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Catalytic Converter for 2004 GMC Sierra 1500

We have 31 Items In-stock. Select your vehicle's Submodel to continue.

Evan Fischer 48-State Legal (No CA and NY) Catalytic Converter

This Evan Fischer 48-State Legal (No CA and NY) Direct Fit Catalytic Converter is manufactured from high quality and durable stainless steel catalytic case, 16-gauge aluminized steel tubes, and heat shield for long lasting durability and better protection for your vehicle. It also features honeycomb catalyst that has maximum surface area flow. OBD-II and EPA compliant catalytic converter; It is a high quality aftermarket replacement for the OEM catalytic converter. Designed for easy installation - it requires no cutting or welding!

Evan Fischer also offers comprehensive manifold converter assemblies for newer vehicle models!

  • OBD-II And EPA compliant catalytic converter
  • Requires NO cutting or welding
  • Honeycomb catalyst with maximum surface area flow
  • Covered by 5-year or 50,000-mile limited warranty
  • Not legal for sale in California and New York; Cannot be shipped to CA or NY addresses

Evan Fischer Front Catalytic Converter - Traditional Converter, Direct Fit

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$299.00 $352.82 You Save $53.82 (15%)
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Availability: In Stock
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  • Sku#: REPG960301
  • Location: Front
  • Type: Traditional Converter
  • Emissions: 48-State Legal (Cannot Ship to CA or NY)
  • Product Fit: Direct Fit
  • Quantity Sold: Assembly
  • Tube Material: Aluminized Steel
  • Dimensions: 43 in. overall length
  • Inlet Type: Single (3-bolt welded flange)
  • Outlet Type: Single (2-bolt spinner flange)
  • Anticipated Ship Out Time: 1-2 Business Days
  • Warranty: 5-year or 50,000-mile limited warranty
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Fits the following 2004 GMC Sierra 1500 Submodels

  • 6 Cyl 4.3L | SLE, SLT, Base, WT
  • 8 Cyl 4.8L | SLT, SLE, Base, WT
  • 8 Cyl 5.3L | SLE, SLT, Base, WT
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Customer Review: (see review/s)
  • This was real easy to install just needed a second hand to get it in place

    posted by: Night mechanic on April 5, 2015

  • Really Good part at great price. Cheaper than anyone else.

    posted by: Johnny Springs on March 2, 2015

  • view all 3 reviews

Eastern 49-state legal Universal Catalytic Converter

Eastern 49-State Legal Universal Catalytic Converters

  • NANO technology for better converter efficiency
  • Advanced materials design for optimum engine output and catalytic efficiency
  • Complete range of inlet and outlet diameters
  • Non-directional for ease of installation
Backed by 3 decades of product expertise, Eastern continues to invest in state-of-the-art production equipment to guarantee only the best for their customers - making them ready for the future.

Note:
  • 49-state legal; Not legal in California and other states adopting California Emissions Standards; Not for sale or use in California and other states adopting California Emissions Standards; Cannot be shipped to California and such states

Eastern ECO II Catalytic Converter - Traditional Converter, Semi-Universal

Best Seller
$64.70 $76.35 You Save $11.65 (15%)
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Availability: In Stock
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  • Sku#: EAST83166
  • Series: Eastern ECO II
  • Type: Traditional Converter
  • Emissions: 48-State Legal (Cannot Ship to CA or NY)
  • Product Fit: Semi-Universal
  • Quantity Sold: Sold Individually
  • Tube Material: Aluminized Steel
  • Dimensions: 10 in. L x 6 in. W x 4.25 in. H, 14 in. overall length
  • Replaces OE Number: 18450-16520
  • Anticipated Ship Out Time: 1-2 Business Days
  • Warranty: 5-year or 50,000-mile Eastern limited warranty
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Fits the following 2004 GMC Sierra 1500 Submodels

  • 6 Cyl 4.3L | SLE, SLT, Base, WT
  • 8 Cyl 4.8L | SLT, SLE, Base, WT
  • 8 Cyl 5.3L | SLE, SLT, Base, WT
See more
Customer Review: (see review/s)
  • INSTALLED IT AND RESET COMPUTER SO FAR THE SERVICE ENGINE LIGHT HAS NOT COME BACK ON

    posted by: TEX on April 8, 2015

  • Converters were deliver a day early around a holiday. Matched up great. Fixed the problem we were having.

    posted by: vachick73 on January 21, 2015

  • view all 10 reviews

49-state legal Eastern Direct Fit Catalytic Converter

Eastern 49-State Legal Direct Fit Catalytic Converters

  • NANO technology for better converter efficiency
  • Advanced materials design for optimum engine output and catalytic efficiency
  • Complete range of inlet and outlet diameters
Backed by 3 decades of product expertise, Eastern continues to invest in state-of-the-art production equipment to guarantee only the best for their customers - making them ready for the future.

