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2003 GMC Sierra 1500
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Exhaust Manifolds, Pipes & Mufflers
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Walker® Quiet Flow Stainless Steel Oval Aluminized Exhaust Muffler for 2003 GMC Sierra 1500
PartNumber: 21356Product Specifications- Notes: Premium - Limited Lifetime Warranty; If welded Assy, replace all Reqd parts.;Premium - Limited Lifetime Warranty; If Welded Assy, Replace All Reqd Parts
- Body Height: 7.000
- Body Length: 24.000
- Body Material: Stainless Steel
- Body Width: 9.000
- Exhaust Component Mount Type: No Mounts
- Finish: Aluminized
- Grade Type: Regular
- Inlet 1 Inside Diameter: 2.750
- Inlet 1 Type: Pipe Connection
- Inlet Configuration: Offset
- Inlet Offset: 1.625
- Internet Product Code (IPC): 24930647BF5
- Item has MSDS (SDS): N
- Max Year Covered: 2007
- MFG Brand Name: Walker Exhaust
- MFG Model # (Series): 21356
- MFG Name: Tenneco, Inc
- Min Year Covered: 1999
- Most Popular Make / Model: Chevrolet Silverado 1500
- Most Popular Year: 2004
- Muffler Body Height: 7.0
- Muffler Body Length: 24.0
- Muffler Body Material: Stainless Steel
- Muffler Body Width: 9.0
- Muffler Color / Finish: Bare
- Muffler Inlet: Offset
- Muffler Inlet Connection Type: Pipe Connection
- Muffler Inlet Count: 1
- Muffler Inlet Diameter (in): 2.75
- Muffler Inlet Diameter 2 (in): 0.0
- Muffler Inlet Diameter Designation: Inside Diameter
- Muffler Outlet: Offset
- Muffler Outlet Connection Type: Pipe Connection
- Muffler Outlet Count: 1
- Muffler Outlet Diameter (in): 2.75
- Muffler Outlet Diameter Designation: Outside Diameter
- Muffler Overall Length: 29.0
- Muffler Reversible: No
- Muffler Shape: Oval
- Outlet 1 Outside Diameter: 2.750
- Outlet Configuration: Offset
- Overall Length: 29.000
- Product Grade: Economy
- Reversible: No
- Shape: Oval
- Supplier Company Name: Tenneco, Inc
- Total Part VIO: 4072207
- Universal Or Specific Fit: Specific
- UPC: 086387213561
- Part Description: 2003 GMC Sierra 1500 Quiet Flow Stainless Steel Oval Aluminized Exhaust Muffler
Vehicle Fitment- 2003 GMC Sierra 1500 | All Trims | 6 Cyl 4.3L
- 2003 GMC Sierra 1500 | All Trims | 8 Cyl 4.8L
- 2003 GMC Sierra 1500 | All Trims | 8 Cyl 5.3L
$89.82
Walker® Soundfx Steel Oval Direct Fit Aluminized Exhaust Muffler for 2003 GMC Sierra 1500
PartNumber: 18823Product Specifications- Notes: If Welded Assy, Replace All Reqd Parts; Optional; SoundFX for 21356
- Body Height: 7.000
- Body Length: 24.000
- Body Material: Steel
- Body Width: 9.000
- Exhaust Component Mount Type: Uses Factory Hangers
- Finish: Aluminized
- Grade Type: Regular
- Inlet 1 Inside Diameter: 2.750
- Inlet 1 Type: Pipe Connection
- Inlet Configuration: Offset
- Inlet Offset: 1.625
- Internet Product Code (IPC): 8465E046C4A
- Item has MSDS (SDS): N
- Max Year Covered: 2007
- MFG Brand Name: Walker Exhaust
- MFG Model # (Series): 18823
- MFG Name: Tenneco, Inc
- Min Year Covered: 1999
- Most Popular Make / Model: Chevrolet Silverado 1500
- Most Popular Year: 2004
- Muffler Body Height: 7
- Muffler Body Length: 24
- Muffler Body Material: Steel
- Muffler Body Width: 9
- Muffler Color / Finish: Aluminized
- Muffler Inlet: Offset
- Muffler Inlet Connection Type: Pipe Connection
- Muffler Inlet Count: 1
- Muffler Inlet Diameter (in): 2.75
- Muffler Inlet Diameter Designation: Inside Diameter
- Muffler Outlet: Offset
- Muffler Outlet Connection Type: Pipe Connection
- Muffler Outlet Count: 1
- Muffler Outlet Diameter (in): 2.75
- Muffler Outlet Diameter Designation: Outside Diameter
- Muffler Overall Length: 29
- Muffler Reversible: No
- Muffler Shape: Oval
- Outlet 1 Outside Diameter: 2.750
- Outlet Configuration: Offset
- Overall Length: 29.000
- Product Grade: Economy
- Reversible: No
- Shape: Oval
- Supplier Company Name: Tenneco, Inc
- Total Part VIO: 4072207
- Universal Or Specific Fit: Specific
- UPC: 086387188234
- Part Description: 2003 GMC Sierra 1500 Soundfx Steel Oval Direct Fit Aluminized Exhaust Muffler
Vehicle Fitment- 2003 GMC Sierra 1500 | All Trims | 6 Cyl 4.3L
- 2003 GMC Sierra 1500 | All Trims | 8 Cyl 4.8L
- 2003 GMC Sierra 1500 | All Trims | 8 Cyl 5.3L
$42.87
Walker® Soundfx Steel Oval Direct Fit Aluminized Exhaust Muffler for 2003 GMC Sierra 1500
PartNumber: 18138Product Specifications- Notes: If Welded Assy, Replace All Reqd Parts; Optional; SoundFX Universal for 21356; Modifications and/or Additional Parts Reqd.
