order by phone (Se Habla Español) 1-800-913-6119 | 1-801-214-2997 or Live Chat
APWPART FINDER
My Vehicle Add New
  • Select Year
  • Select Make
  • Select Model
  • Select Submodel
  • Select Engine

Muffler for 2003 GMC Sierra 2500

We have 35 Items In-stock. Select your vehicle's Submodel to continue.

Walker Quiet-Flow3 Muffler

Walker's Quiet-flow3 muffler features a sophisticated internal routing and tuning technologies for superior flow and premium OE-style sound. Its internal partition baffles and spun-locked heads help improve structural support.

Features
  • OE-style sound
  • Aluminized steel muffler material
Walker Muffler, Walker Quiet-Flow3, Aluminized Steel, Natural
$106.73 List Price $210.62 Save $103.89 Availability: In Stock
  • Free Ground Shipping
  • Low Price Guarantee
(

more

)
  • SKU#: WK21533
  • Product Fit: Direct Fit
  • Quantity Sold: Sold Individually
  • Sound Level: Stock
  • Anticipated Ship Out Time: Same day - 1 business day
Fits the following 2003 GMC Sierra 2500 submodels:
  • 8 Cyl 6.0L | Base, SLE, SLT, WT

Walker Quiet-Flow SS Muffler

Walker's Quiet-flow SS muffler features a sophisticated internal routing and tuning technologies for superior flow and premium OE-style sound. Its internal partition baffles and spun-locked heads help improve structural support.

Features
  • Stainless steel muffler material
  • OE-style sound
Walker Muffler, Stainless Steel, Natural, Direct Fit
$190.14 List Price $224.37 Save $34.23 Availability: In Stock
  • Free Ground Shipping
  • Low Price Guarantee
(

more

)
  • SKU#: WK21576
  • Quantity Sold: Sold Individually
  • Sound Level: Stock
  • Anticipated Ship Out Time: Same day - 1 business day
  • Case Shape: Oval
  • Inlet Quantity: Dual
  • Inlet Size: 3 in.
  • Outlet Location: Offset
  • Outlet Quantity: Single
  • Outlet Size: 3 in.
  • Warranty: Lifetime Walker limited warranty
see more Fits the following 2003 GMC Sierra 2500 submodels:
  • 8 Cyl 6.0L | SLE, SLT, Base, WT

Kool Vue Stainless steel Muffler

Kool Vue Stainless Steel Muffler is an affordable replacement for your old and rusty original unit. It is made from stainless steel material for extended durability.

  • Affordable replacement for old and rusty original unit
  • Stainless steel material for extended durability and longer life
  • Comes with 2-year Kool Vue limited warranty

You can't go wrong with Kool Vue parts! From restoration to performance products, Kool Vue has got you covered! Kool Vue is a tried and tested brand trusted by thousands of DIY people and body shops alike; it provides only the best quality products for its customers, and best of all it comes with a 2-year Kool Vue limited warranty!

Kool Vue Muffler, Stainless Steel, Polished, Universal
$88.21 List Price $104.09 Save $15.88 Availability: In Stock
  • APW Bestseller
  • Free Ground Shipping
  • Low Price Guarantee
Earn Double
AutoPoints
Intead of 88,
  • SKU#: KV150105
  • Quantity Sold: Sold Individually
  • Sound Level: Mild
  • Recommended Use: Performance
  • Anticipated Ship Out Time: 1-2 Business Days
  • Attachment Style: Weld-on
  • Body Length: 14 in.
  • Case Shape: Oval
  • Height: 5 in.
  • Inlet Location: Center
  • Inlet Quantity: Single
  • Inlet Size: 2.5 in.
  • Notes: May require minor modifications during installation
  • Outlet Location: Center
  • Outlet Quantity: Dual
  • Outlet Size: 3.5 in.
  • Overall Length: 24 in.
  • Tip Finish: Polished
  • Tip Material: Steel
  • Warranty: 2-year Kool Vue limited warranty
  • Width: 9 in.
see more Fits the following 2003 GMC Sierra 2500 submodels:
  • 8 Cyl 6.0L | SLE, SLT, Base, WT
Rating: (see review/s)

"This comp. was there when I lost My order and I had only my ebay receit. Thay founded my order and sent out right any Thanks" posted by: zzsplash on March 11, 2014 view all 5 reviews

