What is a catalytic converter and how do you diagnose and repair it?

A catalytic converter is an emission control device that reduces certain pollutants. There are two types of converters: an oxidation catalyst that reduces hydrocarbons and carbon monoxide, and a reduction catalyst that reduces oxides of nitrogen. Vehicles are equipped with two three-way catalysts that can reduce all three pollutants. Whenever you raise the vehicle to service underbody components, inspect the converter for leaks, corrosion, dents, and other damage. The easiest way to check for a restricted converter is to use a vacuum gauge to diagnose the effect of a blocked exhaust on the intake vacuum. To remove the converter, raise the vehicle and place it securely on jack stands, disconnect the electrical connectors for the upstream and downstream oxygen sensors, remove all four sensors, remove the nuts at each of the upper flanges that secure the front exhaust pipe assembly to the exhaust manifold flanges, remove the nuts that secure the rear flange of the front exhaust pipe assembly to the rest of the exhaust system, and remove the front exhaust pipe assembly. To install the converter, coat the threads of the nuts and bolts with an anti-seize compound to facilitate future removal and tighten the nuts that secure the front exhaust pipe assembly to the exhaust manifold and to the rest of the exhaust system securely.

Genuine Chevrolet Tahoe Catalytic Converter

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24 Catalytic Converters found