- Automotive Item Grade: OEM Standard Part
- Connection Type: Pipe
- Inlet - Outlet Configuration: Offset Inlet - Offset Outlet
- Inlet Diameter Designation: Inside Diameter
- Inlet Quantity: 1 Inlet
- Muffler Body Finish: Aluminized
- Muffler Body Height: 7"
- Muffler Body Length: 24"
- Muffler Body Material: Steel
- Muffler Body Shape: Oval
- Muffler Body Width: 9"
- Muffler Inlet Diameter: 2.75"
- Muffler Outlet Diameter: 2.75"
- Muffler Overall Length: 29"
- Muffler Reversible: No
- Muffler Series: SoundFX™
- Muffler Type: Combination
- Outlet Diameter Designation: Outside Diameter
- Outlet Quantity: 1 Outlet
- UPC: 086387181389
- Part Description: 2003 GMC Sierra 1500 Soundfx Steel Oval Direct Fit Aluminized Exhaust Muffler
Vehicle Fitment- 2003 GMC Sierra 1500 | All Trims | 6 Cyl 4.3L
- 2003 GMC Sierra 1500 | All Trims | 8 Cyl 4.8L
- 2003 GMC Sierra 1500 | All Trims | 8 Cyl 5.3L
$47.00
OEM (Genuine) 2003 GMC Sierra 1500 Exhaust Muffler Assembly (W/ Exhaust & T/Pipe & 3W
PartNumber: 15798962
Product Specifications- Notes: Silverado, Sierra; 6.0L; 6 1/2 Box; Federal; Extended Cab; W/O Heavy Duty
- Other Names: Muffler
- Item Dimensions: 122.9 x 24.4 x 15.6 inches
- Item Weight: 68.80 Pounds
- Fitment Type: Direct Replacement
- Replaces: 15094497, 15147361, 15070023, 15113072, 15103198
- Part Description: 2003 GMC Sierra 1500 Exhaust Muffler Assembly (W/ Exhaust & T/Pipe & 3W
Vehicle Fitment- 2003 GMC Sierra 1500 | Base, Denali, SLE, SLT, WT | 8 Cyl 6.0 L GAS
OEM (Genuine) 2003 GMC Sierra 1500 Muffler Asm-Exhaust (W/ Exhaust & T/Pipe & 3W
PartNumber: 15798954Product Specifications- Notes: Silverado, Sierra; 6.0L; 6 1/2 Box; Federal; Extended Cab; W/Heavy Duty
- Other Names: Muffler
- Item Dimensions: 127.3 x 26.6 x 17.1 inches
- Item Weight: 68.10 Pounds
- Fitment Type: Direct Replacement
- Replaces: 15147362, 15113073
- Part Description: 2003 GMC Sierra 1500 Muffler Asm-Exhaust (W/ Exhaust & T/Pipe & 3W
Vehicle Fitment- 2003 GMC Sierra 1500 | Base, Denali, SLE, SLT, WT | 8 Cyl 6.0 L GAS
OEM (Genuine) 2003 GMC Sierra 1500 Muffler
PartNumber: 15798948Product Specifications- Notes: Silverado, Sierra; 6.0L; 6 1/2 Box; California; Crew Cab;Silverado, Sierra; 6.0L; 6 1/2 Box; Federal; Crew Cab
- Other Names: Muffler
- Item Dimensions: 152.7 x 26.3 x 15.5 inches
- Item Weight: 75.60 Pounds
- Fitment Type: Direct Replacement
- Replaces: 15113063, 15103189, 15147353, 15077779, 15077763
- Part Description: 2003 GMC Sierra 1500 Muffler
Vehicle Fitment- 2003 GMC Sierra 1500 | Base, Denali, SLE, SLT, WT | 8 Cyl 6.0 L GAS
OEM (Genuine) 2003 GMC Sierra 1500 Exhaust Muffler Assembly (W/ Exhaust & T/Pipe & 3W
PartNumber: 15798946Product Specifications- Notes: Silverado, Sierra; 6.0L; 6 1/2 Box; California; Extended Cab; All
