How to service the catalytic converter on those weighing 8600 lbs and above on GMC C3500?

To access the Catalytic Converter on cars of 8600 lbs or more, you must raise and secure the car first. After unplugging the Oxygen Sensor wires, remove the nuts screwed into the y-pipe flat flange, then remove the nuts, studs and flange seals from the y-pipe and Exhaust Manifold. After that, take out the y-pipe and Catalytic Converter assembly as well as the Muffler. First, set the flange seals onto the y-pipe and Catalytic Converter on the Exhaust Manifold, then put the studs in and tighten them to 22 n.m (16 lb ft). Put on the exhaust nuts where the studs meet the Exhaust Manifold and tighten them to 64 n.m (47 lb ft). Relocate the Muffler and Catalytic Converter assembly, put the y-pipe and Catalytic Converter into the proper place on the flat flange and put the nuts on the flat flange studs, securing them to 64 n.m (47 lb ft) of torque. Once finished, secure the Oxygen Sensor connections, look for proper space and alignment and bring the car down.

OEM GMC C3500 Catalytic Converter

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15 Catalytic Converters found

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GMC C3500 Front Pipe Part Number: 25312170
Product Specifications
- Other Name: Converter, Catalytic Converter; Exhaust Pipe; Converter, Exhaust Pipe
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 1998 GMC C3500 | Sierra SL, Sierra SLE, Sierra SLT | 8 Cyl 5.7 L CNG, 8 Cyl 5.7 L GAS, 8 Cyl 6.5 L DIESEL, 8 Cyl 7.4 L GAS
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GMC C3500 Catalytic Converter Part Number: 25170655
Product Specifications
- Other Name: Converter, 3Way Catalytic; Exhaust Pipe; Front Pipe; Converter, Catalytic Converter; Converter, Exhaust Pipe
- Position: Rear
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 1996-1997 GMC C3500 | Sierra SL, Sierra SLE, Sierra SLT | 8 Cyl 5.7 L CNG, 8 Cyl 5.7 L GAS, 8 Cyl 6.5 L DIESEL, 8 Cyl 7.4 L GAS
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GMC C3500 Catalytic Converter Part Number: 25056778
Product Specifications
- Other Name: Converter, Catalytic Converter; Converter
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 1984-1986 GMC C3500 | Base, High Sierra, Sierra Classic | 6 Cyl 4.8 L GAS, 8 Cyl 5.0 L GAS, 8 Cyl 5.7 L GAS
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GMC C3500 Catalytic Converter Part Number: 15975251
Product Specifications
- Other Name: Converter
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 1996 GMC C3500 | Sierra SL, Sierra SLE, Sierra SLT | 8 Cyl 5.7 L GAS
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GMC C3500 Catalytic Converter Part Number: 15733231
Product Specifications
- Other Name: Converter Assembly-Catalytic (W/Exhaust Manifold Pipe T; Converter; Converter, Catalytic Converter; Converter, Exhaust Pipe
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 1997-2000 GMC C3500 | Sierra SL, Sierra SLE, Sierra SLT | 8 Cyl 5.7 L CNG, 8 Cyl 5.7 L GAS
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GMC C3500 Catalytic Converter Part Number: 12547190
Product Specifications
- Other Name: Converter, Catalytic Converter
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 1991-1995 GMC C3500 | Sierra, Sierra SL, Sierra SLE, Sierra SLT, Sierra SLX | 8 Cyl 7.4 L GAS
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GMC C3500 Converter Part Number: 19420113
$1838.04 MSRP: $2747.21
You Save: $909.17 (34%)
Product Specifications
- Other Name: Converter Assembly, 3Way Catalytic (W/Exhaust Manifold Pipe) "Kit"; Converter, Catalytic Converter; Converter, Exhaust Pipe
- Replaces: 15746547, 15042331, 15739825
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 1996-1999 GMC C3500 | Sierra SL, Sierra SLE, Sierra SLT | 8 Cyl 5.7 L CNG, 8 Cyl 5.7 L GAS
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GMC C3500 Catalytic Converter Part Number: 88968527
Product Specifications
- Other Name: Converter, Catalytic Converter; Converter
- Replaces: 25131438, 25130001, 25130005, 25143420
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 1988-1995 GMC C3500 | Sierra, Sierra SL, Sierra SLE, Sierra SLT, Sierra SLX | 8 Cyl 5.7 L GAS, 8 Cyl 6.5 L DIESEL, 8 Cyl 7.4 L GAS
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GMC C3500 Catalytic Converter Part Number: 25100464
Product Specifications
- Other Name: Converter, Catalytic Converter; Converter
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 1988-1989 GMC C3500 | Sierra, Sierra SLE, Sierra SLX | 8 Cyl 7.4 L GAS
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GMC C3500 Catalytic Converter Part Number: 25100463
Product Specifications
- Other Name: Converter, Catalytic Converter; Converter
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 1988-1989 GMC C3500 | Sierra, Sierra SLE, Sierra SLX | 8 Cyl 7.4 L GAS
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GMC C3500 Converter Part Number: 25100276
Product Specifications
- Other Name: Converter, Catalytic Converter; Catalytic Converter
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 1988-1989 GMC C3500 | Sierra, Sierra SLE, Sierra SLX | 8 Cyl 7.4 L GAS
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GMC C3500 Converter Part Number: 15991752
Product Specifications
- Other Name: Converter, Catalytic Converter; Converter, Exhaust Pipe; Catalytic Converter
- Replaces: 25144421
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 1997-2000 GMC C3500 | Sierra SL, Sierra SLE, Sierra SLT | 8 Cyl 6.5 L DIESEL
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GMC C3500 Catalytic Converter Part Number: 15991751
Product Specifications
- Other Name: Converter, Catalytic Converter; Converter, Exhaust Pipe
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 1997-2000 GMC C3500 | Sierra SL, Sierra SLE, Sierra SLT | 8 Cyl 6.5 L DIESEL
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GMC C3500 Converter & Pipe Part Number: 15733230
Product Specifications
- Other Name: Converter Assembly-Catalytic (W/Exhaust Manifold Pipe T; Catalytic Converter; Exhaust Pipe; Converter; Converter, Catalytic Converter; Converter, Exhaust Pipe
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 1996-2000 GMC C3500 | Sierra SL, Sierra SLE, Sierra SLT | 8 Cyl 7.4 L GAS
View related parts
GMC C3500 Catalytic Converter Part Number: 15733229
Product Specifications
- Other Name: Converter Assembly-Catalytic (W/Exhaust Manifold Pipe T; Converter, Catalytic Converter; Converter, Exhaust Pipe
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 1998-2000 GMC C3500 | Sierra SL, Sierra SLE, Sierra SLT | 8 Cyl 7.4 L GAS

