Dorman 674-785 Right Exhaust Manifold 03-12 GMC Envoy XUV Envoy XL Hummer H3 H3T
Confirm Fitment Before You Buy
Not sure it fits? Message Year/Make/Model/Engine (2WD/4WD if applicable) and we’ll help confirm compatibility.
Why buy from Koskowski Automotive?
• 50+ years (since 1972) • Dorman Authorized Seller • Fast shipping • Easy returns
Regular price
$193.70
Select your vehicle at the top of the page to check fitment.
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Vehicle Fitment: Use the table below to match your exact configuration. If you don’t see your exact setup, message us before ordering.
This exhaust manifold was precision-engineered and durably manufactured to match the fit and function of the original manifold on specified vehicles. It includes all necessary gaskets and downpipe hardware for a complete repair.
- Ideal replacement - this exhaust manifold was precision-engineered and durably manufactured to match the fit and function of the stock manifold on specified vehicles
- Reliable construction - durable materials resist warping, cracking and leaking for long-lasting performance
- Complete repair - includes all necessary gaskets and downpipe hardware
- Trustworthy design - built by industry leader in aftermarket manifolds
Vehicle Fitment
| Year | Make | Model | Position | Notes |
|---|---|---|---|---|
| 2004-2007 | Buick | Rainier | Right | 5.3L V8 |
| 2009-2012 | Chevrolet | Colorado | Right | 5.3L V8 |
| 2004-2006 | Chevrolet | SSR | Right | |
| 2006-2009 | Chevrolet | Trailblazer | Right | 6.0L V8 |
| 2006-2008 | Chevrolet | Trailblazer | Right | 5.3L V8 |
| 2003-2006 | Chevrolet | Trailblazer EXT | Right | 5.3L V8 |
| 2009-2012 | GMC | Canyon | Right | 5.3L V8 |
| 2005-2009 | GMC | Envoy | Right | 5.3L V8 |
| 2003-2006 | GMC | Envoy XL | Right | 5.3L V8 |
| 2004-2005 | GMC | Envoy XUV | Right | 5.3L V8 |
| 2008-2010 | Hummer | H3 | Right | 5.3L V8 |
| 2009-2010 | Hummer | H3T | Right | 5.3L V8 |
| 2003-2006 | Isuzu | Ascender | Right | 5.3L V8 |
| 2008-2009 | Saab | 9-7x | Right | 6.0L V8 |
| 2005-2009 | Saab | 9-7x | Right | 5.3L V8 |
Please confirm the part number and your vehicle's year, make, model and engine before ordering. Questions? Message us with your VIN and we'll check fitment for you.
Specifications
| Brand | Dorman |
|---|---|
| Part Number | 674-785 |
| UPC | 019495152866 |
| Placement | Right |
| Material | Cast Iron |
| Color | Metallic Gray |
| Mounting Hardware Included | Yes |
| Gasket Or Seal Included | Yes |
| Port Shape | Round |
| Grade Type | Standard Replacement |
| Heat Shield Included | Yes |
| Package Contents | Exhaust Manifold; 1 Manifold Gasket and 1 Flange; 3 Studs; 3 Nuts |
| Country of Origin | China |
| Warranty | Limited Lifetime |
OE & Interchange Numbers
| 12600527 | General Motors (OE) |
|---|---|
| 8125674840 | Isuzu (OE) |
| 12567484 | General Motors (OE) |
| 663280 | Interchange |
| 24056704530728224 | Interchange |
| 101408 | Interchange |