27+ 2003 GMC Sierra 2500 HD Cat-Back Exhaust Parts

Cat-Back Exhaust (27 products)

Gibson

Part # 65204

Choose Trim

Gibson 02-05 Chevrolet Silverado 2500 HD Base 6.0L 2.5in Cat-Back Dual Sport Exhaust - Stainless

$869.52

Magnaflow

Part # 15829

Fits All Trims

MagnaFlow Sys C/B 03- GM 2500HD 6.0 Dual CCSB

$1135.17

Magnaflow

Part # 15789

Fits All Trims

MagnaFlow Sys C/B 03 GM Silverado 2500Hd 6.0L

$1045.41

Diamond Eye KIT 4in Catback Single AL CHEVY/GMC 6.6L 2500/3500 01-05

Diamond Eye Performance

Part # K4110A

Fits All Trims

Diamond Eye KIT 4in Catback Single AL CHEVY/GMC 6.6L 2500/3500 01-05

$497.97

Diamond Eye KIT 4in Catback Single MFLR RPLCMENT PIPE SS 01-05 CHEVY/GMC 6.6L 2500/3500

Diamond Eye Performance

Part # K4110S-RP

Fits All Trims

Diamond Eye KIT 4in Catback Single MFLR RPLCMENT PIPE SS 01-05 CHEVY/GMC 6.6L 2500/3500

$568.88

Diamond Eye KIT 4in Catback Single SS CHEVY/GMC 6.6L 2500/3500 01-05

Diamond Eye Performance

Part # K4110S

Fits All Trims

Diamond Eye KIT 4in Catback Single SS CHEVY/GMC 6.6L 2500/3500 01-05

$653.48

Diamond Eye KIT 4in Catback MFLR RPLCMENT PIPE Single AL: 01-05 CHEVY/GMC 6.6L 2500/3500

Diamond Eye Performance

Part # K4110A-RP

Fits All Trims

Diamond Eye KIT 4in Catback MFLR RPLCMENT PIPE Single AL: 01-05 CHEVY/GMC 6.6L 2500/3500

$422.40

aFe MACHForce XP Exhausts Cat-Back SS-409 EXH CB GM Diesel Trucks 01-05 V8-6.6L (td) LB7/LLY

aFe

Part # 49-44001

Fits All Trims

aFe MACHForce XP Exhausts Cat-Back SS-409 EXH CB GM Diesel Trucks 01-05 V8-6.6L (td) LB7/LLY

$808.00

Gibson

Part # 5558

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Gibson 02-05 Chevrolet Silverado 2500 HD Base 6.0L 2.5in Cat-Back Dual Split Exhaust - Aluminized

$722.61

Gibson

Part # 5009

Choose Trim

Gibson 02-05 Chevrolet Silverado 2500 HD Base 6.0L 2.5in Cat-Back Dual Extreme Exhaust - Aluminized

$722.61

aFe LARGE Bore HD Exhausts Cat-Back SS-409 EXH CB GM Diesel Trucks 01-05 V8-6.6L (td) LB7/LLY

aFe

Part # 49-14001

Fits All Trims

aFe LARGE Bore HD Exhausts Cat-Back SS-409 EXH CB GM Diesel Trucks 01-05 V8-6.6L (td) LB7/LLY

$660.00

Gibson

Part # 65017

Choose Trim

Gibson 01-05 Chevrolet Silverado 2500 HD Base 6.0L 2.5in Cat-Back Dual Extreme Exhaust - Stainless

$869.52

Gibson

Part # 65009

Choose Trim

Gibson 02-05 Chevrolet Silverado 2500 HD Base 6.0L 2.5in Cat-Back Dual Extreme Exhaust - Stainless

$869.52

Gibson

Part # 615567

Choose Trim

Gibson 01-06 Chevrolet Silverado 2500 HD LS 6.0L 4in Cat-Back Single Exhaust - Stainless

$809.01

Gibson

Part # 65558

Choose Trim

Gibson 02-05 Chevrolet Silverado 2500 HD Base 6.0L 2.5in Cat-Back Dual Split Exhaust - Stainless

$869.52

Gibson

Part # 315547

Choose Trim

Gibson 01-05 Chevrolet Silverado 2500 HD Base 6.0L 4in Cat-Back Single Exhaust - Aluminized

$630.85

JBA 01-06 Chevrolet Silverado 2500/3500 HD 6.0/8.1L 409SS Pass Side Dual Exit Cat-Back Exhaust

JBA

Part # 40-3030

Fits All Trims

JBA 01-06 Chevrolet Silverado 2500/3500 HD 6.0/8.1L 409SS Pass Side Dual Exit Cat-Back Exhaust

$859.26

Gibson

Part # 65550

Choose Trim

Gibson 01-05 Chevrolet Silverado 2500 HD Base 6.0L 2.5in Cat-Back Dual Split Exhaust - Stainless

$869.52

Corsa 2003-2006 Chevrolet Silverado Ext. Cab/Short Bed 2500 6.0L V8 Polished Sport Cat-Back Exhaust

CORSA Performance

Part # 24292

Choose Trim

Corsa 2003-2006 Chevrolet Silverado Ext. Cab/Short Bed 2500 6.0L V8 Polished Sport Cat-Back Exhaust

$1041.41

Corsa 2003-2006 Chevrolet Silverado Crew Cab/Short Bed 2500 6.0L V8 Polished Sport Cat-Back Exhaust

CORSA Performance

Part # 24296

Choose Trim

Corsa 2003-2006 Chevrolet Silverado Crew Cab/Short Bed 2500 6.0L V8 Polished Sport Cat-Back Exhaust

$1041.41

Frequently Asked Questions

Do these parts fit my 2003 GMC Sierra 2500 HD?

