How to replace a catalytic converter on 2003 Cadillac DeVille?

In order to have to change the catalytic converter, prop the exhaust system and raise up the vehicle. Dislodge the oxygen sensor and the nuts that are holding the catalytic converter. Gently remove the converter and de-gasket the converter. Cut the converter off the resonator inlet pipe and affix the new converter and fit it with the exhaust manifold.

OEM 2003 Cadillac DeVille Catalytic Converter

Cat. Converter

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3 Catalytic Converters found

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2003 Cadillac DeVille Exhaust Pipe Part Number: 12564240
$61.91 MSRP: $92.15
You Save: $30.24 (33%)
Product Specifications
- Other Name: Pipe, Exhaust Pipe; Crossover Pipe; Front Pipe; Cross Over Pipe
- Position: Front
- Replaces: 12556489
- Item Weight: 7.50 Pounds
- Item Dimensions: 26.3 x 14.2 x 5.4 inches
- Condition: New
- Fitment Type: Direct Replacement
- SKU: 12564240
- Warranty: This genuine part is guaranteed by GM's factory warranty.
More Info
Fits the following 2003 Cadillac DeVille Submodels:
- Base, Concours, d'Elegance, DHS, DTS, Protection Series | 8 Cyl 4.6 L GAS
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2003 Cadillac DeVille Catalytic Converter Part Number: 25727006
Product Specifications
- Other Name: Muffler Assembly-Exhaust (W/Exhaust & Tail Pipe & 3W; Exhaust Pipe; Muffler; Muffler Assembly; Converter & Pipe
- Item Weight: 67.50 Pounds
- Condition: New
- SKU: 25727006
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following 2003 Cadillac DeVille Submodels:
- Base, DHS, DTS | 8 Cyl 4.6 L GAS
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2003 Cadillac DeVille Exhaust Pipe Part Number: 25724154
Product Specifications
- Other Name: Pipe, Exhaust Pipe; Crossover Pipe; Front Pipe; Connector Pipe
- Position: Rear
- Item Weight: 8.20 Pounds
- Item Dimensions: 19.1 x 3.1 x 9.5 inches
- Condition: New
- Fitment Type: Direct Replacement
- SKU: 25724154
- Warranty: This genuine part is guaranteed by GM's factory warranty.
More Info
Fits the following 2003 Cadillac DeVille Submodels:
- Base, DHS, DTS, Protection Series | 8 Cyl 4.6 L GAS

2003 Cadillac DeVille Catalytic Converter

With a comprehensive array of OEM 2003 Cadillac DeVille Catalytic Converter, from fuel pumps to door handles, our website is a one-stop-shop for your needs. All our genuine 2003 Cadillac DeVille Catalytic Converter are backed by the manufacturer's warranty and are offered at competitive prices in the market. Rest assured, you can shop with complete confidence.

2003 Cadillac DeVille Catalytic Converter Parts and Q&A

Q: How to replace a catalytic converter on 2003 Cadillac DeVille?
A: In order to have to change the catalytic converter, prop the exhaust system and raise up the vehicle. Dislodge the oxygen sensor and the nuts that are holding the catalytic converter. Gently remove the converter and de-gasket the converter. Cut the converter off the resonator inlet pipe and affix the new converter and fit it with the exhaust manifold.