Note:
  • 49-state legal; Not legal in California and other states adopting California Emissions Standards; Not for sale or use in California and other states adopting California Emissions Standards; Cannot be shipped to California and such states

Eastern ECO II Catalytic Converter - Traditional Converter, Direct Fit

Best Seller
$341.38 $402.83 You Save $61.45 (15%)
Add to Cart
Availability: In Stock
(more)
  • Sku#: EAST50366
  • Series: Eastern ECO II
  • Type: Traditional Converter
  • Emissions: 48-State Legal (Cannot Ship to CA or NY)
  • Product Fit: Direct Fit
  • Quantity Sold: Assembly
  • Tube Material: Aluminized Steel
  • Dimensions: 46 in. overall length
  • Anticipated Ship Out Time: 1-2 Business Days
  • Warranty: 5-year or 50,000-mile Eastern limited warranty
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Fits the following 2004 GMC Sierra 1500 Submodels

  • 6 Cyl 4.3L | SLE, SLT, Base, WT
  • 8 Cyl 4.8L | SLT, SLE, Base, WT
  • 8 Cyl 5.3L | SLE, SLT, Base, WT
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Customer Review: (see review/s)
  • This of course is a little work not bad thou I read some of the reviews where some stated you have to remove the transmission cross member. So what just remove a few bolts let one side drop down support the transmission with a jack. I soaked all my bolts with PB blaster a couple times during the week then when it came time to remove them no problem. The exhaust and catalytic converters came in two sections which was good and the clamp and gaskets were in the kit and O2 port holes had plugs in them which you will have to remove. However for $300. plus some change this saved me some money and so far no leaks and they work fine and my check engine light hasn t came back on so good deal.

    posted by: retired First Sergeant on February 27, 2015

  • the product that I ordered was delivered on time that was promised and all the items were included.the installation was not complicated due to the parts all lining up in place having the part come together where it did made the installation a breeze I was able to avoid removing any cross members etc.

    posted by: kreid on July 7, 2014

  • view all 47 reviews

Eastern 50-state legal Catalytic Converter

Eastern ECO CARB Catalytic Converter

 30 years of innovation is proof enough that Eastern is the best manufacturer of the finest aftermarket and original equipment catalytic converters on the market. Their ECO Series Catalytic Converters which are designed to help keep the Check Engine Light (MIL) off is another set of catalytic converters with world class quality.

 The Eastern ECO CARB Catalytic Converter is the best option for any vehicle that needs to comply with the California Air Resources Board (CARB) regulations. The Eastern ECO CARB Catalytic Converter features washcoats with greater loadings of precious metals to handle applications with ultra low emissions, higher than normal emissions, as well as vehicles with higher mileage and heavier workloads.

Here's why Eastern ECO CARB Catalytic Converter is the best option:

  •   Passed the emissions requirement of the California Air Resources Board
  •   Engineered with Eastern's proprietary NANO technology yielding highly efficient loadings for lower cost and better converter efficiency
  •   Features an advanced materials design for maximum engine output and performance
  •   Comes with a 5-year or 50,000-mile warranty

Eastern ECO CARB Center Catalytic Converter - Traditional Converter, Semi-Universal

Overstock
$211.65 $249.75 You Save $38.10 (15%)
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Availability: In Stock
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  • Sku#: EAST640012
  • Location: Center
  • Series: Eastern ECO CARB
  • Type: Traditional Converter
  • Emissions: 50-State Legal
  • Product Fit: Semi-Universal
  • Quantity Sold: Sold Individually
  • Tube Material: Aluminized Steel
  • E O Number: D-665-18
  • Anticipated Ship Out Time: 1-2 Business Days
  • Warranty: 5-year or 50,000-mile Eastern limited warranty
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Fits the following 2004 GMC Sierra 1500 Submodels

  • 6 Cyl 4.3L | SLE, SLT, Base, WT
See more

Magnaflow 49-State Legal Semi-Universal Catalytic Converter

  • Not legal for use in California or in states adopting the California emissions standards
  • Semi-universal design – cut out your old catalytic converter and weld in the new one
  • Stainless Steel Construction
  • Legendary Magnaflow quality, power, and sound
  • Ceramic, honeycomb catalyst designed for maximum flow and surface area

When you want the best, you want Magnaflow!  These 49-State Legal semi-universal catalytic converters have a catalyst specifically designed for your vehicle – just cut out your old catalytic converter and weld in the new one.  Engineered to cut emissions and improve performance.

Magnaflow 49-State Semi-Universal Driver Or Passenger Side Catalytic Converter - Traditional Converter, Semi-Universal

Best Seller
$111.97 $144.90 You Save $32.93 (23%)
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Availability: In Stock
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  • Sku#: M6699006HM
  • Location: Driver Or Passenger Side
  • Series: Magnaflow 49-State Semi-Universal
  • Type: Traditional Converter
  • Emissions: 48-State Legal (Cannot Ship to CA or NY)
  • Product Fit: Semi-Universal
  • Quantity Sold: Sold Individually
  • Tube Material: Stainless Steel
  • Dimensions: 12 in. L x 6.5 in. W, 16 in. overall length
  • Anticipated Ship Out Time: 1-2 Business Days
  • Warranty: Magnaflow 25,000 Mile Limited Warranty
  • Notes: Slip fit Inlet and outlet attachment type
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Fits the following 2004 GMC Sierra 1500 Submodels

  • 6 Cyl 4.3L | SLE, SLT, Base, WT
  • 8 Cyl 4.8L | SLT, SLE, Base, WT
  • 8 Cyl 5.3L | SLE, SLT, Base, WT
See more

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