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Dayco 71949 Radiator Coolant Hose - Upper
| Brand | Dayco 71949 |
|---|---|
| Position | Upper |
| Color | Black |
| End 1 Inside Diameter | 1 1/4 |
| End 2 Inside Diameter | 1 1/4 |
| Hose Type | Single I.D. Hose |
| Material | EPDM |
| SAE Specification | SAE J20R4 Class D-1, SAE J1684 Type EC |
| Trunk Height | 15 |
| Product line | Curved Radiator Hose |
| Fits | Buick, Chevrolet, Pontiac, and Oldsmobile · 29 vehicles |
Curved radiator hose. Single I.D. hose for smooth coolant flow and a clean fit.
EPDM construction. Resists heat and coolant exposure for dependable service.
SAE-rated design. Built to meet SAE J20R4 Class D-1 and SAE J1684 Type EC.
Cross-references ACDelco 26351X, CARQUEST 22361 and Duralast D71949 for the same application. See all 14.
Curved Upper Radiator Hose for GM Applications
Dayco 71949 is a curved radiator coolant hose made from EPDM for upper cooling-system routing. It features a 1 1/4 in. inside diameter at both ends and is built to SAE J20R4 Class D-1 and SAE J1684 Type EC specifications for the listed applications.
This Dayco Curved Radiator Hose line is built for direct-fit cooling system service where a formed hose is needed to follow the factory routing. For Buick Rendezvous, Pontiac Aztek, Pontiac Montana, Oldsmobile Silhouette, and Pontiac Trans Sport applications, the curved shape helps match the original upper hose path.
Key Features
- Part number: 71949
- EPDM construction for coolant hose service
- Black finish
- Single I.D. hose design
- 1 1/4 in. inside diameter at both ends
- Upper radiator hose application
- Built to SAE J20R4 Class D-1 and SAE J1684 Type EC standards
- Compatible with 2002-2007 Buick Rendezvous, upper
- Compatible with 2001-2005 Pontiac Aztek, upper
- Compatible with 1999-2005 Pontiac Montana, upper
- Compatible with 1997-2004 Oldsmobile Silhouette, upper
- Compatible with 1997-1999 Pontiac Trans Sport, upper
Detailed Description
Dayco 71949 is a curved radiator coolant hose for upper hose routing in select GM minivan and crossover applications. The EPDM rubber construction is suited for coolant transfer, while the formed profile supports factory-style routing in vehicles such as the Buick Rendezvous, Pontiac Aztek, Pontiac Montana, Oldsmobile Silhouette, and Pontiac Trans Sport. This part cross-references Gates 22361 for the same application.
Use Dayco 71949 when replacing a worn, cracked, softened, or leaking upper radiator hose. The 1 1/4 in. end diameters and curved shape make it a direct-match service part for the listed vehicles, including 2002-2007 Buick Rendezvous and 2001-2005 Pontiac Aztek upper radiator hose applications.
What It Helps Fix
- Coolant leaks from a cracked upper radiator hose
- Softening or swelling from heat and age
- Restricted coolant flow caused by hose collapse
- Improper routing after a failed hose replacement
- Loss of cooling-system integrity at the radiator connection
Installation Notes and Tips
Verify the hose diameter, routing, and position before installation. Match the upper hose path to the original layout and inspect adjoining clamps, radiator necks, and engine fittings for wear or corrosion. Drain coolant as needed before removing the old hose, then confirm the hose seats fully on both ends and follows the factory curve without twisting.
Quality Assurance
Dayco manufactures this hose to meet SAE J20R4 Class D-1 and SAE J1684 Type EC requirements for the specified cooling-system applications. The EPDM construction and formed design support consistent fitment for the listed GM vehicles.
| Year | Make | Model | Liters | Cylinders | Position | Notes |
|---|---|---|---|---|---|---|
| 2007 | Buick | Rendezvous | — | — | Upper | Curved Radiator Hose |
| 2006 | Buick | Rendezvous | 3.5L | V6 | Upper | Curved Radiator Hose |
| 2005 | Buick | Rendezvous | 3.4L | V6 | Upper | Curved Radiator Hose |
| 2005 | Pontiac | Aztek | — | — | Upper | Curved Radiator Hose |
| 2005 | Pontiac | Montana | 3.4L | V6 | Upper | Curved Radiator Hose |
| 2004 | Buick | Rendezvous | 3.4L | V6 | Upper | Curved Radiator Hose |
| 2004 | Oldsmobile | Silhouette | — | — | Upper | Curved Radiator Hose |
| 2004 | Pontiac | Aztek | — | — | Upper | Curved Radiator Hose |
| 2004 | Pontiac | Montana | — | — | Upper | Curved Radiator Hose |
| 2003 | Buick | Rendezvous | — | — | Upper | Curved Radiator Hose |
| 2003 | Oldsmobile | Silhouette | — | — | Upper | Curved Radiator Hose |
| 2003 | Pontiac | Aztek | — | — | Upper | Curved Radiator Hose |
| 2003 | Pontiac | Montana | — | — | Upper | Curved Radiator Hose |
| 2002 | Buick | Rendezvous | — | — | Upper | Curved Radiator Hose |
| 2002 | Oldsmobile | Silhouette | — | — | Upper | Curved Radiator Hose |
| 2002 | Pontiac | Aztek | — | — | Upper | Curved Radiator Hose |
| 2002 | Pontiac | Montana | — | — | Upper | Curved Radiator Hose |
| 2001 | Oldsmobile | Silhouette | — | — | Upper | Curved Radiator Hose |
| 2001 | Pontiac | Aztek | — | — | Upper | Curved Radiator Hose |
| 2001 | Pontiac | Montana | — | — | Upper | Curved Radiator Hose |
| 2000 | Oldsmobile | Silhouette | — | — | Upper | Curved Radiator Hose |
| 2000 | Pontiac | Montana | — | — | Upper | Curved Radiator Hose |
| 1999 | Oldsmobile | Silhouette | — | — | Upper | Curved Radiator Hose |
| 1999 | Pontiac | Montana | — | — | Upper | Curved Radiator Hose |
| 1999 | Pontiac | Trans Sport | — | — | Upper | Curved Radiator Hose |
| 1998 | Oldsmobile | Silhouette | — | — | Upper | Curved Radiator Hose |
| 1998 | Pontiac | Trans Sport | — | — | Upper | Curved Radiator Hose |
| 1997 | Oldsmobile | Silhouette | — | — | Upper | Curved Radiator Hose |
| 1997 | Pontiac | Trans Sport | — | — | Upper | Curved Radiator Hose |
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