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GMC PartsGMC Sierra 2500 PartsCatalytic Converter

GMC Sierra 2500 Catalytic Converter

You enjoy taking care of your Sierra 2500.

Select Your VehicleYour GMC dealership isn't the only place to locate trusted repair parts to fix your Sierra 2500. Obviously, you didn't buy your Sierra 2500 unless you knew that you wanted performance and great value both impeccably combined into one vehicle. You bought your Sierra 2500 because its dependability and trusted quality struck a chord inside you; so why would you settle for second rate when it comes to the highest quality auto parts? While it's not hard to find replacement parts for GMC vehicles, these days only the absolute best are required to maintain your car or truck.

The function and purpose of Catalytic Converter.

Achieving maximum fuel efficiency while reducing emissions on your car or truck depends on how well you maintain your engine and exhaust parts. Your GMC Sierra 2500 catalytic converter has been installed thanks to a federal mandate that is decades old. Inside every catalytic converter are cells made from platinum and/or rhodium arranged in a honeycomb pattern that change the harmful emissions of your GMC Sierra 2500 from carbon monoxide and hydrocarbons to carbon dioxide and water. This process revolutionized automakers' ability to improve air quality, which is why every vehicle made today has a catalytic converter.

Any car parts you need .

Don't let a broken Catalytic Converter spell the end of your car, truck, or SUV, and don't risk lowering its resale value by using anything but the best repair parts. At Car Parts Discount, we have live customer service members on the phone with enough expertise to help you buy the correct GMC Sierra 2500 part for your project or repair. Procuring new GMC parts from www.carpartsdiscount.com means you are getting the best deal on the most superior original and aftermarket replacement Sierra 2500 parts on the internet. When it comes to GMC Sierra 2500 Catalytic Converter parts, you can find them for 2004, 2003, 2002, 2001, 2000, 1999 models by clicking the appropriate year below.

Info: Select your make and model in the red title bar above so we can show the parts you need.
Select Your Year
GMC Sierra 2500 Catalytic Converter, OEM: 83166Eastern Catalytic
1999-2000 GMC Sierra 2500 Eastern Catalytic Catalytic Converter 83166
64.05, Save 39%   POPULAR
OEM: 83166, Item: 1005400
  In Stock, Usually ships within 1 business day
Select year, make, model above to verify this part fits your vehicle

GMC Sierra 2500 EPA Ultra Universal Converter, OEM: 93253Walker
1999-2002 GMC Sierra 2500 Walker EPA Ultra Universal Converter 93253
80.25, Save 39%  
OEM: 93253, Item: 669306
  Only 2 left In Stock, Usually ships within 1-2 business days
Select year, make, model above to verify this part fits your vehicle

Vehicle Install Locations: Left, Right

GMC Sierra 2500 Catalytic Converter, OEM: 99006HM
1999-2000 GMC Sierra 2500 Magnaflow Catalytic Converter 99006HM
Add for Price, Save 21%   NEW ITEM
OEM: 99006HM, Item: 1256389
  Only 4 left In Stock, Usually ships within 1-2 business days

If C.A.R.B. number is not provided, item is not California legal

Select year, make, model above to verify this part fits your vehicle

Vehicle Install Locations: Left, Right

GMC Sierra 2500 Catalytic Converter, OEM: 99009HM
2001-2002 GMC Sierra 2500 Magnaflow Catalytic Converter 99009HM
Add for Price, Save 21%   NEW ITEM
OEM: 99009HM, Item: 1256391
  Only 1 left In Stock, Usually ships within 1-2 business days

If C.A.R.B. number is not provided, item is not California legal

Select year, make, model above to verify this part fits your vehicle

Vehicle Install Locations: Left, Right

GMC Sierra 2500 Universal Catalytic Converter, OEM: 93238Walker
2001-2002 GMC Sierra 2500 Walker Universal Catalytic Converter 93238
74.55, Save 49%   NEW ITEMPOPULAR
OEM: 93238, Item: 358370
  In Stock, Usually ships within 1 business day

