Tensioner 12577655 For Cadillac
The DUHUI Bearing 12577655 drive belt tensioner is an OE-replacement component for Cadillac CTS, SRX, and STS models equipped with 3.6L and 2.8L V6 engines. This tensioner maintains proper serpentine belt tension across the accessory drive system, preventing belt slip and reducing wear on engine components. Manufactured to match original equipment specifications including 12577655, 19186933, and 38419, this tensioner delivers reliable performance for compatible General Motors vehicles.
Technical Specifications
| Specification | Value / Detail |
|---|---|
| DH Code | |
| Part Number | 12577655 |
| Product Type | Belt Tensioner |
| Pulley 1 Diameter | 70.00 mm (2.756 inch) |
| Pulley 1 Width | 27.00 mm (1.063 inch) |
| Bearing Bore Inside Diameter | 17.00 mm (0.669 inch) |
| Belt Type | Serpentine |
| Material | Steel / Aluminum Housing |
Important: All information on this page is for reference only. Please verify OE numbers, dimensions, and vehicle fitment against your original part before ordering. Contact us for fitment confirmation.
DH Code & OE Numbers & Reference Numbers
DH Code:
OE Numbers:
12577655, 19186933, 38419, 12577652, 19186932
Reference Numbers (Interchange):
SKP: SK89386
Dayco: 89387
Continental: 49390
Bando: 780175
ACDelco: 12577655
Vehicle Fitment
CADILLAC CTS: 2004-2009 (3.6L V6, 2.8L V6)
CADILLAC SRX: 2004-2009 (3.6L V6)
CADILLAC STS: 2005-2011 (3.6L V6)
Please verify OE number, dimensions and vehicle configuration before ordering.
Product Features
- OE-replacement belt tensioner for Cadillac CTS, SRX, STS 3.6L and 2.8L applications. Matches OEM specifications including 12577655, 19186933, and 38419.
- 70 mm pulley diameter and 27 mm width provide exact fitment for the accessory drive system.
- 17 mm bearing bore diameter matches original equipment specifications.
- Steel construction with aluminum housing ensures durability and consistent belt tension across the engine operating range.
Installation Notes
- Verify the 70 mm pulley diameter and 27 mm pulley width match your original tensioner before installation.
- Inspect the serpentine belt for wear or damage before installing the new tensioner.
- Torque the mounting bolt to manufacturer specifications (refer to service manual).
- After installation, verify proper belt tension and check for smooth operation.
- This tensioner is designed for serpentine belt systems – confirm belt routing matches your vehicle’s specific configuration.
About DUHUI Bearing
Manufactured by DUHUI Bearing – an automotive bearing supplier established in Zhejiang, China, in 2003. DUHUI produces tensioners and automotive bearings to OE specifications. Contact us
