | Lower | Radiator and HVAC compatible coolant and heater hose.; Molded Coolant Hose | |
| 1991 | GMC | C2500 | 4.3L | V6 | GAS | Lower | Radiator and HVAC compatible coolant and heater hose.; Molded Coolant Hose | |
| 1991 | GMC | K1500 | 4WD | 4.3L | V6 | GAS | Lower | Molded Coolant Hose |
| 1991 | GMC | K2500 | 4WD | 4.3L | V6 | GAS | Lower | Molded Coolant Hose |
| 1990 | Chevrolet | C1500 | 4.3L | V6 | GAS | Lower | Molded Coolant Hose | |
| 1990 | Chevrolet | C2500 | 4.3L | V6 | GAS | Lower | Molded Coolant Hose | |
| 1990 | Chevrolet | K1500 | 4.3L | V6 | GAS | Lower | Molded Coolant Hose | |
| 1990 | Chevrolet | K2500 | 4.3L | V6 | GAS | Lower | Molded Coolant Hose | |
| 1990 | GMC | C1500 | 4.3L | V6 | GAS | Lower | Molded Coolant Hose | |
| 1990 | GMC | C2500 | 4.3L | V6 | GAS | Lower | Molded Coolant Hose | |
| 1990 | GMC | K1500 | 4.3L | V6 | GAS | Lower | Molded Coolant Hose | |
| 1990 | GMC | K2500 | 4.3L | V6 | GAS | Lower | Molded Coolant Hose | |
| 1989 | Chevrolet | C1500 | 4.3L | V6 | GAS | Lower | Molded Coolant Hose | |
| 1989 | Chevrolet | C2500 | 4.3L | V6 | GAS | Lower | Molded Coolant Hose | |
| 1989 | Chevrolet | K1500 | 4.3L | V6 | GAS | Lower | Molded Coolant Hose | |
| 1989 | Chevrolet | K2500 | 4.3L | V6 | GAS | Lower | Molded Coolant Hose | |
| 1989 | GMC | C1500 | 4.3L | V6 | GAS | Lower | Molded Coolant Hose | |
| 1989 | GMC | C2500 | 4.3L | V6 | GAS | Lower | Molded Coolant Hose | |
| 1989 | GMC | K1500 | 4.3L | V6 | GAS | Lower | Molded Coolant Hose | |
| 1989 | GMC | K2500 | 4.3L | V6 | GAS | Lower | Molded Coolant Hose | |
| 1988 | Chevrolet | C1500 | 4.3L | V6 | GAS | Lower | Molded Coolant Hose | |
| 1988 | Chevrolet | C2500 | 4.3L | V6 | GAS | Lower | Molded Coolant Hose | |
| 1988 | Chevrolet | K1500 | 4.3L | V6 | GAS | Lower | Molded Coolant Hose | |
| 1988 | Chevrolet | K2500 | 4.3L | V6 | GAS | Lower | Molded Coolant Hose | |
| 1988 | GMC | C1500 | 4.3L | V6 | GAS | Lower | Molded Coolant Hose | |
| 1988 | GMC | C2500 | 4.3L | V6 | GAS | Lower | Molded Coolant Hose | |
| 1988 | GMC | K1500 | 4.3L | V6 | GAS | Lower | Molded Coolant Hose | |
| 1988 | GMC | K2500 | 4.3L | V6 | GAS | Lower | Molded Coolant Hose |
* Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.
This part directly replaces or is cross-referenced with the following part numbers:
Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.