Installation of this aftermarket catalytic converter is prohibited by law in California by C.A.R.B., and may also not comply with emissions regulations in other municipalities in other parts of the US and Canada. Before purchasing a new catalytic converter, consult your local regulatory agency, emissions testing facility, or mechanic for approval. Federal laws require all warranty claims be processed by the manufacturer of this emissions control device. Please contact Walker directly for.. (more)

Select year, make, model above to verify this part fits your vehicle

Vehicle Install Locations: Right

GMC Sierra 2500 Universal Catalytic Converter, OEM: 93239Walker
1999-2002 GMC Sierra 2500 Walker Universal Catalytic Converter 93239
93.75, Save 39%  
OEM: 93239, Item: 358371
  In Stock, Usually ships within 1 business day

Installation of this aftermarket catalytic converter is prohibited by law in California by C.A.R.B., and may also not comply with emissions regulations in other municipalities in other parts of the US and Canada. Before purchasing a new catalytic converter, consult your local regulatory agency, emissions testing facility, or mechanic for approval. Federal laws require all warranty claims be processed by the manufacturer of this emissions control device. Please contact Walker directly for.. (more)

Select year, make, model above to verify this part fits your vehicle

Vehicle Install Locations: Right

GMC Sierra 2500 Catalytic Converter, OEM: 51006
1999-2000 GMC Sierra 2500 Magnaflow Catalytic Converter 51006
Add for Price, Save 21%   NEW ITEM
OEM: 51006, Item: 1256799
  Only 3 left In Stock, Usually ships within 1-2 business days

If C.A.R.B. number is not provided, item is not California legal

Select year, make, model above to verify this part fits your vehicle

Vehicle Install Locations: Left, Right

GMC Sierra 2500 Catalytic Converter, OEM: 447209
2001, 2003 GMC Sierra 2500 Magnaflow Catalytic Converter 447209
Add for Price, Save 22%   POPULAR
OEM: 447209, Item: 1226665
  Only 5 left In Stock, Usually ships within 1 business day
Select year, make, model above to verify this part fits your vehicle

Vehicle Install Locations: Rear Left, Rear Right

GMC Sierra 2500 Catalytic Converter, OEM: 51009
2001-2002 GMC Sierra 2500 Magnaflow Catalytic Converter 51009
Add for Price, Save 25%   NEW ITEM
OEM: 51009, Item: 1257262
  In Stock, Usually ships within 1-2 business days

If C.A.R.B. number is not provided, item is not California legal

Select year, make, model above to verify this part fits your vehicle

Vehicle Install Locations: Left, Right

GMC Sierra 2500 Catalytic Converter, OEM: 445006
1999-2000 GMC Sierra 2500 Magnaflow Catalytic Converter 445006
Add for Price, Save 11%   POPULAR
OEM: 445006, Item: 1226563
  In Stock, Usually ships within 1 business day
Select year, make, model above to verify this part fits your vehicle

Vehicle Install Locations: Left, Right

GMC Sierra 2500 Catalytic Converter, OEM: 445009
2004 GMC Sierra 2500 Magnaflow Catalytic Converter 445009
Add for Price, Save 10%   NEW ITEM
OEM: 445009, Item: 1226564
  Only 2 left In Stock, Usually ships within 1 business day
Select year, make, model above to verify this part fits your vehicle

Vehicle Install Locations: Front Left, Front Right, Rear Left, Rear Right

GMC Sierra 2500 Catalytic Converter, OEM: 640003Eastern Catalytic
1999-2000 GMC Sierra 2500 Eastern Catalytic Catalytic Converter 640003
145.25, Save 39%   NEW ITEM
OEM: 640003, Item: 1431855
  Only 5 left In Stock, Usually ships within 1 business day
Select year, make, model above to verify this part fits your vehicle

Vehicle Install Locations: Left Center, Right Center

Flowmaster
2002, 2004 GMC Sierra 2500 Flowmaster Catalytic Converter 910005R
147.35, Save 39%   NEW ITEM
OEM: 910005R, Item: 1444646
  In Stock, Usually ships within 1-2 business days
Select year, make, model above to verify this part fits your vehicle

