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Dorman 740-690 Window Regulator - Front Left
Reliable Electric Window Regulator for Select GM and Isuzu Models
The Dorman 740-690 window regulator is designed to restore smooth window operation in various Buick, Chevrolet, GMC, Isuzu, Oldsmobile, and Saab vehicles. This electric window regulator offers a bolt-on installation and durable construction to ensure dependable performance.
Key Features of the Dorman 740-690 Window Regulator
- Gear material constructed from plastic for consistent movement
- Frame made from a combination of metal and plastic for strength and durability
- Bolt-on attachment type for straightforward installation
- Electric window operation type compatible with power window systems
- Includes one power regulator unit per package
- No motor or mounting hardware included
- Installation instructions are not included
Detailed Product Description
The Dorman 740-690 window regulator is engineered to replace faulty or worn-out window regulators in select models such as the Buick Rainier, Chevrolet Trailblazer, GMC Envoy, Isuzu Ascender, Oldsmobile Bravada, and Saab 9-7x. Its plastic gear material ensures smooth and quiet window movement, while the metal and plastic frame provides a balance of rigidity and lightweight design. This part is designed for electric window systems and requires a bolt-on installation method, making it compatible with factory mounting points. Note that this regulator does not include a motor or mounting hardware, so those components must be sourced separately if needed.
Common Issues Addressed by This Window Regulator
- Windows that fail to move up or down smoothly
- Intermittent or complete window operation failure
- Grinding or unusual noises during window movement
- Loose or misaligned window glass
- Broken or worn window regulator gears
Installation Notes and Tips
- Ensure compatibility with your vehicle’s make and model before installation
- Use appropriate tools for bolt-on attachment to avoid damage
- Since mounting hardware and motor are not included, verify existing components are in good condition or replace as necessary
- Professional installation is recommended if unfamiliar with power window systems
Quality Assurance and Warranty Information
Dorman parts are manufactured to meet or exceed OEM standards for fit and function. While specific warranty details for part number 740-690 are not provided, Dorman typically offers limited warranties covering defects in material and workmanship. Refer to Dorman’s official warranty policy for complete information.
| Brand | Dorman |
| Part Number | 740-690 |
| Attachment Type | Bolt On |
| Frame Material | Metal |
| Frame Material | Plastic |
| Installation Instructions Included | No |
| Motor Included | No |
| Mounting Hardware Included | No |
| Package Contents | 1 Power Regulator |
| Thread Direction | Plastic |
| Window Operation Type | Electric |
| Wire Quantity | 0 |
This part fits 46 vehicles. Search below:
| Year | Make | Model | Position | Notes |
|---|---|---|---|---|
| 2009 | Chevrolet | Trailblazer | Front Left | Fits power window regulation in various vehicle models. |
| 2009 | GMC | Envoy | Front Left | Fits power window regulation in various vehicle models. |
| 2009 | Saab | 9-7x | Front Left | Fits power window regulation in various vehicle models. |
| 2008 | Chevrolet | Trailblazer | Front Left | Fits power window regulation in various vehicle models. |
| 2008 | GMC | Envoy | Front Left | Fits power window regulation in various vehicle models. |
| 2008 | Isuzu | Ascender | Front Left | Fits power window regulation in various vehicle models. |
| 2008 | Saab | 9-7x | Front Left | Fits power window regulation in various vehicle models. |
| 2007 | Buick | Rainier | Front Left | Fits power window regulation in various vehicle models. |
| 2007 | Chevrolet | Trailblazer | Front Left | Fits power window regulation in various vehicle models. |
| 2007 | GMC | Envoy | Front Left | Fits power window regulation in various vehicle models. |
| 2007 | Isuzu | Ascender | Front Left | Fits power window regulation in various vehicle models. |
| 2007 | Saab | 9-7x | Front Left | Fits power window regulation in various vehicle models. |
| 2006 | Buick | Rainier | Front Left | Fits power window regulation in various vehicle models. |
| 2006 | Chevrolet | Trailblazer | Front Left | Fits power window regulation in various vehicle models. |
| 2006 | Chevrolet | Trailblazer EXT | Front Left | Fits power window regulation in various vehicle models. |
| 2006 | GMC | Envoy | Front Left | Fits power window regulation in various vehicle models. |
| 2006 | GMC | Envoy XL | Front Left | Fits power window regulation in various vehicle models. |
| 2006 | Isuzu | Ascender | Front Left | Fits power window regulation in various vehicle models. |
| 2006 | Saab | 9-7x | Front Left | Fits power window regulation in various vehicle models. |
| 2005 | Buick | Rainier | Front Left | Fits power window regulation in various vehicle models. |
| 2005 | Chevrolet | Trailblazer | Front Left | Fits power window regulation in various vehicle models. |
| 2005 | Chevrolet | Trailblazer EXT | Front Left | Fits power window regulation in various vehicle models. |
| 2005 | GMC | Envoy | Front Left | Fits power window regulation in various vehicle models. |
| 2005 | GMC | Envoy XL | Front Left | Fits power window regulation in various vehicle models. |
| 2005 | GMC | Envoy XUV | Front Left | Fits power window regulation in various vehicle models. |
| 2005 | Isuzu | Ascender | Front Left | Fits power window regulation in various vehicle models. |
| 2005 | Saab | 9-7x | Front Left | Fits power window regulation in various vehicle models. |
| 2004 | Buick | Rainier | Front Left | Fits power window regulation in various vehicle models. |
| 2004 | Chevrolet | Trailblazer | Front Left | Fits power window regulation in various vehicle models. |
| 2004 | Chevrolet | Trailblazer EXT | Front Left | Fits power window regulation in various vehicle models. |
| 2004 | GMC | Envoy | Front Left | Fits power window regulation in various vehicle models. |
| 2004 | GMC | Envoy XL | Front Left | Fits power window regulation in various vehicle models. |
| 2004 | GMC | Envoy XUV | Front Left | Fits power window regulation in various vehicle models. |
| 2004 | Isuzu | Ascender | Front Left | Fits power window regulation in various vehicle models. |
| 2004 | Oldsmobile | Bravada | Front Left | Fits power window regulation in various vehicle models. |
| 2003 | Chevrolet | Trailblazer | Front Left | Fits power window regulation in various vehicle models. |
| 2003 | Chevrolet | Trailblazer EXT | Front Left | Fits power window regulation in various vehicle models. |
| 2003 | GMC | Envoy | Front Left | Fits power window regulation in various vehicle models. |
| 2003 | GMC | Envoy XL | Front Left | Fits power window regulation in various vehicle models. |
| 2003 | Isuzu | Ascender | Front Left | Fits power window regulation in various vehicle models. |
| 2003 | Oldsmobile | Bravada | Front Left | Fits power window regulation in various vehicle models. |
| 2002 | Chevrolet | Trailblazer | Front Left | Fits power window regulation in various vehicle models. |
| 2002 | Chevrolet | Trailblazer EXT | Front Left | Fits power window regulation in various vehicle models. |
| 2002 | GMC | Envoy | Front Left | Fits power window regulation in various vehicle models. |
| 2002 | GMC | Envoy XL | Front Left | Fits power window regulation in various vehicle models. |
| 2002 | Oldsmobile | Bravada | Front Left | Fits power window regulation in various vehicle models. |
* 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.