OE Quality
60-Day Returns

Gates 38419 Accessory Drive Belt Tensioner Assembly - Air Conditioning
Overview of Gates DriveAlign Premium OE Automatic Belt Tensioner
The Gates DriveAlign Premium OE Automatic Belt Tensioner (part number 38419) is engineered to maintain optimal tension on the accessory drive belt system. Designed specifically for Cadillac CTS, SRX, and STS models, this tensioner assembly ensures consistent belt performance and longevity.
- Constructed from durable steel for strength and reliability
- Compatible with V-ribbed belt types used in select Cadillac vehicles
- Single pulley design with a smooth backside contact surface
- Mounting hole quantity: 1 for straightforward installation
- Precision dimensions: 2.76 inches (70 mm) outside diameter, 1.22 inches (31 mm) width, and 0.67 inches (17 mm) bearing bore inside diameter
Detailed Product Features and Specifications
This accessory drive belt tensioner assembly features a steel construction that provides durability under continuous engine operation. The pulley is not flanged, which suits the V-ribbed belt system found in Cadillac CTS, SRX, and STS models. The tensioner’s smooth backside contact surface reduces belt wear and noise. With a single mounting hole, installation is simplified without compromising secure fitment. The precise dimensions, including a 2.76-inch outside diameter and 1.22-inch width, align with original equipment specifications, ensuring an OE exact replacement.
About the DriveAlign Premium OE Automatic Belt Tensioner Line
The DriveAlign Premium OE Automatic Belt Tensioner product line by Gates focuses on delivering tensioners that meet original equipment standards. This line emphasizes exact fitment and reliable performance, making it suitable for professional repairs and maintenance. Part number 38419 is part of this line, providing Cadillac owners with a tensioner assembly designed to match factory specifications and maintain proper belt tension automatically.
Applications and Common Issues Addressed
- Maintains proper tension on the accessory drive belt to prevent slippage
- Reduces belt noise caused by improper tension or misalignment
- Prevents premature belt wear and extends belt life
- Eliminates issues related to belt squeal during engine start-up or acceleration
- Supports smooth operation of engine accessories such as alternator and power steering pump
Installation Notes and Tips
When installing the Gates DriveAlign Premium OE Automatic Belt Tensioner 38419, ensure the mounting surface is clean and free of debris. Use the single mounting hole to secure the tensioner firmly in place. Verify that the V-ribbed belt is properly seated on the pulley with the smooth backside contact surface aligned correctly. It is recommended to inspect the belt for wear and replace if necessary during installation. Follow vehicle-specific torque specifications to avoid over-tightening.
Quality Assurance and Warranty
Gates provides this tensioner assembly with an OE comparison rating, confirming it meets original equipment standards for fit and function. Manufactured from high-quality steel and precision components, part number 38419 is built for durability and consistent performance. Warranty details are available through Gates and typically cover defects in material and workmanship under normal use conditions.
| Brand | Gates |
| Part Number | 38419 |
| Position | DriveAlign Premium OE Automatic Belt Tensioner, Air Conditioning |
| Bearing Bore Inside Diameter | .67 |
| Bearing Bore Inside Diameter | 17 |
| Bearing Bore Inside Diameter 1 (in) | .67 |
| Bearing Bore Inside Diameter 1 (mm) | 17 |
| Belt Type | V-Ribbed |
| Belt Type | V-Ribbed |
| Contact Surface | Smooth/Backside |
| Contents | Tensioner Assy. |
| Material | Steel |
| Mounting Hole Quantity | 1 |
| OE Comparison Rating | OE Exact |
| Outside Diameter | 2.76 |
| Outside Diameter | 70 |
| Outside Diameter (in) | 2.76 |
| Outside Diameter (mm) | 70 |
| Pulley 1 Flanged | No |
| Pulley 1 Flanged | No |
| Pulley Quantity | 1 |
| Width | 1.22 |
| Width | 31 |
| Width (in) | 1.22 |
| Width (mm) | 31 |
This part fits 22 vehicles. Search below:
| Year | Make | Model | Liters | Cylinders | Fuel Type | Position | Notes |
|---|---|---|---|---|---|---|---|
| 2011 | Cadillac | STS | 3.6L | V6 | GAS | Air Conditioning | DriveAlign Premium OE Automatic Belt Tensioner |
| 2010 | Cadillac | STS | 3.6L | V6 | GAS | Air Conditioning | DriveAlign Premium OE Automatic Belt Tensioner |
| 2009 | Cadillac | CTS | 3.6L | V6 | GAS | Air Conditioning | DriveAlign Premium OE Automatic Belt Tensioner |
| 2009 | Cadillac | SRX | 3.6L | V6 | GAS | Air Conditioning | DriveAlign Premium OE Automatic Belt Tensioner |
| 2009 | Cadillac | STS | 3.6L | V6 | GAS | Air Conditioning | DriveAlign Premium OE Automatic Belt Tensioner |
| 2008 | Cadillac | CTS | 3.6L | V6 | GAS | Air Conditioning | DriveAlign Premium OE Automatic Belt Tensioner |
| 2008 | Cadillac | SRX | 3.6L | V6 | GAS | Air Conditioning | DriveAlign Premium OE Automatic Belt Tensioner |
| 2008 | Cadillac | STS | 3.6L | V6 | GAS | Air Conditioning | DriveAlign Premium OE Automatic Belt Tensioner |
| 2007 | Cadillac | CTS | 2.8L | V6 | GAS | Air Conditioning | DriveAlign Premium OE Automatic Belt Tensioner |
| 2007 | Cadillac | CTS | 3.6L | V6 | GAS | Air Conditioning | DriveAlign Premium OE Automatic Belt Tensioner |
| 2007 | Cadillac | SRX | 3.6L | V6 | GAS | Air Conditioning | DriveAlign Premium OE Automatic Belt Tensioner |
| 2007 | Cadillac | STS | 3.6L | V6 | GAS | Air Conditioning | DriveAlign Premium OE Automatic Belt Tensioner |
| 2006 | Cadillac | CTS | 2.8L | V6 | GAS | Air Conditioning | DriveAlign Premium OE Automatic Belt Tensioner |
| 2006 | Cadillac | CTS | 3.6L | V6 | GAS | Air Conditioning | DriveAlign Premium OE Automatic Belt Tensioner |
| 2006 | Cadillac | SRX | 3.6L | V6 | GAS | Air Conditioning | DriveAlign Premium OE Automatic Belt Tensioner |
| 2006 | Cadillac | STS | 3.6L | V6 | GAS | Air Conditioning | DriveAlign Premium OE Automatic Belt Tensioner |
| 2005 | Cadillac | CTS | 2.8L | V6 | GAS | Air Conditioning | DriveAlign Premium OE Automatic Belt Tensioner |
| 2005 | Cadillac | CTS | 3.6L | V6 | GAS | Air Conditioning | DriveAlign Premium OE Automatic Belt Tensioner |
| 2005 | Cadillac | SRX | 3.6L | V6 | GAS | Air Conditioning | DriveAlign Premium OE Automatic Belt Tensioner |
| 2005 | Cadillac | STS | 3.6L | V6 | GAS | Air Conditioning | DriveAlign Premium OE Automatic Belt Tensioner |
| 2004 | Cadillac | CTS | 3.6L | V6 | GAS | Air Conditioning | DriveAlign Premium OE Automatic Belt Tensioner |
| 2004 | Cadillac | SRX | 3.6L | V6 | GAS | Air Conditioning | DriveAlign Premium OE Automatic Belt Tensioner |
* 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.