Kool Vue Muffler, Stainless Steel, Polished, Direct Fit
$94.52 List Price $111.53 Save $17.01 Availability: In Stock
  • APW Bestseller
  • Free Ground Shipping
  • Low Price Guarantee
Earn Double
AutoPoints
Intead of 95,
  • SKU#: KV150110
  • Quantity Sold: Sold Individually
  • Sound Level: Mild
  • Recommended Use: Performance
  • Anticipated Ship Out Time: 1-2 Business Days
  • Attachment Style: Clamp-on
  • Case Shape: Round
  • Height: 5 in.
  • Inlet Location: Center
  • Inlet Quantity: Single
  • Inlet Size: 2.25 in.
  • Outlet Location: Center
  • Outlet Quantity: Single
  • Outlet Size: 4 in.
  • Overall Length: 20 in.
  • Tip Finish: Polished
  • Tip Material: Steel
  • Warranty: 2-year Kool Vue limited warranty
  • Width: 5 in.
see more Fits the following 2003 GMC Sierra 2500 submodels:
  • 8 Cyl 6.0L | SLE, SLT, Base, WT
Rating: (see review/s)

"Very high quality muffler,all stainless steel construction,one third the price that other companies charge for the same product.This was a very easy installation to do.The best part was it is a muffler and tail pipe in one." posted by: jp morgan on September 19, 2011 view all 2 reviews

Kool Vue Muffler, Stainless Steel, Polished, Direct Fit
$53.78 List Price $63.46 Save $9.68 Availability: In Stock
  • APW Bestseller
  • Free Ground Shipping
  • Low Price Guarantee
Earn Double
AutoPoints
Intead of 54,
  • SKU#: KV150103
  • Quantity Sold: Sold Individually
  • Sound Level: Mild
  • Recommended Use: Performance
  • Anticipated Ship Out Time: 1-2 Business Days
  • Attachment Style: Clamp-on
  • Body Length: 13.75 in.
  • Case Shape: Round
  • Height: 6 in.
  • Inlet Location: Center
  • Inlet Quantity: Single
  • Inlet Size: 2.25 in.
  • Outlet Location: Center
  • Outlet Quantity: Single
  • Outlet Size: 4 in.
  • Overall Length: 17.5 in.
  • Tip Diameter: 4 in.
  • Tip Finish: Polished
  • Tip Material: Steel
  • Warranty: 2-year Kool Vue limited warranty
  • Width: 6 in.
see more Fits the following 2003 GMC Sierra 2500 submodels:
  • 8 Cyl 6.0L | SLE, SLT, Base, WT
Rating: (see review/s)

"love it sounds great!!!!i buy from here all the time!!!!good price!!!!" posted by: on January 26, 2014 view all 4 reviews

Flowmaster - 50 Series Big Block Mufflers

FLOWMASTER – 50 SERIES BIG BLOCK MUFFLERS

Flowmaster’s Big Block mufflers turn your big rig – truck, SUV or motorhome – into something a little more pleasant to drive, giving it a nice, quiet tone and significant boost in horsepower, torque and fuel economy. Flowmaster, known as ‘the exhaust technology company,’ is a leading manufacturer of high performance exhaust systems and respected for design, innovation and engineering.

  • Increases gas mileage, torque and horsepower
  • Backed by a lifetime warranty
  • Fully MIG-welded for maximum strength
  • Comes in stainless steel
  • Quick and easy installation
  • For large SUVs, big trucks, tow vehicles and motorhomes
  • Super quiet inside the cabin
  • Minimizes heat from the engine and vehicle wear-and-tear overall
  • Big resonance chamber keeps interior noise to a minimum
  • Dyno-tested
Flowmaster Muffler, Flowmaster 50 Series Big Block, Aluminized Steel, Gray
$182.99 List Price $236.81 Save $53.82 Availability: In Stock
  • Free Ground Shipping
  • Low Price Guarantee
(

more

)
  • SKU#: F13530513
  • Product Fit: Minor Modifications
  • Quantity Sold: Sold Individually
  • Sound Level: Mild
  • Recommended Use: Performance
  • Anticipated Ship Out Time: 1-2 Business Days
  • Attachment Style: Clamp-On or Weld-On (Recommended)
  • Body Length: 22 in.
  • Case Shape: Oval
  • Height: 5 in.
  • Inlet Location: Center (Dual)
  • Inlet Quantity: Dual
  • Inlet Size: 3 in.
  • Internal Construction: Chambered
  • Outlet Location: Offset
  • Outlet Quantity: Single
  • Outlet Size: 3.5 in.
  • Overall Length: 28 in.
  • Warranty: 3-year Flowmaster limited warranty
  • Width: 12 in.
see more Fits the following 2003 GMC Sierra 2500 submodels:
  • 8 Cyl 6.0L | SLE, SLT, Base, WT
Rating: (see review/s)

"This was easy to install with a lift and welder. Great V8 sound without the vibrating or rattling, like other mufflers. Loud enough to let everybody know without waking the neighbors. Would recommend adding a coat of high temp paint to help with the rust." posted by: on April 7, 2011 view all 2 reviews

Thrush Turbo Direct fit Muffler

Thrush Turbo muffler features a unique and high flow design with reversible flow chambers for maximum flexibility. It is made of 100 percent aluminum for long life and has time-proven spun-locked heads for leak-free seal.