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Chevrolet Tahoe 3Way Catalytic Convertor Assembly (W/Exhaust Pipe)
Part Number: 23486656
$1838.28 MSRP: $2760.00
You Save: $921.72 (34%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Converter Assembly, 3Way Catalytic(W/Exhaust Pipe); Catalytic Converter, Converter & Pipe
- Replaced by: 19420288
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2016-2020 Chevrolet Tahoe | 1500 4 DOOR UTILITY | 8 Cyl 5.3L
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Chevrolet Tahoe 3Way Catalytic Convertor Assembly (W/ Exhaust Manifold P
Part Number: 25904628
$1326.54 MSRP: $2996.63
You Save: $1670.09 (56%)
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
- Replaced by: 19418939
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2007-2008 Chevrolet Tahoe | 4 DOOR 1/2 TON | 8 Cyl 4.8L, 8 Cyl 5.3L, 8 Cyl 5.3L Flex
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Chevrolet Tahoe 3Way Catalytic Convertor Assembly (W/ Exhaust Manifold P
Part Number: 20854453
$1724.85 MSRP: $2690.39
You Save: $965.54 (36%)
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
- Replaced by: 19418926
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2009-2014 Chevrolet Tahoe | 4 DOOR 1/2 TON | 8 Cyl 4.8L, 8 Cyl 5.3L, 8 Cyl 5.3L Flex, 8 Cyl 6.0L Flex
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Chevrolet Tahoe 3Way Catalytic Convertor Assembly (W/ Exhaust Manifold P
Part Number: 20757674
$1834.97 MSRP: $2755.00
You Save: $920.03 (34%)
ADD TO CART
Product Specifications
- Other Name: Converter Assembly, 3Way Catalytic (W/ Exhaust Manifold P; Catalytic Converter, Converter & Pipe
- Replaced by: 19420276
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2015 Chevrolet Tahoe | 1500 4 DOOR UTILITY | 8 Cyl 5.3L
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Chevrolet Tahoe CONVERTER ASM,3WAY CTLTC(W/EXH PIPE)
Part Number: 19420265
$2022.57 MSRP: $3037.97
You Save: $1015.40 (34%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Other Name: Catalytic Converter, Converter & Pipe
- Replaces: 23111625, 84362281
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2018-2020 Chevrolet Tahoe | 1500 4 DOOR UTILITY | 8 Cyl 6.2L
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Chevrolet Tahoe Converter Assembly, 3Way Ctltc(W/Exh Pipe)
Part Number: 84769824
$1376.51 MSRP: $2063.53
You Save: $687.02 (34%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Catalytic Converter, Converter & Pipe
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2021 Chevrolet Tahoe | 4 DOOR 1/2 TON | 8 Cyl 6.2L
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Chevrolet Tahoe CONVERTER ASM,3WAY CTLTC (W/EXH MANIF PIPE)"KIT"
Part Number: 19418932
$2255.33 MSRP: $3389.03
You Save: $1133.70 (34%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Catalytic Converter, Converter & Pipe
- Replaces: 25824121
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2007-2008 Chevrolet Tahoe | 4 DOOR 1/2 TON | 8 Cyl 4.8L, 8 Cyl 5.3L, 8 Cyl 5.3L Flex, 8 Cyl 6.0L
View related parts
Chevrolet Tahoe CONVERTER ASM,3WAY CTLTC (W/EXH MANIF PIPE)"KIT"
Part Number: 19418941
$2125.30 MSRP: $3192.92
You Save: $1067.62 (34%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Catalytic Converter, Converter & Pipe
- Replaces: 20854454, 15905948
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2009-2014 Chevrolet Tahoe | 4 DOOR 1/2 TON | 8 Cyl 4.8L, 8 Cyl 5.3L, 8 Cyl 5.3L Flex, 8 Cyl 6.0L Flex
View related parts
Chevrolet Tahoe 3-Way Catalytic Convertor Assembly (W/ Exhaust Manifold Pipe)
Part Number: 19208464
$992.35 MSRP: $1484.08
You Save: $491.73 (34%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Converter Asm,3Way Catalytic (W/ Exhaust Manifold Pipe); Catalytic Converter, Converter & Pipe
- Replaced by: 19420098
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2006 Chevrolet Tahoe | 4 DOOR 1/2 TON | 8 Cyl 4.8L, 8 Cyl 5.3L, 8 Cyl 5.3L Flex
View related parts
Chevrolet Tahoe 3Way Catalytic Convertor Assembly (W/ Exhaust Manifold P
Part Number: 10395213
$946.55 MSRP: $1415.00
You Save: $468.45 (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, Front Pipe
- Replaced by: 19420124
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2001-2005 Chevrolet Tahoe | 4 DOOR 1/2 TON
View related parts
Chevrolet Tahoe 3Way Catalytic Convertor Assembly (W/ Exhaust Manifold P
Part Number: 10395214
$1230.70 MSRP: $1843.58
You Save: $612.88 (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, Front Pipe
- Replaced by: 19420109
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2001-2005 Chevrolet Tahoe | 4 DOOR 1/2 TON
View related parts
Chevrolet Tahoe 3Way Catalytic Convertor Assembly (W/Exhaust Pipe)
Part Number: 84655074
$1320.74 MSRP: $1979.40
You Save: $658.66 (34%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Converter Assembly, 3Way Ctltc(W/Exh Pipe); Catalytic Converter
- Replaced by: 86781749
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2021 Chevrolet Tahoe | 4 DOOR 1/2 TON | 8 Cyl 5.3L
View related parts
Chevrolet Tahoe Converter Assembly, Nox Ctltc (W/ Fltr)
Part Number: 12709334
$835.65 MSRP: $1247.73
You Save: $412.08 (34%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Replaced by: 40009139
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2021 Chevrolet Tahoe | 4 DOOR 1/2 TON
View related parts
Chevrolet Tahoe 3Way Catalytic Convertor (W/Exhaust Manifold Pipe)
Part Number: 15746547
$1829.79 MSRP: $2747.21
You Save: $917.42 (34%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Converter,3Way Catalytic(W/Exhaust Manifold Pipe); Converter
- Replaced by: 19420113
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 1996-2000 Chevrolet Tahoe | CLASSIC 2 DOOR 1/2 TON, CLASSIC 4 DOOR 1/2 TON | 8 Cyl 5.7L
View related parts
Chevrolet Tahoe Converter Assembly, Nox Ctltc (W/ Exh Pipe)
Part Number: 84749006
$212.64 MSRP: $306.67
You Save: $94.03 (31%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Catalytic Converter, Converter & Pipe
- Replaced by: 85521780
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2021 Chevrolet Tahoe | 4 DOOR 1/2 TON
View related parts
Chevrolet Tahoe CONVERTER ASM,3WAY CTLTC (W/EXH MANIF PIPE)"KIT"
Part Number: 19418955
$2049.82 MSRP: $3218.12
You Save: $1168.30 (37%)
ADD TO CART
Product Specifications
- Other Name: Catalytic Converter, Converter & Pipe
- Replaces: 25904630
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2008 Chevrolet Tahoe | 4 DOOR 1/2 TON | 8 Cyl 4.8L, 8 Cyl 5.3L, 8 Cyl 5.3L Flex
View related parts
Chevrolet Tahoe CONVERTER ASM,3WAY CTLTC (W/EXH MANIF PIPE)"KIT"
Part Number: 19418928
$1813.97 MSRP: $2723.32
You Save: $909.35 (34%)
Product Specifications
- Other Name: Catalytic Converter, Converter & Pipe
- Replaces: 15246489, 15052911, 15076459, 15756279, 10395212, 19206638, 15082124, 15076458, 15036169, 15756278
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2000-2005 Chevrolet Tahoe | 4 DOOR 1/2 TON | 8 Cyl 4.8L, 8 Cyl 5.3L, 8 Cyl 5.3L Flex
View related parts
Chevrolet Tahoe 3Way Catalytic Convertor Assembly (W/ Exhaust Manifold P
Part Number: 25146769
Product Specifications
- Other Name: Converter Assembly, 3Way Catalytic (W/ Exhaust Manifold P; Converter
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 1995 Chevrolet Tahoe | CLASSIC 2 DOOR 1/2 TON | 8 Cyl 5.7L
View related parts
Chevrolet Tahoe 3Way Catalytic Convertor Assembly (W/ Exhaust Manifold P
Part Number: 25146029
Product Specifications
- Other Name: Converter Assembly, 3Way Catalytic (W/ Exhaust Manifold P; Converter
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 1995 Chevrolet Tahoe | CLASSIC 2 DOOR 1/2 TON, CLASSIC 4 DOOR 1/2 TON | 8 Cyl 5.7L
View related parts
Chevrolet Tahoe Oxidation Catalytic Converter Assembly
Part Number: 15991749
Product Specifications
- Other Name: Converter Assembly, Oxidation Catalytic; Converter
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 1995-1996 Chevrolet Tahoe | CLASSIC 2 DOOR 1/2 TON | 8 Cyl 6.5L Diesel

