2003 GMC SIERRA 1500 Exhaust

Dorman Exhaust Manifolds 674-524

Exhaust Manifold, OEM Replacement, Cast Iron, Chevrolet, GMC, Each

Part Number: RNB-674-524

Not Yet Reviewed

Estimated Ship Date: May 19, 2026 if ordered today

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Estimated Ship Date: May 19, 2026 if ordered today

Walker Exhaust Intermediate Pipes 52216

Exhaust Pipe, Intermediate Pipe, Steel, Aluminized, 2.75 in. O.D., Chevy, GMC, Each

Part Number: WLK-52216

Not Yet Reviewed

Estimated Ship Date: May 28, 2026 if ordered today

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Estimated Ship Date: May 28, 2026 if ordered today

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AP Exhaust Intermediate Pipes 38728

5 out of 5 stars ( 1 )

Estimated Ship Date: May 18, 2026

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AP Exhaust Max Fit Tailpipes 127671

AP Exhaust Max Fit Tailpipes 127671

Tail Pipe, Max Fit, 2.500 in., Steel, Aluminized, Chevy, GMC, Passenger Side, Each

Part Number: APH-127671

Not Yet Reviewed

Estimated Ship Date: May 18, 2026 if ordered today

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Estimated Ship Date: May 18, 2026 if ordered today

AP Exhaust Max Fit Tailpipes 127669

Tailpipes, Exhaust, Max Fit, Steel, Aluminized, 2.250 in. O.D., 6.42 ft. Length, Passenger Side, Chevrolet, GMC, Each

Part Number: APH-127669

Not Yet Reviewed

Estimated Ship Date: May 18, 2026 if ordered today

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Estimated Ship Date: May 18, 2026 if ordered today

ATP Exhaust Manifolds 101371

Exhaust Manifolds, Cast Iron, Natural, Right, Cadillac, Chevrolet, GMC, Hummer, Each

Part Number: ATP-101371

4.0 out of 5 stars ( 1 )

Estimated Ship Date: May 12, 2026 if ordered today

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Estimated Ship Date: May 12, 2026 if ordered today

Walker Quiet-Flow 3 Steel 2.75 Inch Muffler 21356

Muffler, Quiet-Flow 3, 2 3/4 in. Inlet/2 3/4 in. Outlet, Steel, Aluminized, Chevy, GMC, Pickup, Each

Part Number: WLK-21356

1.0 out of 5 stars ( 1 )

Estimated Ship Date: Today

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Estimated Ship Date: Today

BRExhaust Direct-Fit Intermediate Pipes 102-1484

Exhaust Pipes, Direct-Fit Intermediate Pipes, Steel, Aluminized, 2.750 in. O.D., Chevrolet, GMC, Each

Part Number: BRE-102-1484

Not Yet Reviewed

Estimated Ship Date: May 22, 2026 if ordered today

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Estimated Ship Date: May 22, 2026 if ordered today

Dorman Exhaust Manifolds 674-523

Exhaust Manifold, OEM Replacement, Cast Iron, Chevrolet, GMC, Each

Part Number: RNB-674-523

Not Yet Reviewed

Estimated Ship Date: Today

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Estimated Ship Date: Today

ACDelco Exhaust Manifolds 12574320

Exhaust Manifolds, Replacement, Right, Cast Iron, Chevrolet, GMC, 4.3L, Each

Part Number: ADO-12574320

Not Yet Reviewed

Estimated Ship Date: Today

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Estimated Ship Date: Today

AP Exhaust Direct-Fit Catalytic Converters 645844

Catalytic Converters, Direct-Fit, Stock Flange Inlet, 2.50 in. Slip Fit Outlet, 51.25 in. Overall Length, Left, Cadillac, Chevrolet, GMC, Each

Part Number: APH-645844

Not Yet Reviewed

Estimated Ship Date: May 15, 2026 if ordered today

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Estimated Ship Date: May 15, 2026 if ordered today

AP Exhaust Max Fit Tailpipes 127668

Tail Pipe, Max Fit, 2.250 in., Steel, Aluminized, Chevy, GMC, Driver Side, Each

Part Number: APH-127668

Not Yet Reviewed

Estimated Ship Date: May 18, 2026 if ordered today

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Estimated Ship Date: May 18, 2026 if ordered today

BRExhaust Direct-Fit Exhaust Systems 106-0714

Exhaust Systems, Direct-Fit, Cat-back, Single, Steel, Aluminized, Side Exit, Chevrolet, GMC, Kit

Part Number: BRE-106-0714

Not Yet Reviewed

Estimated Ship Date: May 21, 2026 if ordered today

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Estimated Ship Date: May 21, 2026 if ordered today

Walker CalCat Direct-Fit Catalytic Converters 83497

Catalytic Converter, Cal-Cat Direct Fit, Stock Flange Inlet, Slip Fit Outlet, Ceramic Honeycomb, Cadillac, Chevrolet, GMC, Each