GMC C3500 Catalytic Converter

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The emissions system in GMC C3500 automobiles can never be complete without the presence of the car's GMC C3500 Catalytic Converter with credibility for its operation and durability. Their duty entails the conversion of noxious fumes, including Carbon Monoxide, Hydrocarbons, and Oxides of Nitrogen, into less toxic substances including water, Carbon Dioxide, and Nitrogen which helps increase the vehicle's efficiency and safety. The catalytic converter is suitable for different types of GMC C3500 to keep up with high emission standards as well as delivering the optimal performance of the vehicle's engine. These are constructing elements such as platinum, palladium, rhodium that assist vital chemical reactions are called catalysts. Thus, the employment of the GMC C3500 Catalytic Converter makes it unique from other automobiles in the market because its durability reduces the probability of failure from the engine challenges or choked status, which if hiked, denote a Check Engine light. Also, the-layout of the catalytic converter in relation to the location of the vehicle also enable high flow and efficiency in oxidation and reduction hence being a popular product among GMC C3500 drivers who seek improved vehicle performance. Its direct fit option makes the GMC C3500 Catalytic Converter not only reliable in terms of compatibility with other models but also of immense importance in the enhancement of the entire lifespan and dependability of the vehicle, and these are some of the qualities that make people call it one of the most useful parts of the GMC C3500.

GMC C3500 Catalytic Converter Parts Questions & Experts Answers

Converter & Pipe
15733230
Q: How to service the catalytic converter on those weighing 8600 lbs and above on GMC C3500?
A:
To access the Catalytic Converter on cars of 8600 lbs or more, you must raise and secure the car first. After unplugging the Oxygen Sensor wires, remove the nuts screwed into the y-pipe flat flange, then remove the nuts, studs and flange seals from the y-pipe and Exhaust Manifold. After that, take out the y-pipe and Catalytic Converter assembly as well as the Muffler. First, set the flange seals onto the y-pipe and Catalytic Converter on the Exhaust Manifold, then put the studs in and tighten them to 22 n.m (16 lb ft). Put on the exhaust nuts where the studs meet the Exhaust Manifold and tighten them to 64 n.m (47 lb ft). Relocate the Muffler and Catalytic Converter assembly, put the y-pipe and Catalytic Converter into the proper place on the flat flange and put the nuts on the flat flange studs, securing them to 64 n.m (47 lb ft) of torque. Once finished, secure the Oxygen Sensor connections, look for proper space and alignment and bring the car down.