Vehicle Install Locations: Rear

GMC Sierra 2500 Catalytic Converter, OEM: 640012Eastern Catalytic
1999-2000 GMC Sierra 2500 Eastern Catalytic Catalytic Converter 640012
158.85, Save 39%   NEW ITEM
OEM: 640012, Item: 1431858
  Only 4 left In Stock, Usually ships within 1 business day
Select year, make, model above to verify this part fits your vehicle

Vehicle Install Locations: Left Center, Right Center

GMC Sierra 2500 Universal Catalytic Converter, OEM: 81713Walker
1999-2000 GMC Sierra 2500 Walker Universal Catalytic Converter 81713
165.45, Save 39%   NEW ITEM
OEM: 81713, Item: 436328
  Only 1 left In Stock, Usually ships within 1 business day

This catalytic converter is compliant with C.A.R.B. rules, restrictions, and specifications. It can be installed on a vehicle in California as well as other municipalities that use this emissions standard. Before purchasing a new catalytic converter, consult your local regulatory agency, emissions testing facility, or mechanic for approval. Federal laws require all warranty claims be processed by the manufacturer of this emissions control device. Please contact Walker directly for replacement.. (more)

Select year, make, model above to verify this part fits your vehicle

Vehicle Install Locations: Left, Right

GMC Sierra 2500 Catalytic Converter, OEM: 81714Walker
1999-2000 GMC Sierra 2500 Walker Catalytic Converter 81714
168.05, Save 39%   NEW ITEM
OEM: 81714, Item: 1147951
  Only 6 left In Stock, Usually ships within 1 business day
Select year, make, model above to verify this part fits your vehicle

Vehicle Install Locations: Left, Right

GMC Sierra 2500 Catalytic Converter, OEM: 81724Walker
2001-2004 GMC Sierra 2500 Walker Catalytic Converter 81724
168.05, Save 39%   NEW ITEM
OEM: 81724, Item: 1147955
  In Stock, Usually ships within 1 business day
Select year, make, model above to verify this part fits your vehicle

Vehicle Install Locations: Front Left, Front Right, Rear Left, Rear Right

GMC Sierra 2500 Catalytic Converter, OEM: 447109
2001, 2003 GMC Sierra 2500 Magnaflow Catalytic Converter 447109
Add for Price, Save 21%   NEW ITEM
OEM: 447109, Item: 1226618
  Only 1 left In Stock, Usually ships within 1 business day
Select year, make, model above to verify this part fits your vehicle

Vehicle Install Locations: Front Left, Front Right

GMC Sierra 2500 Catalytic Converter, OEM: 24148
1999-2000 GMC Sierra 2500 Magnaflow Catalytic Converter 24148
Add for Price, Save 21%   NEW ITEM
OEM: 24148, Item: 1258215
  Only 3 left In Stock, Usually ships within 1-2 business days

If C.A.R.B. number is not provided, item is not California legal

Select year, make, model above to verify this part fits your vehicle

Vehicle Install Locations: Right

GMC Sierra 2500 Catalytic Converter, OEM: 24147
1999-2000 GMC Sierra 2500 Magnaflow Catalytic Converter 24147
Add for Price, Save 21%   NEW ITEM
OEM: 24147, Item: 1258214
  Only 5 left In Stock, Usually ships within 1-2 business days

If C.A.R.B. number is not provided, item is not California legal

Select year, make, model above to verify this part fits your vehicle

Vehicle Install Locations: Left

GMC Sierra 2500 Catalytic Converter, OEM: 93622
2001-2002 GMC Sierra 2500 Magnaflow Catalytic Converter 93622
Add for Price, Save 21%   NEW ITEM
OEM: 93622, Item: 1258919
  In Stock, Usually ships within 1-2 business days