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Chevrolet Tahoe Catalytic Converter Parts Questions & Experts Answers

3Way Catalytic Convertor Assembly (W/ Exhaust Manifold P
25904628
Q: What is a catalytic converter and how do you diagnose and repair it?
A: A catalytic converter is an emission control device that reduces certain pollutants. There are two types of converters: an oxidation catalyst that reduces hydrocarbons and carbon monoxide, and a reduction catalyst that reduces oxides of nitrogen. Vehicles are equipped with two three-way catalysts that can reduce all three pollutants. Whenever you raise the vehicle to service underbody components, inspect the converter for leaks, corrosion, dents, and other damage. The easiest way to check for a restricted converter is to use a vacuum gauge to diagnose the effect of a blocked exhaust on the intake vacuum. To remove the converter, raise the vehicle and place it securely on jack stands, disconnect the electrical connectors for the upstream and downstream Oxygen Sensors, remove all four sensors, remove the nuts at each of the upper flanges that secure the front exhaust pipe assembly to the exhaust manifold flanges, remove the nuts that secure the rear flange of the front exhaust pipe assembly to the rest of the exhaust system, and remove the front exhaust pipe assembly. To install the converter, coat the threads of the nuts and bolts with an anti-seize compound to facilitate future removal and tighten the nuts that secure the front exhaust pipe assembly to the exhaust manifold and to the rest of the exhaust system securely.