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 GMC Yukon Catalytic Converter

Cat. Converter

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46 Catalytic Converters found

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GMC Yukon 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
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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:
- 2015-2020 GMC Yukon | 1500 4 DOOR SUV, 1500 4 DOOR UTILITY, 4 DOOR, 4 DOOR SUV | 8 Cyl 6.2L
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GMC Yukon CONVERTER ASM,3WAY CTLTC(W/EXH PIPE)
Part Number: 19420288
$1838.28 MSRP: $2760.00
You Save: $921.72 (34%)
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Product Specifications
- Other Name: Catalytic Converter, Converter & Pipe
- Replaces: 23486656
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2016-2020 GMC Yukon | 1500 4 DOOR SUV, 1500 4 DOOR UTILITY, 4 DOOR | 8 Cyl 5.3L
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GMC Yukon CONVERTER ASM,W/UP 3WAY CTLTC (W/ EXH PIPE)
Part Number: 19420276
$1834.97 MSRP: $2755.00
You Save: $920.03 (34%)
ADD TO CART
Product Specifications
- Other Name: Catalytic Converter, Converter & Pipe
- Replaces: 20757674
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2015 GMC Yukon | 1500 4 DOOR SUV, 1500 4 DOOR UTILITY, 4 DOOR | 8 Cyl 5.3L
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GMC Yukon CONVERTER ASM,3WAY CTLTC(W/EXH PIPE)
Part Number: 19420284
$2518.55 MSRP: $3786.05
You Save: $1267.50 (34%)
Ships in 1-3 Business Days
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Product Specifications
- Other Name: Catalytic Converter, Converter & Pipe
- Replaces: 22948166
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2015 GMC Yukon | 1500 4 DOOR UTILITY, 4 DOOR, 4 DOOR SUV | 8 Cyl 6.2L
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GMC Yukon CONVERTER ASM,3WAY CTLTC (W/EXH MANIF PIPE)"KIT"
Part Number: 19418939
$1326.54 MSRP: $2996.63
You Save: $1670.09 (56%)
ADD TO CART
Product Specifications
- Other Name: Catalytic Converter, Converter & Pipe
- Replaces: 15127418, 25904628, 25824120
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2007-2008 GMC Yukon | 1/2 TON, YUKON XL/DENALI XL/ESCALADE ESV, YUKON/DENALI/ESCALADE | 8 Cyl 4.8L, 8 Cyl 5.3L, 8 Cyl 5.3L Flex, 8 Cyl 6.0L
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GMC Yukon CONVERTER ASM-3WAY CTLTC(W/EXH PIPE)
Part Number: 85542368
$1267.30 MSRP: $1979.40
You Save: $712.10 (36%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Catalytic Converter, Converter & Pipe
- Replaced by: 86781749
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2021-2023 GMC Yukon | , 1/2 TON, YUKON XL/DENALI XL/ESCALADE ESV, YUKON/DENALI/ESCALADE | 8 Cyl 5.3L
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GMC Yukon 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 GMC Yukon | 1/2 TON, YUKON XL/DENALI XL/ESCALADE ESV, YUKON/DENALI/ESCALADE | 8 Cyl 4.8L, 8 Cyl 5.3L, 8 Cyl 5.3L Flex, 8 Cyl 6.0L, 8 Cyl 6.2L
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GMC Yukon CONVERTER ASM,3WAY CTLTC (W/EXH MANIF PIPE) "KIT"
Part Number: 19420124
$946.55 MSRP: $1415.00
You Save: $468.45 (34%)
Ships in 1-3 Business Days
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Product Specifications
- Other Name: Catalytic Converter, Converter & Pipe, Front Pipe
- Replaces: 15754088, 15755463, 10395213
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2001-2006 GMC Yukon | 1/2 TON, XL 1/2 TON, YUKON/DENALI/ESCALADE | 8 Cyl 6.0L
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GMC Yukon CONVERTER ASM-3WAY CTLTC(W/EXH PIPE)
Part Number: 86781749
$1320.74 MSRP: $1979.40
You Save: $658.66 (34%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Replaces: 84557805, 84520354, 19420299, 84655074, 85542368
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2021-2024 GMC Yukon | 1/2 TON, YUKON XL/DENALI XL/ESCALADE ESV, YUKON/DENALI/ESCALADE | 8 Cyl 5.3L
View related parts
GMC Yukon 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 GMC Yukon | , 1/2 TON, YUKON/DENALI/ESCALADE | 8 Cyl 6.2L
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GMC Yukon 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: 15905948, 20854454
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2009-2014 GMC Yukon | 1/2 TON, YUKON XL/DENALI XL/ESCALADE ESV, YUKON/DENALI/ESCALADE | 8 Cyl 4.8L, 8 Cyl 5.3L, 8 Cyl 5.3L Flex, 8 Cyl 6.0L, 8 Cyl 6.0L Flex
View related parts
GMC Yukon CONVERTER ASM,3WAY CTLTC (W/EXH MANIF PIPE) "KIT"
Part Number: 19419599
$1741.19 MSRP: $2613.56
You Save: $872.37 (34%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Catalytic Converter, Converter & Pipe
- Replaces: 15896591