Part Number: WLK-83497

Not Yet Reviewed

Estimated Ship Date: May 27, 2026 if ordered today

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Estimated Ship Date: May 27, 2026 if ordered today

Walker CalCat Direct-Fit Catalytic Converters 83457

Catalytic Converter, Cal-Cat Direct Fit, Stock Flange Inlet, Stock Flange Outlet, Ceramic Honeycomb, Heat Shield, Cadillac, Chevrolet, GMC, Each

Part Number: WLK-83457

Not Yet Reviewed

Estimated Ship Date: May 27, 2026 if ordered today

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Estimated Ship Date: May 27, 2026 if ordered today

Stainless Works Performance Headers CT0305

2003-06 Chevy/GMC 4.8L, 5.3L Truck (4WD Only) - 1 3/4" CNC Mandrel Bent primaries, 3/8" thick CNC Laser cut fl

Part Number: STW-CT0305

Not Yet Reviewed

Estimated Ship Date: Jul 1, 2026 if ordered today

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Estimated Ship Date: Jul 1, 2026 if ordered today

AP Exhaust Universal Catalytic Converters 608736

Catalytic Converters, Universal, 2.50 in. Slip Fit Inlet/Outlet, Stainless Steel Case, Ceramic Honeycomb Substrate, 16.00 in. Overall Length, Each

Part Number: APH-608736

Not Yet Reviewed

Estimated Ship Date: May 18, 2026 if ordered today

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Estimated Ship Date: May 18, 2026 if ordered today

Dynomax Tailpipes 55514

Tailpipe, Exhaust, Outside Diameter 2.500 in., Stainless Steel, Natural, Chevrolet, GMC, Each

Part Number: WLK-55514

Not Yet Reviewed

Estimated Ship Date: May 27, 2026 if ordered today

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Estimated Ship Date: May 27, 2026 if ordered today

Catco Federal/EPA Direct-Fit Catalytic Converters 9266

Converter - Direct Fit

Part Number: CTO-9266

Not Yet Reviewed

Estimated Ship Date: May 18, 2026 if ordered today

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Estimated Ship Date: May 18, 2026 if ordered today

Walker Ultra Direct-Fit Catalytic Converters 16166

Catalytic Converter, Direct-Fit, Stainless Steel, Each

Part Number: WLK-16166

Not Yet Reviewed

Estimated Ship Date: May 28, 2026 if ordered today

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Estimated Ship Date: May 28, 2026 if ordered today

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AP Exhaust Direct-Fit Catalytic Converters 645844

Not Yet Reviewed

Estimated Ship Date: May 15, 2026

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Catco Federal/EPA Direct-Fit Catalytic Converters 9267

Converter - Direct Fit

Part Number: CTO-9267

Not Yet Reviewed

Estimated Ship Date: May 15, 2026 if ordered today

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Estimated Ship Date: May 15, 2026 if ordered today

AP Exhaust OE Replacement Steel 2.75 Inch Muffler 2306

Muffler, OE Replacement, Steel, Aluminized, Cadillac, Chevy, GMC, Each

Part Number: APH-2306

4.5 out of 5 stars ( 2 )

Estimated Ship Date: May 18, 2026 if ordered today

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Estimated Ship Date: May 18, 2026 if ordered today

AP Exhaust Direct-Fit Catalytic Converters 645448

Catalytic Converters, Direct-Fit, Stock Flange Inlet/Outlet, 40.50 in. Overall Length, Right, Cadillac, Chevrolet, GMC, Each

Part Number: APH-645448

Not Yet Reviewed

Estimated Ship Date: May 18, 2026 if ordered today

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Estimated Ship Date: May 18, 2026 if ordered today

ATP Exhaust Manifolds 101552

Exhaust Manifolds, Cast Iron, Natural, Left, Chevrolet, GMC, Each

Part Number: ATP-101552

Not Yet Reviewed

Estimated Ship Date: May 12, 2026 if ordered today

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Estimated Ship Date: May 12, 2026 if ordered today

Walker CalCat Universal Catalytic Converters 81923

Catalytic Converters, Universal, Stainless Steel Case, 2.500 in. Slip Fit Inlet/Outlet, 10.000 in. Overall Length, Each

Part Number: WLK-81923

5.0 out of 5 stars ( 1 )

Estimated Ship Date: May 28, 2026 if ordered today

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Estimated Ship Date: May 28, 2026 if ordered today

Need It Sooner? We recommend these similar substitute parts:

Walker CalCat Universal Catalytic Converters 83403

5 out of 5 stars ( 1 )

Estimated Ship Date: Today

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Stainless Works Performance Headers CT03052WD

2003-06 Chevy/GMC 4.8L, 5.3L Truck (2WD Only) - 1 3/4" CNC Mandrel Bent primaries, 3/8" thick CNC Laser cut fl

Part Number: STW-CT03052WD

Not Yet Reviewed

Estimated Ship Date: Jun 29, 2026 if ordered today

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Estimated Ship Date: Jun 29, 2026 if ordered today