If C.A.R.B. number is not provided, item is not California legal

Select year, make, model above to verify this part fits your vehicle

Vehicle Install Locations: Left

GMC Sierra 2500 Catalytic Converter, OEM: 079-5167/0795167Bosal
2001-2002 GMC Sierra 2500 Bosal Catalytic Converter 079-5167
303.65, Save 39%   NEW ITEM
OEM: 079-5167, Item: 1244303
  Only 6 left In Stock, Usually ships within 1 business day
Select year, make, model above to verify this part fits your vehicle

Vehicle Install Locations: Left

GMC Sierra 2500 Catalytic Converter, OEM: 079-5166/0795166Bosal
2001-2002 GMC Sierra 2500 Bosal Catalytic Converter 079-5166
311.45, Save 39%   NEW ITEM
OEM: 079-5166, Item: 1244302
  Only 2 left In Stock, Usually ships within 1 business day
Select year, make, model above to verify this part fits your vehicle

Vehicle Install Locations: Right

GMC Sierra 2500 Catalytic Converter, OEM: 50435Eastern Catalytic
2001-2002 GMC Sierra 2500 Eastern Catalytic Catalytic Converter 50435
357.05, Save 39%   NEW ITEM
OEM: 50435, Item: 1350118
  Only 1 left In Stock, Usually ships within 1 business day
Select year, make, model above to verify this part fits your vehicle

Vehicle Install Locations: Left

GMC Sierra 2500 EPA Ultra Direct Fit Converter, OEM: 53738Walker
1999-2000 GMC Sierra 2500 Walker EPA Ultra Direct Fit Converter 53738
361.75, Save 39%   NEW ITEM
OEM: 53738, Item: 564682
  Only 2 left In Stock, Usually ships within 1 business day
Select year, make, model above to verify this part fits your vehicle

Vehicle Install Locations: Right

GMC Sierra 2500 Catalytic Converter, OEM: 55335Walker
1999-2002 GMC Sierra 2500 Walker Catalytic Converter 55335
362.05, Save 39%   NEW ITEM
OEM: 55335, Item: 358250
  In Stock, Usually ships within 1 business day

Installation of this aftermarket catalytic converter is prohibited by law in California by C.A.R.B., and may also not comply with emissions regulations in other municipalities in other parts of the US and Canada. Before purchasing a new catalytic converter, consult your local regulatory agency, emissions testing facility, or mechanic for approval. Federal laws require all warranty claims be processed by the manufacturer of this emissions control device. Please contact Walker directly for.. (more)

Select year, make, model above to verify this part fits your vehicle

Vehicle Install Locations: Left

GMC Sierra 2500 Catalytic Converter, OEM: 93419
1999-2000 GMC Sierra 2500 Magnaflow Catalytic Converter 93419
Add for Price, Save 19%   NEW ITEM
OEM: 93419, Item: 1256928
  Only 3 left In Stock, Usually ships within 1-2 business days

If C.A.R.B. number is not provided, item is not California legal

Select year, make, model above to verify this part fits your vehicle

GMC Sierra 2500 EPA Ultra Direct Fit Converter, OEM: 50511Walker
1999-2000 GMC Sierra 2500 Walker EPA Ultra Direct Fit Converter 50511
364.25, Save 39%   NEW ITEM
OEM: 50511, Item: 660592
  In Stock, Usually ships within 1-2 business days
Select year, make, model above to verify this part fits your vehicle

GMC Sierra 2500 Catalytic Converter, OEM: 93623
2001-2002 GMC Sierra 2500 Magnaflow Catalytic Converter 93623
Add for Price, Save 21%   NEW ITEM
OEM: 93623, Item: 1258920
  Only 3 left In Stock, Usually ships within 1-2 business days

If C.A.R.B. number is not provided, item is not California legal

Select year, make, model above to verify this part fits your vehicle

Vehicle Install Locations: Right

GMC Sierra 2500 Catalytic Converter, OEM: 55557Walker
2004 GMC Sierra 2500 Walker Catalytic Converter 55557
374.35, Save 39%   NEW ITEM
OEM: 55557, Item: 358278
  In Stock, Usually ships within 1 business day

