How to replace a catalytic converter?

Because of a Federally-mandated extended warranty, it is recommended to check with a dealer service department before replacing the catalytic converter at your own expense. A catalytic converter is an emission control device in the exhaust system that reduces certain pollutants in the exhaust gas stream. There are two types of converters: an oxidation catalyst that reduces hydrocarbons and carbon monoxide, and a reduction catalyst that reduces oxides of nitrogen. If you suspect that the converter is malfunctioning, take it to a dealer or authorized emission inspection facility for diagnosis and repair. When raising the vehicle to service underbody components, inspect the converter for leaks, corrosion, dents, and other damage. Check the welds and flange bolts and nuts that attach the front and rear ends of the converter to the exhaust system, and replace the converter if any damage is noted. Catalytic converters can become clogged or plugged up, and a vacuum gauge can be used to diagnose the effect of a blocked exhaust on intake vacuum. If the fourth reading is more than one in-Hg lower than the reading at idle, the exhaust system might be restricted. To replace the catalytic converter, raise the vehicle and secure it on jackstands. Spray penetrant onto the threads of the exhaust manifold-to-catalyst pipe nuts and bolts, as well as the catalyst pipe-to-exhaust pipe nuts and bolts. Disconnect and remove the upstream and downstream oxygen sensors. Unscrew the exhaust manifold-to-catalyst pipe flange nuts and bolts, and unscrew the clamp that secures the slip joint between the exhaust pipe behind the catalytic converter and the pipe ahead of the muffler. Remove the catalytic converter assembly and discard the old flange gasket. Installation is the reverse of removal, using new flange gaskets, bolts, and a new clamp.

Genuine Chevrolet Express Catalytic Converter

Cat. Converter

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67 Catalytic Converters found