This page groups parts listed for the 2003 GMC Sierra 2500 HD. Some products fit every trim, while others depend on submodel, engine, drivetrain, or brake package. Use your trim in My Garage or the product page fitment check to confirm exact fit.

What cat-back exhaust options are available for my 2003 GMC Sierra 2500 HD?

We offer a wide selection of cat-back exhaust parts for the 2003 GMC Sierra 2500 HD. This page narrows the catalog to the year, make, and model; use your trim on product pages to confirm exact fit when a part only fits certain submodels.

What brands make parts for the 2003 GMC Sierra 2500 HD?

We carry parts from trusted brands including Gibson, Diamond Eye Performance, Magnaflow, aFe, and CORSA Performance, plus many more. Filter by brand to find your preferred manufacturer.

How fast do 2003 GMC Sierra 2500 HD parts ship?

Most in-stock items ship within 1-2 business days. Shipping rates are calculated at checkout based on your location.

What warranty do your 2003 GMC Sierra 2500 HD parts come with?

Warranty coverage varies by manufacturer but typically ranges from 1 year to lifetime. Each product page includes specific warranty information from the manufacturer.

2003 GMC Sierra 2500 HD(5,164 parts)

2003 GMC Sierra 2500 HD(5,164 parts)

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Other GMC Sierra 2500 HD Years

Cat-Back Exhaust (27 products)

Gibson 02-05 Chevrolet Silverado 2500 HD Base 6.0L 2.5in Cat-Back Dual Sport Exhaust - Stainless

MagnaFlow Sys C/B 03- GM 2500HD 6.0 Dual CCSB

MagnaFlow Sys C/B 03 GM Silverado 2500Hd 6.0L

Diamond Eye KIT 4in Catback Single AL CHEVY/GMC 6.6L 2500/3500 01-05

Diamond Eye KIT 4in Catback Single MFLR RPLCMENT PIPE SS 01-05 CHEVY/GMC 6.6L 2500/3500

Diamond Eye KIT 4in Catback Single SS CHEVY/GMC 6.6L 2500/3500 01-05

Diamond Eye KIT 4in Catback MFLR RPLCMENT PIPE Single AL: 01-05 CHEVY/GMC 6.6L 2500/3500

aFe MACHForce XP Exhausts Cat-Back SS-409 EXH CB GM Diesel Trucks 01-05 V8-6.6L (td) LB7/LLY

Gibson 02-05 Chevrolet Silverado 2500 HD Base 6.0L 2.5in Cat-Back Dual Split Exhaust - Aluminized

Gibson 02-05 Chevrolet Silverado 2500 HD Base 6.0L 2.5in Cat-Back Dual Extreme Exhaust - Aluminized

aFe LARGE Bore HD Exhausts Cat-Back SS-409 EXH CB GM Diesel Trucks 01-05 V8-6.6L (td) LB7/LLY

Gibson 01-05 Chevrolet Silverado 2500 HD Base 6.0L 2.5in Cat-Back Dual Extreme Exhaust - Stainless

Gibson 02-05 Chevrolet Silverado 2500 HD Base 6.0L 2.5in Cat-Back Dual Extreme Exhaust - Stainless

Gibson 01-06 Chevrolet Silverado 2500 HD LS 6.0L 4in Cat-Back Single Exhaust - Stainless

Gibson 02-05 Chevrolet Silverado 2500 HD Base 6.0L 2.5in Cat-Back Dual Split Exhaust - Stainless

Gibson 01-05 Chevrolet Silverado 2500 HD Base 6.0L 4in Cat-Back Single Exhaust - Aluminized

JBA 01-06 Chevrolet Silverado 2500/3500 HD 6.0/8.1L 409SS Pass Side Dual Exit Cat-Back Exhaust

Gibson 01-05 Chevrolet Silverado 2500 HD Base 6.0L 2.5in Cat-Back Dual Split Exhaust - Stainless

Corsa 2003-2006 Chevrolet Silverado Ext. Cab/Short Bed 2500 6.0L V8 Polished Sport Cat-Back Exhaust

Corsa 2003-2006 Chevrolet Silverado Crew Cab/Short Bed 2500 6.0L V8 Polished Sport Cat-Back Exhaust

Frequently Asked Questions

Do these parts fit my 2003 GMC Sierra 2500 HD?

What cat-back exhaust options are available for my 2003 GMC Sierra 2500 HD?

What brands make parts for the 2003 GMC Sierra 2500 HD?

How fast do 2003 GMC Sierra 2500 HD parts ship?

What warranty do your 2003 GMC Sierra 2500 HD parts come with?