What is the purpose of a catalytic converter and how can you diagnose and repair a malfunctioning one?

The catalytic converter is an emission control device added to the exhaust system to reduce pollutants from the exhaust gas stream. A three-way (reduction) catalyst design is used. The catalytic coating on the three-way catalyst contains platinum and rhodium, which lowers the levels of oxides of nitrogen (NOx) as well as hydrocarbons (HC) and carbon monoxide (CO). The test equipment for a catalytic converter is expensive and highly sophisticated. If you suspect that the converter on your vehicle is malfunctioning, take it to a dealer or authorized emissions inspection facility for diagnosis and repair. Whenever the vehicle is raised for servicing of underbody components, check the converter for leaks, corrosion, dents and other damage. Check the flange bolts that attach the front and rear ends of the converter to the exhaust system. If damage is discovered, the converter should be replaced. A catalytic converter may become plugged. 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. Connect a vacuum gauge to an intake manifold vacuum source. Warm the engine to operating temperature, place the transmission in Park and apply the parking brake. Note and record the vacuum reading at idle. Open the throttle until the engine speed is about 2000 rpm. Release the throttle quickly and record the vacuum reading. Perform the test three more times, recording the reading after each test. If the reading after the fourth test is more than one in-Hg lower than the reading recorded at idle, the catalytic converter, muffler or exhaust pipes may be clogged or restricted. Raise the vehicle and support it securely on jackstands. Disconnect the electrical connectors from the oxygen sensors. Remove the catalytic converter-to-exhaust pipe flange bolts and separate the exhaust pipe from the catalytic converter. Support the exhaust pipe. Remove the bolts and detach the catalytic converter header pipe from the exhaust manifold. Remove the catalytic converter and pipe assembly. Clean the carbon deposits from the mounting flanges and install new gaskets. Installation is the reverse of removal.

Genuine Chevrolet K1500 Catalytic Converter

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13 Catalytic Converters found

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Chevrolet K1500 3Way Catalytic Convertor (W/Exhaust Manifold Pipe)
Part Number: 15746547
$1829.79 MSRP: $2747.21
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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:
- 1996-1999 Chevrolet K1500 | K1500 EXTENDED CAB LONG BOX, K1500 EXTENDED CAB STANDARD BOX, K1500 REGULAR CAB LONG BOX, K1500 REGULAR CAB STANDARD BOX | 8 Cyl 5.7L
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Chevrolet K1500 Catalytic Convertor
Part Number: 25143149
Product Specifications
- Other Name: Converter, Catalytic Converter
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 1993 Chevrolet K1500 | K1500 REGULAR CAB LONG BOX, K1500 REGULAR CAB STANDARD BOX | 8 Cyl 5.7L
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Chevrolet K1500 Catalytic Convertor
Part Number: 25143153
Product Specifications
- Other Name: Converter
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 1993 Chevrolet K1500 | K1500 REGULAR CAB LONG BOX, K1500 REGULAR CAB STANDARD BOX | 6 Cyl 4.3L, 8 Cyl 5.0L
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Chevrolet K1500 3Way Catalytic Convertor Assembly (W/ Exhaust Manifold P
Part Number: 25146767
Product Specifications
- Other Name: Converter Assembly, 3Way Catalytic (W/ Exhaust Manifold P
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 1994-1995 Chevrolet K1500 | K1500 EXTENDED CAB LONG BOX, K1500 EXTENDED CAB STANDARD BOX, K1500 REGULAR CAB LONG BOX, K1500 REGULAR CAB STANDARD BOX | 6 Cyl 4.3L, 8 Cyl 5.0L, 8 Cyl 5.7L
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Chevrolet K1500 Catalytic Converter
Part Number: 25131614
Product Specifications
- Other Name: Twc Converter; Converter
- Replaces: 25104275
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 1988-1993 Chevrolet K1500 | K1500 EXTENDED CAB LONG BOX, K1500 EXTENDED CAB STANDARD BOX, K1500 REGULAR CAB LONG BOX, K1500 REGULAR CAB STANDARD BOX | 6 Cyl 4.3L, 8 Cyl 5.0L
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Chevrolet K1500 Catalytic Converter Assembly
Part Number: 25143439
Product Specifications
- Other Name: Converter Assembly, Catalytic; Catalytic Converter, Converter
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 1988-1993 Chevrolet K1500 | K1500 EXTENDED CAB LONG BOX, K1500 EXTENDED CAB STANDARD BOX, K1500 REGULAR CAB LONG BOX, K1500 REGULAR CAB STANDARD BOX | 6 Cyl 4.3L, 8 Cyl 5.0L
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Chevrolet K1500 3-Way Catalytic Convertor Assembly (W/ Exhaust Rear Man
Part Number: 25170656
Product Specifications
- Other Name: Converter Asm,3Way Catalytic (W/ Exhaust Manifold; Catalytic Converter, Converter
- Position: Rear
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 1996-1997 Chevrolet K1500 | K1500 EXTENDED CAB LONG BOX, K1500 EXTENDED CAB STANDARD BOX, K1500 REGULAR CAB LONG BOX | 8 Cyl 5.0L
View related parts
Chevrolet K1500 3Way Catalytic Convertor Assembly (W/ Exhaust Manifold P
Part Number: 25145198
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:
- 1994-1995 Chevrolet K1500 | K1500 EXTENDED CAB LONG BOX, K1500 EXTENDED CAB STANDARD BOX, K1500 REGULAR CAB LONG BOX, K1500 REGULAR CAB STANDARD BOX | 6 Cyl 4.3L, 8 Cyl 5.0L, 8 Cyl 5.7L
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Chevrolet K1500 3-Way Catalytic Convertor Assembly
Part Number: 25312171
Product Specifications
- Other Name: Converter Asm,3Way Catalytic; Converter
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 1998-1999 Chevrolet K1500 | K1500 EXTENDED CAB LONG BOX, K1500 EXTENDED CAB STANDARD BOX, K1500 REGULAR CAB LONG BOX, K1500 REGULAR CAB STANDARD BOX | 8 Cyl 5.0L
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Chevrolet K1500 3-Way Catalytic Convertor Assembly (W/ Exhaust Rear Man
Part Number: 25170655
Product Specifications
- Other Name: Converter Asm,3Way Catalytic (W/ Exhaust Manifold; Catalytic Converter, Front Pipe
- Position: Rear
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 1996-1997 Chevrolet K1500 | K1500 EXTENDED CAB LONG BOX, K1500 EXTENDED CAB STANDARD BOX, K1500 REGULAR CAB LONG BOX, K1500 REGULAR CAB STANDARD BOX | 6 Cyl 4.3L, 8 Cyl 5.0L
View related parts
Chevrolet K1500 3-Way Catalytic Convertor Assembly
Part Number: 25312170
Product Specifications
- Other Name: Converter Asm,3Way Catalytic; Front Pipe
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 1998 Chevrolet K1500 | K1500 EXTENDED CAB STANDARD BOX, K1500 REGULAR CAB LONG BOX, K1500 REGULAR CAB STANDARD BOX | 6 Cyl 4.3L
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Chevrolet K1500 Oxidation Catalytic Converter Assembly
Part Number: 15991754
Product Specifications
- Other Name: Converter Assembly, Oxidation Catalytic
- Replaces: 25144427
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 1994-1998 Chevrolet K1500 | K1500 EXTENDED CAB LONG BOX, K1500 EXTENDED CAB STANDARD BOX, K1500 REGULAR CAB LONG BOX | 8 Cyl 6.5L Diesel
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Chevrolet K1500 3-Way Catalytic Convertor Assembly
Part Number: 88968527
Product Specifications
- Other Name: Converter Asm,3Way Catalytic ; Converter, Catalytic Converter; Catalytic Converter, Converter
- Replaces: 25131438, 25130005, 25143420, 25130001
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 1988-1993 Chevrolet K1500 | K1500 EXTENDED CAB LONG BOX, K1500 EXTENDED CAB STANDARD BOX, K1500 REGULAR CAB LONG BOX, K1500 REGULAR CAB STANDARD BOX | 8 Cyl 5.7L

