How to replace the catalytic converter on a 4.2L engine on GMC Envoy?

Raise the vehicle first to replace the Catalytic Converter on a 4.2l engine. Take out the heated Oxygen Sensor (H2OS) as well as nuts that hold the Catalytic Converter pipe to Exhaust Manifold, throw away the old exhaust seal as it cannot be repeated. Then pop-off the nuts that hold the Catalytic Converter pipe to the Muffler and transmission mount before you get the Catalytic Converter pipe out of the vehicle and take the Exhaust Hanger off of the pipe. For installation, install the Exhaust Hanger on the Catalytic Converter pipe, then reinstall the pipe into the vehicle and transmission mount. Connect the converter pipe to the Muffler in such a way that the exhaust flange nuts are tightened equally, aligned the joint to avoid leaks; hand thread both nuts up until they meet the exhaust flange and then tighten up to 45 n.m (33 lb ft). Replace with a new exhaust seal when connecting the converter pipe to the Exhaust Manifold. Doing it, hand tighten nuts evenly, until secure, and tighten and to 50 n.m (37 lb ft). Lastly, reinstall the h2os and drop the vehicle.

OEM GMC Envoy Catalytic Converter

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12 Catalytic Converters found

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GMC Envoy Catalytic Converter
Part Number: 15808213
$1213.76 MSRP: $1809.85
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Product Specifications
- Other Name: Converter Assembly-3Way Catalytic (W/Exhaust Manifold P; Exhaust Pipe; Converter & Pipe; Converter, Catalytic Converter; Converter, Exhaust Pipe
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2006 GMC Envoy | Denali | 8 Cyl 5.3 L GAS
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GMC Envoy Catalytic Converter
Part Number: 25887914
Product Specifications
- Other Name: Converter Assembly-3Way Catalytic (W/Exhaust Manifold P; Exhaust Pipe; Converter & Pipe; Converter, Catalytic Converter; Converter, Exhaust Pipe
- Replaces: 15892954
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2008-2009 GMC Envoy | Denali | 8 Cyl 5.3 L GAS
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GMC Envoy Catalytic Converter
Part Number: 25839176
Product Specifications
- Other Name: Converter Assembly-3Way Catalytic (W/Exhaust Manifold P; Exhaust Pipe; Converter & Pipe; Converter, Catalytic Converter; Converter, Exhaust Pipe
- 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 Converter & Pipe
Part Number: 15813517
Product Specifications
- Other Name: Converter Assembly-3Way Catalytic (W/Exhaust Manifold P; Catalytic Converter; Exhaust Pipe; Converter, Catalytic Converter; Converter, Exhaust Pipe
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2007 GMC Envoy | Denali | 8 Cyl 5.3 L GAS
View related parts
GMC Envoy Catalytic Converter
Part Number: 15798414
Product Specifications
- Other Name: Converter Assembly-3Way Catalytic (W/Exhaust Manifold P; Converter & Pipe; Converter, Catalytic Converter; Converter, Exhaust Pipe
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2006-2007 GMC Envoy | Denali | 8 Cyl 5.3 L GAS
View related parts
GMC Envoy Catalytic Converter
Part Number: 15276514
Product Specifications
- Other Name: Converter, 3Way Catalytic (W/Exhaust Manifold Pipe); Exhaust Pipe; Converter & Pipe; Converter, Catalytic Converter; Converter, Exhaust Pipe
- 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
View related parts
GMC Envoy Catalytic Converter
Part Number: 15276513
Product Specifications
- Other Name: Converter Assembly-3Way Catalytic (W/Exhaust Manifold P; Exhaust Pipe; Converter & Pipe; Converter, Catalytic Converter
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2006 GMC Envoy | SLE, SLT | 6 Cyl 4.2 L GAS
View related parts
GMC Envoy Catalytic Converter
Part Number: 15216001
Product Specifications
- Other Name: Converter Assembly-3Way Catalytic (W/Exhaust Manifold P; Exhaust Pipe; Converter & Pipe; Converter, Catalytic Converter; Converter, Exhaust Pipe
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2004-2005 GMC Envoy | SLE, SLT | 6 Cyl 4.2 L GAS
View related parts
GMC Envoy Catalytic Converter
Part Number: 15216000
Product Specifications
- Other Name: Converter, 3Way Catalytic (W/Exhaust Manifold Pipe); Exhaust Pipe; Converter & Pipe; Converter, Catalytic Converter; Converter, Exhaust Pipe
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2004-2005 GMC Envoy | SLE, SLT | 6 Cyl 4.2 L GAS
View related parts
GMC Envoy Catalytic Converter
Part Number: 15155245
Product Specifications
- Other Name: Converter, 3Way Catalytic (W/Exhaust Manifold Pipe); Exhaust Pipe; Converter & Pipe; Converter, Catalytic Converter; Converter, Exhaust Pipe
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2002-2003 GMC Envoy | SLE, SLT | 6 Cyl 4.2 L GAS
View related parts
GMC Envoy Catalytic Converter
Part Number: 15119821
Product Specifications
- Other Name: Converter Assembly-3Way Catalytic (W/Exhaust Manifold P; Converter & Pipe; Converter, Catalytic Converter; Converter, Exhaust Pipe
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2005 GMC Envoy | Denali | 8 Cyl 5.3 L GAS
View related parts
GMC Envoy Catalytic Converter
Part Number: 15050555
Product Specifications
- Other Name: Converter, Catalytic Converter; Exhaust Pipe; Converter & Pipe; Converter, Exhaust Pipe
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2002-2003 GMC Envoy | SLE, SLT | 6 Cyl 4.2 L GAS

GMC Envoy Catalytic Converter

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GMC Envoy Catalytic Converter Parts Questions & Experts Answers

Converter & Pipe
15813517
Q: How to replace the catalytic converter on a 4.2L engine on GMC Envoy?
A: Raise the vehicle first to replace the Catalytic Converter on a 4.2l engine. Take out the heated Oxygen Sensor (H2OS) as well as nuts that hold the Catalytic Converter pipe to Exhaust Manifold, throw away the old exhaust seal as it cannot be repeated. Then pop-off the nuts that hold the Catalytic Converter pipe to the Muffler and transmission mount before you get the Catalytic Converter pipe out of the vehicle and take the Exhaust Hanger off of the pipe. For installation, install the Exhaust Hanger on the Catalytic Converter pipe, then reinstall the pipe into the vehicle and transmission mount. Connect the converter pipe to the Muffler in such a way that the exhaust flange nuts are tightened equally, aligned the joint to avoid leaks; hand thread both nuts up until they meet the exhaust flange and then tighten up to 45 n.m (33 lb ft). Replace with a new exhaust seal when connecting the converter pipe to the Exhaust Manifold. Doing it, hand tighten nuts evenly, until secure, and tighten and to 50 n.m (37 lb ft). Lastly, reinstall the h2os and drop the vehicle.

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