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Dorman 34240 A/C Compressor Bypass Pulley
| Brand | Dorman 34240 |
|---|---|
| Belt Type | Serpentine |
| Compressor Type | Tsra12 |
| Installation Instructions Included | Yes |
| Material | Aluminum Bracket |
| Material | Plastic Pulley |
| Mounting Bracket Included | Yes |
| Mounting Hardware Included | Yes |
| Number of Pulleys Included | 1 |
| Outside Diameter | 103 |
| Package Contents | Pulley; Bracket; and Installation Hardware |
| Fits | Buick, Chevrolet, GMC, Saab, and Oldsmobile · 34 vehicles |
Bypass pulley. Lets the original drive belt stay in use while bypassing an inoperable A/C compressor.
Aluminum bracket. With a plastic pulley for a lightweight, practical replacement design.
Hardware included. Comes with the bracket and installation hardware for easier setup.
Cross-references 10366868 for the same application. See all 1.
Dorman 34240 A/C Compressor Bypass Pulley
Dorman 34240 is an A/C compressor bypass pulley for vehicles with an inoperable TSRA12 compressor. It lets the original serpentine drive belt stay in service while bypassing the failed compressor, making it a practical repair for select Buick Rainier, Chevrolet Trailblazer, GMC Envoy, and Saab 9-7x applications.
Key Features
- Aluminum bracket with a plastic pulley for a direct-fit bypass setup
- Outside diameter: 103 mm
- Built for serpentine belt routing
- Mounting bracket included for installation
- Mounting hardware included
- Installation instructions included
- For TSRA12 compressor applications
Product Details
This A/C compressor bypass pulley provides a cost-effective way to keep the accessory drive system operating when the air conditioning compressor has failed. Instead of replacing the compressor assembly, Dorman 34240 reroutes the serpentine belt around the inoperative unit while maintaining belt drive function. It is a practical solution for 2002-2007 Chevrolet Trailblazer, 2002-2007 GMC Envoy, 2004-2007 Buick Rainier, 2005-2007 Saab 9-7x, 2002-2006 Chevrolet Trailblazer EXT, 2002-2006 GMC Envoy XL, 2004-2005 GMC Envoy XUV, and 2002-2004 Oldsmobile Bravada models. This part cross-references 10366868 for the same application. Dorman 34240 is a direct-fit service part for owners looking for a bypass pulley for a failed A/C compressor on GM SUV platforms.
What It Helps Solve
- Broken or seized A/C compressor that prevents normal belt operation
- Serpentine belt routing issues caused by a locked compressor pulley
- Need to keep the engine accessory drive functioning without compressor replacement
- Noise or drag from an inoperable compressor assembly
- Temporary or permanent bypass repair on select GM and Saab SUVs
Installation Notes and Tips
Verify the vehicle uses a TSRA12 compressor and confirm belt routing before installation. Use the included bracket, pulley, hardware, and instructions to install the bypass assembly in place of the failed compressor path. For fitment, this part fits 2002-2007 Chevrolet Trailblazer, 2002-2007 GMC Envoy, and related applications listed above; confirm year and model before ordering. Dorman 34240 is intended for serpentine belt systems and should be matched to the original drive layout.
Quality Assurance
Dorman supplies service parts engineered to replace failed original components with application-specific fitment and included installation guidance. Part number 34240 is built with an aluminum bracket and plastic pulley for the listed compressor bypass application.
| Year | Make | Model | Liters | Cylinders | Position | Notes |
|---|---|---|---|---|---|---|
| 2007 | Buick | Rainier | 4.2L | L6 | N/A | — |
| 2007 | Chevrolet | Trailblazer | 4.2L | L6 | N/A | — |
| 2007 | GMC | Envoy | 4.2L | L6 | N/A | — |
| 2007 | Saab | 9-7x | 4.2L | L6 | N/A | — |
| 2006 | Buick | Rainier | 4.2L | L6 | N/A | — |
| 2006 | Chevrolet | Trailblazer | 4.2L | L6 | N/A | — |
| 2006 | Chevrolet | Trailblazer EXT | 4.2L | L6 | N/A | — |
| 2006 | GMC | Envoy | 4.2L | L6 | N/A | — |
| 2006 | GMC | Envoy XL | 4.2L | L6 | N/A | — |
| 2006 | Saab | 9-7x | 4.2L | L6 | N/A | — |
| 2005 | Buick | Rainier | 4.2L | L6 | N/A | — |
| 2005 | Chevrolet | Trailblazer | 4.2L | L6 | N/A | — |
| 2005 | Chevrolet | Trailblazer EXT | 4.2L | L6 | N/A | — |
| 2005 | GMC | Envoy | 4.2L | L6 | N/A | — |
| 2005 | GMC | Envoy XL | 4.2L | L6 | N/A | — |
| 2005 | GMC | Envoy XUV | 4.2L | L6 | N/A | — |
| 2005 | Saab | 9-7x | 4.2L | L6 | N/A | — |
| 2004 | Buick | Rainier | 4.2L | L6 | N/A | — |
| 2004 | Chevrolet | Trailblazer | 4.2L | L6 | N/A | — |
| 2004 | Chevrolet | Trailblazer EXT | 4.2L | L6 | N/A | — |
| 2004 | GMC | Envoy | 4.2L | L6 | N/A | — |
| 2004 | GMC | Envoy XL | 4.2L | L6 | N/A | — |
| 2004 | GMC | Envoy XUV | 4.2L | L6 | N/A | — |
| 2004 | Oldsmobile | Bravada | — | — | N/A | — |
| 2003 | Chevrolet | Trailblazer | 4.2L | L6 | N/A | — |
| 2003 | Chevrolet | Trailblazer EXT | 4.2L | L6 | N/A | — |
| 2003 | GMC | Envoy | 4.2L | L6 | N/A | — |
| 2003 | GMC | Envoy XL | 4.2L | L6 | N/A | — |
| 2003 | Oldsmobile | Bravada | — | — | N/A | — |
| 2002 | Chevrolet | Trailblazer | 4.2L | L6 | N/A | — |
| 2002 | Chevrolet | Trailblazer EXT | 4.2L | L6 | N/A | — |
| 2002 | GMC | Envoy | 4.2L | L6 | N/A | — |
| 2002 | GMC | Envoy XL | 4.2L | L6 | N/A | — |
| 2002 | Oldsmobile | Bravada | — | — | N/A | — |
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