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2011-2014 GMC Yukon | 1/2 TON, YUKON XL/DENALI XL/ESCALADE ESV, YUKON/DENALI/ESCALADE | 8 Cyl 6.2L Flex
View related parts
GMC Yukon CONVERTER ASM,3WAY CTLTC (W/EXH MANIF PIPE)"KIT"
Part Number: 19418958
$2145.07 MSRP: $3416.66
You Save: $1271.59 (38%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Catalytic Converter, Converter & Pipe
- Replaces: 20854457, 25904626, 25904629
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2007-2010 GMC Yukon | 1/2 TON, YUKON XL/DENALI XL/ESCALADE ESV, YUKON/DENALI/ESCALADE | 8 Cyl 6.2L, 8 Cyl 6.2L Flex
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GMC Yukon CONVERTER ASM,3WAY CTLTC (W/EXH MANIF PIPE)"KIT"
Part Number: 19418926
$1724.85 MSRP: $2690.39
You Save: $965.54 (36%)
ADD TO CART
Product Specifications
- Other Name: Catalytic Converter, Converter & Pipe
- Replaces: 15896590, 20854453
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2009-2014 GMC Yukon | 1/2 TON, YUKON XL/DENALI XL/ESCALADE ESV, YUKON/DENALI/ESCALADE | 8 Cyl 4.8L, 8 Cyl 5.3L, 8 Cyl 5.3L Flex, 8 Cyl 6.0L, 8 Cyl 6.0L Flex
View related parts
GMC Yukon CONVERTER ASM,3WAY CTLTC (W/EXH MANIF PIPE) "KIT"
Part Number: 19420109
$1230.70 MSRP: $1843.58
You Save: $612.88 (34%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Catalytic Converter, Converter & Pipe, Front Pipe
- Replaces: 10395214, 15755464, 15754087
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2001-2006 GMC Yukon | 1/2 TON, XL 1/2 TON, YUKON/DENALI/ESCALADE | 8 Cyl 6.0L
View related parts
GMC Yukon CONVERTER ASM-NOX CTLTC (W/ FLTR)
Part Number: 40009042
$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:
- 2021-2022 GMC Yukon | , 1/2 TON, YUKON XL/DENALI XL/ESCALADE ESV, YUKON/DENALI/ESCALADE | 6 Cyl 3.0L Diesel
View related parts
GMC Yukon CONVERTER ASM-3WAY CTLTC(W/EXH PIPE)
Part Number: 85542367
$1018.72 MSRP: $1523.87
You Save: $505.15 (34%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2022-2024 GMC Yukon | , 1/2 TON, YUKON XL/DENALI XL/ESCALADE ESV | 8 Cyl 6.2L
View related parts
GMC Yukon 3Way Catalytic Convertor Assembly (W/ Exhaust Manifold P
Part Number: 22940415
$2490.54 MSRP: $4366.67
You Save: $1876.13 (43%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Other Name: Converter Assembly, 3Way Catalytic (W/ Exhaust Manifold P; Catalytic Converter, Converter & Pipe
- Replaces: 15905949
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2011-2014 GMC Yukon | 1/2 TON, YUKON XL/DENALI XL/ESCALADE ESV, YUKON/DENALI/ESCALADE | 8 Cyl 6.2L Flex
View related parts
GMC Yukon CONVERTER ASM,3WAY CTLTC (W/EXH MANIF PIPE) "KIT"
Part Number: 19420098
$992.35 MSRP: $1484.08
You Save: $491.73 (34%)
ADD TO CART
Product Specifications
- Other Name: Catalytic Converter, Converter & Pipe
- Replaces: 15782486, 19208464
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2006 GMC Yukon | 1/2 TON, YUKON/DENALI/ESCALADE | 8 Cyl 4.8L, 8 Cyl 5.3L, 8 Cyl 5.3L Flex
View related parts
GMC Yukon CONVERTER ASM-NOX CTLTC (W/ FLTR)
Part Number: 40009139
$835.65 MSRP: $1247.73
You Save: $412.08 (34%)
ADD TO CART
Product Specifications
- Other Name: Catalytic Converter, Diesel Particulate Filter
- Replaces: 12696443, 12709334, 12700216, 12698485, 12694479, 40009042
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2021-2024 GMC Yukon | 1/2 TON, YUKON XL/DENALI XL/ESCALADE ESV, YUKON/DENALI/ESCALADE | 6 Cyl 3.0L Diesel

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1-20 of 46 Results

GMC Yukon Catalytic Converter

The Catalytic Converter in GMC Yukon automobiles is a vital part of the emission control system which changes toxic gases that are CO, HC, NOx and deposition them into less toxic products which include H2O, CO2, and Nitrogen. These converters have a honeycomb core and function via the use of catalysts such as platinum, palladium, and rhodium to initiate chemical reactions thus eliminating the emissions. Several reasons may cause converter failure and include engine related difficulties, impacts, or clogging hence leading a faulty converter with poor efficiency and high pollutant rates. GMC has powertrain converters that allow for maximum engine performance for different vehicles with available direct fit and universal converters. In general, Catalytic Converters provide significant contribution to minimize the emission of Harmful gases and maintain a standard for emission control in GMC Yukon vehicles.

Each OEM GMC Yukon 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.

GMC Yukon Catalytic Converter Parts Questions & Experts Answers

3Way Catalytic Convertor Assembly (W/ Exhaust Manifold P
20854453
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.

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