How to replace the left exhaust manifold on GMC Envoy?

The vehicle requires support during elevation while you remove the nuts that connect the Catalytic Converter to the left Exhaust Manifold. Lower the vehicle then remove spark plugs from their location. The heat shield bolts then the shield from the Exhaust Manifold must be removed prior to taking out the Exhaust Manifold bolts and the manifold itself. Discard the old gasket. Exhaust Manifold needs both cleaning steps and an inspection process. Make sure to check the threads in the Exhaust Manifold bolt holes on the Cylinder Head for clean condition without any presence of threadlocking materials or debris. Threadlock gm p/n 12345493 (Canadian P/N 10953488) should be applied as a 5 mm (0.2 inch) wide band to the Exhaust Manifold bolts' threads while keeping sealant off the initial 3 threads. Windward 12345493 (Canadian 10953488) as threadlocker on the bolts before installing the gasket and new bolts at 15 nm (11 ft. Lbs.) while beginning with the middle two bolts and proceeding with alternate side-to-side torques before finishing with 25 nm (18 ft. Lbs.) torques. Fit the heat shield followed by the bolts which should be torqued to 9 nm with an 80 inch lb torque setting then use a flat punch to fold over the Exhaust Manifold gasket at the rear of the left Cylinder Head. After reinstalling the spark plugs you should raise the vehicle to attach the Catalytic Converter securely to the left Exhaust Manifold by tightening its nuts to 50 nm (37 ft. Lbs.).

OEM GMC Envoy Exhaust Manifold

Engine Exhaust Manifold

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5 Exhaust Manifolds found

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GMC Envoy Exhaust Manifold, Passenger Side Part Number: 12600527
$123.41 MSRP: $210.11
You Save: $86.70 (42%)
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Product Specifications
- Other Name: Manifold, Engine Exhaust Manifold; Manifold
- Position: Passenger Side
- Replaces: 12567484
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2005-2009 GMC Envoy | Denali | 8 Cyl 5.3 L GAS
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GMC Envoy Exhaust Manifold Part Number: 12587310
$195.09 MSRP: $309.73
You Save: $114.64 (38%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Manifold, Engine Exhaust Manifold; Manifold
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2006-2007 GMC Envoy | SLE, SLT | 6 Cyl 4.2 L GAS
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GMC Envoy Exhaust Manifold Part Number: 88890560
Product Specifications
- Other Name: Manifold, Engine Exhaust Manifold; Manifold
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2002-2005 GMC Envoy | SLE, SLT | 6 Cyl 4.2 L GAS
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GMC Envoy Exhaust Manifold Part Number: 12637060
$173.53 MSRP: $273.05
You Save: $99.52 (37%)
Product Specifications
- Other Name: Manifold, Engine Exhaust Manifold; Manifold
- Replaces: 12597166
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2008-2009 GMC Envoy | SLE, SLT | 6 Cyl 4.2 L GAS
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GMC Envoy Exhaust Manifold, Driver Side Part Number: 12600526
$113.18 MSRP: $178.09
You Save: $64.91 (37%)
Product Specifications
- Other Name: Manifold, Engine Exhaust Manifold; Manifold
- Position: Driver Side
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2005-2009 GMC Envoy | Denali | 8 Cyl 5.3 L GAS

GMC Envoy Exhaust Manifold

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The Exhaust Manifold of GMC Envoy vehicles helps to direct hot gases coming from the engine, through the exhaust system successfully. Located at the top of the system, the manifold attaches to the engine block through the help of an exhaust manifold gasket. Depending on the cylinder layout and specific vehicle requirements, exhaust manifolds could be made of different designs, sizes and of various materials but their main function remains the same- to properly route the exhaust gases throughout the system and eliminate the issue of intake reversion to maintain the engines' operability. The manifold still remains safe for the occupants in that it separates them from the dangerous exhaust gas. Also, units referred to as headers are intended to optimize the performance of the engine by eliminating restrictions on the exhaust flow and boosting the speed of the exhaust gases. All in all, exhaust manifold is very crucial part for proper functioning and safety for the GMC Envoy cars.

GMC Envoy Exhaust Manifold Parts and Q&A

Exhaust Manifold, Driver Side
12600526
Q: How to replace the left exhaust manifold on GMC Envoy?
A:
The vehicle requires support during elevation while you remove the nuts that connect the Catalytic Converter to the left Exhaust Manifold. Lower the vehicle then remove Spark Plugs from their location. The heat shield bolts then the shield from the Exhaust Manifold must be removed prior to taking out the Exhaust Manifold bolts and the manifold itself. Discard the old gasket. Exhaust Manifold needs both cleaning steps and an inspection process. Make sure to check the threads in the Exhaust Manifold bolt holes on the Cylinder Head for clean condition without any presence of threadlocking materials or debris. Threadlock gm p/n 12345493 (Canadian P/N 10953488) should be applied as a 5 mm (0.2 inch) wide band to the Exhaust Manifold bolts' threads while keeping sealant off the initial 3 threads. Windward 12345493 (Canadian 10953488) as threadlocker on the bolts before installing the gasket and new bolts at 15 nm (11 ft. Lbs.) while beginning with the middle two bolts and proceeding with alternate side-to-side torques before finishing with 25 nm (18 ft. Lbs.) torques. Fit the heat shield followed by the bolts which should be torqued to 9 nm with an 80 inch lb torque setting then use a flat punch to fold over the Exhaust Manifold gasket at the rear of the left Cylinder Head. After reinstalling the spark plugs you should raise the vehicle to attach the Catalytic Converter securely to the left Exhaust Manifold by tightening its nuts to 50 nm (37 ft. Lbs.).