Installation of this aftermarket catalytic converter is prohibited by law in California by C.A.R.B., and may also not comply with emissions regulations in other municipalities in other parts of the US and Canada. Before purchasing a new catalytic converter, consult your local regulatory agency, emissions testing facility, or mechanic for approval. Federal laws require all warranty claims be processed by the manufacturer of this emissions control device. Please contact Walker directly for.. (more)

Select year, make, model above to verify this part fits your vehicle

Vehicle Install Locations: Left

GMC Sierra 2500 Catalytic Converter, OEM: 52311Walker
2001-2002 GMC Sierra 2500 Walker Catalytic Converter 52311
395.45, Save 39%   NEW ITEM
OEM: 52311, Item: 537361
  Only 1 left In Stock, Usually ships within 1 business day
Select year, make, model above to verify this part fits your vehicle

Vehicle Install Locations: Right

GMC Sierra 2500 Catalytic Converter, OEM: 50366Eastern Catalytic
1999-2000 GMC Sierra 2500 Eastern Catalytic Catalytic Converter 50366
395.45, Save 39%   NEW ITEM
OEM: 50366, Item: 1005304
  In Stock, Usually ships within 1 business day
Select year, make, model above to verify this part fits your vehicle

GMC Sierra 2500 Catalytic Converter, OEM: 49668
2001-2002 GMC Sierra 2500 Magnaflow Catalytic Converter 49668
Add for Price, Save 21%   NEW ITEM
OEM: 49668, Item: 1256237
  Only 3 left In Stock, Usually ships within 1-2 business days

If C.A.R.B. number is not provided, item is not California legal

Select year, make, model above to verify this part fits your vehicle

Vehicle Install Locations: Right

GMC Sierra 2500 Catalytic Converter, OEM: 079-5241/0795241Bosal
1999-2000 GMC Sierra 2500 Bosal Catalytic Converter 079-5241
398.55, Save 39%   NEW ITEM
OEM: 079-5241, Item: 1244340
  In Stock, Usually ships within 1 business day
Select year, make, model above to verify this part fits your vehicle

GMC Sierra 2500 Catalytic Converter, OEM: 51097
1999-2000 GMC Sierra 2500 Magnaflow Catalytic Converter 51097
Add for Price, Save 20%   NEW ITEM
OEM: 51097, Item: 1257050
  Only 1 left In Stock, Usually ships within 1-2 business days

If C.A.R.B. number is not provided, item is not California legal

Select year, make, model above to verify this part fits your vehicle

GMC Sierra 2500 Catalytic Converter, OEM: GM20370DEC
1999-2000 GMC Sierra 2500 DEC Catalytic Converter GM20370
Add for Price, Save 31%   NEW ITEM
OEM: GM20370, Item: 467845
  In Stock, Usually ships within 1 business day

Installation of this aftermarket catalytic converter is prohibited by law in California by C.A.R.B., and may also not comply with emissions regulations in other municipalities in other parts of the US and Canada. Before purchasing a new catalytic converter, consult your local regulatory agency, emissions testing facility, or mechanic for approval. Federal laws require all warranty claims be processed by the manufacturer of this emissions control device. Please contact DEC directly for.. (more)

Select year, make, model above to verify this part fits your vehicle

GMC Sierra 2500 Catalytic Converter, OEM: 81745Walker
1999-2000 GMC Sierra 2500 Walker Catalytic Converter 81745
464.35, Save 39%   NEW ITEM
OEM: 81745, Item: 1147961
  Only 2 left In Stock, Usually ships within 1 business day
Select year, make, model above to verify this part fits your vehicle

Vehicle Install Locations: Left

GMC Sierra 2500 Catalytic Converter, OEM: 447275
2003 GMC Sierra 2500 Magnaflow Catalytic Converter 447275
Add for Price, Save 20%   NEW ITEM
OEM: 447275, Item: 1256785
  Only 1 left In Stock, Usually ships within 1-2 business days