Chevrolet K1500 Catalytic Converter Parts Questions & Experts Answers

3Way Catalytic Convertor (W/Exhaust Manifold Pipe)
15746547
Q: What is the purpose of a catalytic converter and how can you diagnose and repair a malfunctioning one?
A: The catalytic converter is an emission control device added to the exhaust system to reduce pollutants from the exhaust gas stream. A three-way (reduction) catalyst design is used. The catalytic coating on the three-way catalyst contains platinum and rhodium, which lowers the levels of oxides of nitrogen (NOx) as well as hydrocarbons (HC) and carbon monoxide (CO). The test equipment for a catalytic converter is expensive and highly sophisticated. If you suspect that the converter on your vehicle is malfunctioning, take it to a dealer or authorized emissions inspection facility for diagnosis and repair. Whenever the vehicle is raised for servicing of underbody components, check the converter for leaks, corrosion, dents and other damage. Check the flange bolts that attach the front and rear ends of the converter to the exhaust system. If damage is discovered, the converter should be replaced. A catalytic converter may become plugged. 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. Connect a vacuum gauge to an intake manifold vacuum source. Warm the engine to operating temperature, place the transmission in Park and apply the parking brake. Note and record the vacuum reading at idle. Open the throttle until the engine speed is about 2000 rpm. Release the throttle quickly and record the vacuum reading. Perform the test three more times, recording the reading after each test. If the reading after the fourth test is more than one in-Hg lower than the reading recorded at idle, the catalytic converter, muffler or exhaust pipes may be clogged or restricted. Raise the vehicle and support it securely on jackstands. Disconnect the electrical connectors from the Oxygen Sensors. Remove the catalytic converter-to-exhaust pipe flange bolts and separate the exhaust pipe from the catalytic converter. Support the exhaust pipe. Remove the bolts and detach the catalytic converter header pipe from the exhaust manifold. Remove the catalytic converter and pipe assembly. Clean the carbon deposits from the mounting flanges and install new gaskets. Installation is the reverse of removal.

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