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Chevrolet Express 3Way Catalytic Convertor Assembly (W/ Exhaust Manifold P
Part Number: 15853441
$2007.88 MSRP: $3052.81
You Save: $1044.93 (35%)
ADD TO CART
Product Specifications
- Other Name: Converter Assembly, 3Way Catalytic (W/ Exhaust Manifold P; Catalytic Converter, Converter & Pipe
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2006-2009 Chevrolet Express | 1 TON CARGO EXPRESS, 1 TON PASSENGER, 3/4 TON CARGO EXPRESS, 3/4 TON PASSENGER EXPRESS | 8 Cyl 4.8L, 8 Cyl 6.0L
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Chevrolet Express CONVERTER ASM,3WAY CTLTC (W/EXH MANIF PIPE)"KIT"
Part Number: 19418944
$1641.06 MSRP: $2476.23
You Save: $835.17 (34%)
ADD TO CART
Product Specifications
- Replaces: 25943821, 22832592
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2011-2015 Chevrolet Express | 1 TON COMMERCIAL/RV CUTAWAY | 8 Cyl 4.8L Flex, 8 Cyl 6.0L, 8 Cyl 6.0L Flex
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Chevrolet Express CONVERTER ASM,W/UP 3WAY CTLTC (W/ EXH PIPE)
Part Number: 19420297
$1966.79 MSRP: $2953.83
You Save: $987.04 (34%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Catalytic Converter, Converter & Pipe
- Replaces: 23269390, 25943820
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2012-2020 Chevrolet Express | 1 TON CARGO EXPRESS, 1 TON PASSENGER, 3/4 TON CARGO EXPRESS, 3/4 TON PASSENGER EXPRESS | 8 Cyl 4.8L Flex, 8 Cyl 6.0L, 8 Cyl 6.0L Flex
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Chevrolet Express CONVERTER ASM-W/UP 3WAY CTLTC (W/ EXH PIP
Part Number: 85593477
$1214.03 MSRP: $1818.45
You Save: $604.42 (34%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Catalytic Converter, Converter & Pipe
- Replaces: 19420306, 84296974
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2018-2020 Chevrolet Express | 1 TON CARGO EXPRESS, 1 TON COMMERCIAL/RV CUTAWAY, 1 TON PASSENGER, 3/4 TON CARGO EXPRESS, 3/4 TON PASSENGER EXPRESS | 6 Cyl 4.3L
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Chevrolet Express CONVERTER ASM,W/UP 3WAY CTLTC (W/ EXH PIPE)
Part Number: 19420296
$1978.26 MSRP: $3085.41
You Save: $1107.15 (36%)
ADD TO CART
Product Specifications
- Replaces: 23269362
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2016-2020 Chevrolet Express | 1 TON COMMERCIAL/RV CUTAWAY | 8 Cyl 4.8L Flex, 8 Cyl 6.0L, 8 Cyl 6.0L Flex
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Chevrolet Express 3Way Catalytic Convertor Assembly (W/ Exhaust Manifold P
Part Number: 15120814
$1301.15 MSRP: $1949.84
You Save: $648.69 (34%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Converter Assembly, 3Way Catalytic (W/ Exhaust Manifold P; Catalytic Converter
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2004-2006 Chevrolet Express | 1 TON CARGO EXPRESS, 1 TON PASSENGER, 3/4 TON CARGO EXPRESS, 3/4 TON PASSENGER EXPRESS | 8 Cyl 4.8L, 8 Cyl 6.0L
View related parts
Chevrolet Express 3Way Catalytic Convertor Assembly (W/ Exhaust Manifold P
Part Number: 15853440
$2023.57 MSRP: $3243.47
You Save: $1219.90 (38%)
ADD TO CART
Product Specifications
- Other Name: Converter Assembly, 3Way Catalytic (W/ Exhaust Manifold P; Catalytic Converter, Converter & Pipe
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2006-2009 Chevrolet Express | 1 TON CARGO EXPRESS, 1 TON PASSENGER, 3/4 TON CARGO EXPRESS, 3/4 TON PASSENGER EXPRESS | 8 Cyl 4.8L, 8 Cyl 6.0L
View related parts
Chevrolet Express CONVERTER ASM,3WAY CTLTC (W/EXH MANIF PIPE) "KIT"
Part Number: 19419596
$1627.23 MSRP: $2441.67
You Save: $814.44 (34%)
ADD TO CART
Product Specifications
- Replaces: 25943818
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2011-2015 Chevrolet Express | 1 TON COMMERCIAL/RV CUTAWAY | 8 Cyl 4.8L Flex, 8 Cyl 6.0L Flex
View related parts
Chevrolet Express CONVERTER ASM-W/UP 3WAY CTLTC (W/ EXH PIP
Part Number: 85577179
$2019.50 MSRP: $3033.33
You Save: $1013.83 (34%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Catalytic Converter, Converter & Pipe
- Replaces: 85166835, 84854615
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2021-2023 Chevrolet Express | 1 TON CARGO EXPRESS, 1 TON COMMERCIAL/RV CUTAWAY, 1 TON PASSENGER, 3/4 TON CARGO EXPRESS, 3/4 TON PASSENGER EXPRESS, Van 3/4 Ton Cargo Express | 6 Cyl 4.3L, 8 Cyl 6.6L
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Chevrolet Express CONVERTER ASM,CTLTC (W/ EXH MANIF PIPE)<SPLIT>"KIT"
Part Number: 19418963
$1284.68 MSRP: $1925.00
You Save: $640.32 (34%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Catalytic Converter, Converter & Pipe
- Replaces: 15853437, 25921611, 25758569
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2003-2010 Chevrolet Express | 1 TON CARGO EXPRESS, 1 TON COMMERCIAL/RV CUTAWAY, 1 TON PASSENGER, 3/4 TON CARGO EXPRESS, 3/4 TON PASSENGER EXPRESS | 8 Cyl 4.8L, 8 Cyl 4.8L Flex, 8 Cyl 6.0L, 8 Cyl 6.0L Flex
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Chevrolet Express CONVERTER ASM,OXIDN CTLTC
Part Number: 19420268
$1662.03 MSRP: $2494.17
You Save: $832.14 (34%)