If C.A.R.B. number is not provided, item is not California legal

Select year, make, model above to verify this part fits your vehicle

GMC Sierra 2500 Catalytic Converter, OEM: 447283
2001 GMC Sierra 2500 Magnaflow Catalytic Converter 447283
Add for Price, Save 20%   NEW ITEM
OEM: 447283, Item: 1257763
  Only 5 left In Stock, Usually ships within 1-2 business days

If C.A.R.B. number is not provided, item is not California legal

Select year, make, model above to verify this part fits your vehicle

Vehicle Install Locations: Right

GMC Sierra 2500 Catalytic Converter, OEM: 447270
2001 GMC Sierra 2500 Magnaflow Catalytic Converter 447270
Add for Price, Save 23%   NEW ITEM
OEM: 447270, Item: 1450426
  Only 1 left In Stock, Usually ships within 1 business day
Select year, make, model above to verify this part fits your vehicle

Vehicle Install Locations: Left

GMC Sierra 2500 Catalytic Converter, OEM: 640565Eastern Catalytic
2000 GMC Sierra 2500 Eastern Catalytic Catalytic Converter 640565
532.35, Save 39%   NEW ITEM
OEM: 640565, Item: 1435140
  Only 3 left In Stock, Usually ships within 1 business day
Select year, make, model above to verify this part fits your vehicle

Vehicle Install Locations: Center

GMC Sierra 2500 CalCat Direct Fit Converter, OEM: 81761Walker
1999-2000 GMC Sierra 2500 Walker CalCat Direct Fit Converter 81761
593.15, Save 39%   NEW ITEM
OEM: 81761, Item: 660706
  Only 2 left In Stock, Usually ships within 1-2 business days
Select year, make, model above to verify this part fits your vehicle

GMC Sierra 2500 Catalytic Converter, OEM: 445419
2000 GMC Sierra 2500 Magnaflow Catalytic Converter 445419
Add for Price, Save 20%   NEW ITEM
OEM: 445419, Item: 1256955
  In Stock, Usually ships within 1-2 business days

If C.A.R.B. number is not provided, item is not California legal

Select year, make, model above to verify this part fits your vehicle

GMC Sierra 2500 Catalytic Converter, OEM: GM920370DEC
2000 GMC Sierra 2500 DEC Catalytic Converter GM920370
Add for Price, Save 31%   NEW ITEM
OEM: GM920370, Item: 467906
  In Stock, Usually ships within 1 business day

This catalytic converter is compliant with C.A.R.B. rules, restrictions, and specifications. It can be installed on a vehicle in California as well as other municipalities that use this emissions standard. Before purchasing a new catalytic converter, consult your local regulatory agency, emissions testing facility, or mechanic for approval. Federal laws require all warranty claims be processed by the manufacturer of this emissions control device. Please contact DEC directly for replacement.. (more)

Select year, make, model above to verify this part fits your vehicle

GMC Sierra 2500 Catalytic Converter, OEM: GM920370MDEC
2000 GMC Sierra 2500 DEC Catalytic Converter GM920370M
Add for Price, Save 31%   NEW ITEM
OEM: GM920370M, Item: 467907
  In Stock, Usually ships within 1 business day

This catalytic converter is compliant with C.A.R.B. rules, restrictions, and specifications. It can be installed on a vehicle in California as well as other municipalities that use this emissions standard. Before purchasing a new catalytic converter, consult your local regulatory agency, emissions testing facility, or mechanic for approval. Federal laws require all warranty claims be processed by the manufacturer of this emissions control device. Please contact DEC directly for replacement.. (more)

Select year, make, model above to verify this part fits your vehicle

GMC Sierra 2500 Catalytic Converter, OEM: 49667
2001-2002 GMC Sierra 2500 Magnaflow Catalytic Converter 49667
Add for Price, Save 19%   NO STOCK
OEM: 49667, Item: 1418853
  Restock date not known
Select year, make, model above to verify this part fits your vehicle

Vehicle Install Locations: Left