- Other Names: Muffler
- Item Dimensions: 131.9 x 31.3 x 17.3 inches
- Item Weight: 76.20 Pounds
- Fitment Type: Direct Replacement
- Part Description: 2003 GMC Sierra 1500 Exhaust Muffler Assembly (W/ Exhaust & T/Pipe & 3W
Vehicle Fitment- 2003 GMC Sierra 1500 | Base, C3, Denali, SLE, SLT, WT | 8 Cyl 6.0 L GAS
OEM (Genuine) 2003 GMC Sierra 1500 Exhaust Muffler Assembly (W/ Exhaust & T/Pipe & 3W
PartNumber: 15798950
Product Specifications- Notes: Silverado, Sierra; 6.0L; 8 Box; W/O Extended Cab; W/O Rear Exit Exhaust; California; W/Heavy Duty;Silverado, Sierra; 6.0L; 8 Box; W/O Extended Cab; W/O Rear Exit Exhaust; Federal; W/Heavy Duty
- Other Names: Muffler
- Item Dimensions: 110.4 x 30.9 x 17.1 inches
- Item Weight: 57.70 Pounds
- Fitment Type: Direct Replacement
- Part Description: 2003 GMC Sierra 1500 Exhaust Muffler Assembly (W/ Exhaust & T/Pipe & 3W
Vehicle Fitment- 2003 GMC Sierra 1500 | Base, C3, Denali, SLE, SLT, WT | 8 Cyl 6.0 L GAS
OEM (Genuine) 2003 GMC Sierra 1500 Exhaust Muffler Assembly (W/ Exhaust Pipe & Tail Pipe)
PartNumber: 10376418
Product Specifications- Notes: Silverado, Sierra; 4.8L, 5.3L; 1/2 Ton; 6 1/2 Box; W/Extended Cab
- Other Names: Muffler
- Item Dimensions: 131.0 x 31.5 x 14.2 inches
- Item Weight: 47.30 Pounds
- Fitment Type: Direct Replacement
- Replaces: 15091104, 15128256, 15198940
- Part Description: 2003 GMC Sierra 1500 Exhaust Muffler Assembly (W/ Exhaust Pipe & Tail Pipe)
Vehicle Fitment- 2003 GMC Sierra 1500 | Base, HT, Hybrid, SL, SLE, SLT, WT | 8 Cyl 4.8 L GAS, 8 Cyl 5.3 L ELECTRIC/GAS, 8 Cyl 5.3 L FLEX, 8 Cyl 5.3 L GAS
OEM (Genuine) 2003 GMC Sierra 1500 Exhaust Muffler Assembly (W/ Exhaust Pipe & Tail Pipe)
PartNumber: 10376414Product Specifications- Notes: Silverado, Sierra; 4.8L, 5.3L; 1/2 Ton; 8 Box; W/O Extended Cab
- Other Names: Muffler
- Item Dimensions: 114.5 x 33.5 x 4.2 inches
- Item Weight: 73.20 Pounds
- Fitment Type: Direct Replacement
- Replaces: 15187878, 15091102, 15128252
- Part Description: 2003 GMC Sierra 1500 Exhaust Muffler Assembly (W/ Exhaust Pipe & Tail Pipe)
Vehicle Fitment- 2003 GMC Sierra 1500 | Base, HT, Hybrid, SL, SLE, SLT, WT | 8 Cyl 4.8 L GAS, 8 Cyl 5.3 L ELECTRIC/GAS, 8 Cyl 5.3 L FLEX, 8 Cyl 5.3 L GAS
OEM (Genuine) 2003 GMC Sierra 1500 Exhaust Muffler Assembly (W/ Exhaust Pipe & Tail Pipe)
PartNumber: 25862737
Product Specifications- Notes: 4.3 Liter Gas, 8 Foot Bed; Silverado, Sierra; 4.3L; 1/2 Ton; 8 Box
- Other Names: Muffler
- Item Dimensions: 119.9 x 31.5 x 14.2 inches
- Item Weight: 41.40 Pounds
- Fitment Type: Direct Replacement
- Replaces: 15040397, 15187877, 15091098, 10376412, 15128250