ADD TO CART
Product Specifications
- Other Name: Catalytic Converter, Converter & Pipe
- Replaces: 22768282, 22893734, 22743692, 84451334
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2010-2016 Chevrolet Express | 1 TON CARGO EXPRESS, 1 TON CARGO SAVANA, 1 TON COMMERCIAL/RV CUTAWAY, 1 TON PASSENGER, 3/4 TON CARGO EXPRESS, 3/4 TON CARGO SAVANA, 3/4 TON PASSENGER EXPRESS, 3/4 TON PASSENGER SAVANA | 8 Cyl 6.6L Diesel
View related parts
Chevrolet Express 3Way Catalytic Convertor Assembly (W/ Exhaust Manifold P
Part Number: 15853442
$964.09 MSRP: $1441.47
You Save: $477.38 (34%)
ADD TO CART
Product Specifications
- Other Name: Converter Assembly, 3Way Catalytic (W/ Exhaust Manifold P; Converter & Pipe
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2007-2008 Chevrolet Express | 1 TON CARGO EXPRESS, 1 TON PASSENGER, 3/4 TON CARGO EXPRESS, 3/4 TON PASSENGER EXPRESS | 8 Cyl 4.8L, 8 Cyl 6.0L
View related parts
Chevrolet Express CONVERTER ASM,3WAY CTLTC (W/EXH MANIF PIPE)"KIT"
Part Number: 19418954
$1900.03 MSRP: $2853.13
You Save: $953.10 (34%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Catalytic Converter
- Replaces: 15853438, 20858260, 25758568, 15120812
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2004-2010 Chevrolet Express | 1 TON COMMERCIAL/RV CUTAWAY | 8 Cyl 4.8L, 8 Cyl 4.8L Flex, 8 Cyl 6.0L, 8 Cyl 6.0L Flex
View related parts
Chevrolet Express CONVERTER ASM,3WAY CTLTC (W/EXH MANIF PIPE)"KIT"
Part Number: 19418962
$1761.49 MSRP: $2722.18
You Save: $960.69 (36%)
ADD TO CART
Product Specifications
- Other Name: Catalytic Converter, Converter & Pipe
- Replaces: 25839216, 20953444
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2009-2014 Chevrolet Express | 1 TON CARGO EXPRESS, 1 TON CARGO SAVANA, 1 TON PASSENGER, 1/2 TON CARGO EXPRESS, 1/2 TON CARGO SAVANA, 1/2 TON PASSENGER EXPRESS, 1/2 TON PASSENGER SAVANA, 3/4 TON CARGO EXPRESS, 3/4 TON CARGO SAVANA, 3/4 TON PASSENGER EXPRESS, 3/4 TON PASSENGER SAVANA | 6 Cyl 4.3L, 8 Cyl 4.8L Flex, 8 Cyl 5.3L, 8 Cyl 6.0L, 8 Cyl 6.0L Flex
View related parts
Chevrolet Express 3Way Catalytic Convertor Assembly (W/ Exhaust Manifold P
Part Number: 15128301
$1555.67 MSRP: $2333.73
You Save: $778.06 (34%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Converter Assembly, 3Way Catalytic (W/ Exhaust Manifold P; Catalytic Converter, Converter & Pipe
- Replaces: 15204924
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2003-2006 Chevrolet Express | 1/2 TON CARGO EXPRESS, 1/2 TON PASSENGER EXPRESS, 3/4 TON CARGO EXPRESS, 3/4 TON PASSENGER EXPRESS | 6 Cyl 4.3L, 8 Cyl 5.3L
View related parts
Chevrolet Express 3Way Catalytic Convertor Assembly (W/ Exhaust Manifold *Marked Print *Marked Print
Part Number: 15747730
$1628.31 MSRP: $2443.30
You Save: $814.99 (34%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Converter Assembly, 3Way Catalytic (W/ Exhaust Manifold *Marked Print; Catalytic Converter, Converter & Pipe
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2000-2002 Chevrolet Express | 1/2 TON CARGO EXPRESS, 1/2 TON PASSENGER EXPRESS, 3/4 TON CARGO EXPRESS, 3/4 TON PASSENGER EXPRESS | 6 Cyl 4.3L, 8 Cyl 5.7L
View related parts
Chevrolet Express CONVERTER ASM,3WAY CTLTC (W/EXH MANIF PIPE)"KIT"
Part Number: 19418961
$1614.01 MSRP: $2421.73
You Save: $807.72 (34%)
ADD TO CART
Product Specifications
- Replaces: 25943819
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2011-2015 Chevrolet Express | 1 TON COMMERCIAL/RV CUTAWAY | 8 Cyl 4.8L Flex, 8 Cyl 6.0L, 8 Cyl 6.0L Flex
View related parts
Chevrolet Express 3Way Catalytic Convertor Assembly (W/Exhaust Manifold Pip
Part Number: 15084243
$1300.55 MSRP: $1948.94
You Save: $648.39 (34%)
ADD TO CART
Product Specifications
- Other Name: Converter Assembly, 3Way Catalytic (W/Exhaust Manifold Pip; Catalytic Converter
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2004-2006 Chevrolet Express | 1 TON CARGO EXPRESS, 1 TON PASSENGER, 3/4 TON CARGO EXPRESS, 3/4 TON PASSENGER EXPRESS | 8 Cyl 4.8L, 8 Cyl 6.0L
View related parts
Chevrolet Express 3Way Catalytic Convertor Assembly (W/ Exhaust Manifold P
Part Number: 20953446
$2147.34 MSRP: $3226.15
You Save: $1078.81 (34%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Converter Assembly, 3Way Catalytic (W/ Exhaust Manifold P; Catalytic Converter, Converter & Pipe
- Replaces: 25849058
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2009-2014 Chevrolet Express | 1/2 TON CARGO EXPRESS, 1/2 TON CARGO SAVANA, 1/2 TON PASSENGER EXPRESS, 1/2 TON PASSENGER SAVANA | 8 Cyl 5.3L
View related parts
Chevrolet Express Nitrogen Oxide Catalytic Converter Assembly (W/ Exhaust Pipe)
Part Number: 84398056
$893.22 MSRP: $1334.57
You Save: $441.35 (34%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Converter Assembly, Nitrogen Oxide Catalytic (W/ Exhaust Pipe); Catalytic Converter
- Replaces: 84100801
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2017-2022 Chevrolet Express | 1 TON CARGO EXPRESS, 1 TON PASSENGER, 3/4 TON CARGO EXPRESS, 3/4 TON PASSENGER EXPRESS | 4 Cyl 2.8L Diesel