Features
  • Aluminized steel muffler material
  • Reversible for maximum flexibility
Thrush Muffler, Thrush Turbo, Aluminized Steel, Natural
$39.21 List Price $61.18 Save $21.97 Availability: In Stock
  • APW Bestseller
  • Low Price Guarantee
(

more

)
  • SKU#: D2217715
  • Product Fit: Direct Fit
  • Quantity Sold: Sold Individually
  • Sound Level: Stock
  • Anticipated Ship Out Time: 1-2 Business Days
  • Body Length: 14 in.
  • Case Shape: Oval
  • Inlet Size: 2.5 in.
  • Outlet Size: 2.5 in.
  • Overall Length: 18.5 in.
see more Fits the following 2003 GMC Sierra 2500 submodels:
  • 8 Cyl 6.0L | SLE, SLT, Base, WT
Rating: (see review/s)

"PRODUCT WAS JUST AS ORDERED. WAS INSTALLED WITH EASE." posted by: G LAB on March 21, 2013 view all 7 reviews

Thrush Muffler, Thrush Turbo, Aluminized Steel, Natural
$44.85 List Price $61.18 Save $16.33 Availability: In Stock
  • APW Bestseller
  • Low Price Guarantee
(

more

)
  • SKU#: D2217713
  • Product Fit: Direct Fit
  • Quantity Sold: Sold Individually
  • Sound Level: Stock
  • Anticipated Ship Out Time: 1-2 Business Days
  • Body Length: 14 in.
  • Case Shape: Oval
  • Height: 4.25 in.
  • Includes: Expandable bushings
  • Inlet Location: Offset
  • Inlet Quantity: Single
  • Inlet Size: 2.25 in.
  • Outlet Location: Center
  • Outlet Quantity: Single
  • Outlet Size: 2.25 in.
  • Overall Length: 18.5 in.
  • Warranty: Lifetime Thrush limited warranty
  • Width: 9.75 in.
see more Fits the following 2003 GMC Sierra 2500 submodels:
  • 8 Cyl 6.0L | SLE, SLT, Base, WT
Rating: (see review/s)

"Sounds good on my 2005 ford explorer. Nice rumble without it being obnoxious can still talk over the noise levels it produces. Plus it is half the size of original muffler that came with the car." posted by: on January 8, 2014 view all 3 reviews

Thrush Muffler, Thrush Turbo, Aluminized Steel, Natural
$40.76 List Price $61.18 Save $20.42 Availability: In Stock
  • APW Bestseller
  • Low Price Guarantee
(

more

)
  • SKU#: D2217711
  • Product Fit: Direct Fit
  • Quantity Sold: Sold Individually
  • Sound Level: Stock
  • Anticipated Ship Out Time: 1-2 Business Days
  • Body Length: 14 in.
  • Case Shape: Oval
  • Height: 4.25 in.
  • Includes: Expandable bushings
  • Inlet Location: Offset
  • Inlet Quantity: Single
  • Inlet Size: 2 in.
  • Outlet Location: Center
  • Outlet Quantity: Single
  • Outlet Size: 2 in.
  • Overall Length: 18.5 in.
  • Warranty: Lifetime Thrush limited warranty
  • Width: 9.75 in.
see more Fits the following 2003 GMC Sierra 2500 submodels:
  • 8 Cyl 6.0L | SLE, SLT, Base, WT
Rating: (see review/s)

"Muffler arrived on time and was right for my car muffler shop was surprised at the price." posted by: porgie on November 10, 2013 view all 4 reviews

More results for 2003 GMC Sierra 2500 Muffler

THRUSH GLASSPACK DIRECT FIT MUFFLER
Thrush Glasspack mufflers feature CRF technology for powerful tone and long life, smooth flowing perforated center tubes that minimize turbulence, and straight-through design for maximum flow and... (see more)
DYNOMAX ULTRA FLO WELDED DIRECT FIT MUFFLER
Dynomax Ultra Flo Welded Mufflers feature unique straight-through design for maximum flow and power, high chromium content, T-34 cover and heads, and continuous perforated tube design that maximizes... (see more)
DYNOMAX MUFFLER

Dynomax Muffler

The Dynomax Muffler is made out of high grade materials to ensure your product to have long service life. What's more, this remarkable part ensures to provide the best exhaust flow... (see more)