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Chevrolet Express Catalytic Converter

Each OEM Chevrolet Express Catalytic Converter we offer is competitively priced and comes with the assurance of the manufacturer's warranty for the part. Furthermore, we guarantee the speedy delivery of your orders right to your doorstep. Our hassle-free return policy is also in place for your peace of mind.

Chevrolet Express Catalytic Converter Parts Questions & Experts Answers

3Way Catalytic Convertor Assembly (W/ Exhaust Manifold P
20953446
Q: How to replace a catalytic converter?
A: Because of a Federally-mandated extended warranty, it is recommended to check with a dealer service department before replacing the catalytic converter at your own expense. A catalytic converter is an emission control device in the exhaust system that reduces certain pollutants in the exhaust gas stream. There are two types of converters: an oxidation catalyst that reduces hydrocarbons and carbon monoxide, and a reduction catalyst that reduces oxides of nitrogen. If you suspect that the converter is malfunctioning, take it to a dealer or authorized emission inspection facility for diagnosis and repair. When raising the vehicle to service underbody components, inspect the converter for leaks, corrosion, dents, and other damage. Check the welds and flange bolts and nuts that attach the front and rear ends of the converter to the exhaust system, and replace the converter if any damage is noted. Catalytic converters can become clogged or plugged up, and a vacuum gauge can be used to diagnose the effect of a blocked exhaust on intake vacuum. If the fourth reading is more than one in-Hg lower than the reading at idle, the exhaust system might be restricted. To replace the catalytic converter, raise the vehicle and secure it on jackstands. Spray penetrant onto the threads of the exhaust manifold-to-catalyst pipe nuts and bolts, as well as the catalyst pipe-to-exhaust pipe nuts and bolts. Disconnect and remove the upstream and downstream Oxygen Sensors. Unscrew the exhaust manifold-to-catalyst pipe flange nuts and bolts, and unscrew the clamp that secures the slip joint between the exhaust pipe behind the catalytic converter and the pipe ahead of the muffler. Remove the catalytic converter assembly and discard the old flange gasket. Installation is the reverse of removal, using new flange gaskets, bolts, and a new clamp.