- Part Description: 2003 GMC Sierra 1500 Exhaust Muffler Assembly (W/ Exhaust Pipe & Tail Pipe)
Vehicle Fitment- 2003 GMC Sierra 1500 | Base, HT, SL, SLE, SLT, WT | 6 Cyl 4.3 L GAS
OEM (Genuine) 2003 GMC Sierra 1500 Exhaust Muffler Assembly (W/ Exhaust Pipe & Tail Pipe)
PartNumber: 10376413
Product Specifications- Notes: Silverado, Sierra; 4.8L, 5.3L; 1/2 Ton; 6 1/2 Box; W/O Extended Cab; 4.8 Liter Gas, 6 1/2 Foot Bed; 5.3 Liter Gas, 6 1/2 Foot Bed
- Other Names: Muffler
- Item Dimensions: 104.4 x 33.2 x 104.0 inches
- Item Weight: 74.20 Pounds
- Fitment Type: Direct Replacement
- Replaces: 15756778, 15128251, 15040398, 15187874
- Part Description: 2003 GMC Sierra 1500 Exhaust Muffler Assembly (W/ Exhaust Pipe & Tail Pipe)
Vehicle Fitment- 2003 GMC Sierra 1500 | Base, HT, Hybrid, SL, SLE, SLT, WT | 8 Cyl 4.8 L GAS, 8 Cyl 5.3 L ELECTRIC/GAS, 8 Cyl 5.3 L FLEX, 8 Cyl 5.3 L GAS
OEM (Genuine) 2003 GMC Sierra 1500 Muffler Asm-Exhaust (W/ Exhaust & T/Pipe & 3W
PartNumber: 15798949
Product Specifications- Notes: Silverado, Sierra; 6.0L; 8 Box; W/Extended Cab; W/O Rear Exit Exhaust; All
- Other Names: Muffler, Muffler & Pipe
- Item Dimensions: 137.7 x 30.6 x 17.3 inches
- Item Weight: 76.70 Pounds
- Fitment Type: Direct Replacement
- Part Description: 2003 GMC Sierra 1500 Muffler Asm-Exhaust (W/ Exhaust & T/Pipe & 3W
Vehicle Fitment- 2003 GMC Sierra 1500 | Base, C3, Denali, SLE, SLT, WT | 8 Cyl 6.0 L GAS
OEM (Genuine) 2003 GMC Sierra 1500 Muffler Asm-Exhaust (W/ Exhaust & T/Pipe & 3W
PartNumber: 15147356Product Specifications- Notes: Silverado, Sierra; 6.0L; 8 Box; W/O Extended Cab; W/O Rear Exit Exhaust; California; W/O Heavy Duty;Silverado, Sierra; 6.0L; 8 Box; W/O Extended Cab; W/O Rear Exit Exhaust; Federal; W/O Heavy Duty
- Other Names: Muffler
- Item Dimensions: 97.7 x 32.2 x 15.5 inches
- Item Weight: 66.20 Pounds
- Fitment Type: Direct Replacement
- Replaces: 88983230, 15070019
- Part Description: 2003 GMC Sierra 1500 Muffler Asm-Exhaust (W/ Exhaust & T/Pipe & 3W
Vehicle Fitment- 2003 GMC Sierra 1500 | Base, Denali, SLE, SLT, WT | 8 Cyl 6.0 L GAS
OEM (Genuine) 2003 GMC Sierra 1500 Muffler Asm-Exhaust (W/ Exhaust Pipe & Tail Pipe)
PartNumber: 25862736Product Specifications- Notes: Silverado, Sierra; 4.3L; 1/2 Ton; 6 1/2 Box; W/O Extended Cab
- Other Names: Muffler
- Item Dimensions: 104.1 x 32.1 x 14.0 inches
- Item Weight: 34.40 Pounds
- Fitment Type: Direct Replacement
- Replaces: 15187873, 10376411, 15091097, 15128249
- Part Description: 2003 GMC Sierra 1500 Muffler Asm-Exhaust (W/ Exhaust Pipe & Tail Pipe)
Vehicle Fitment- 2003 GMC Sierra 1500 | Base, SL, SLE, SLT, WT | 6 Cyl 4.3 L GAS
OEM (Genuine) 2003 GMC Sierra 1500 Exhaust Muffler Assembly (W/ Exhaust Pipe & Tail Pipe
PartNumber: 15040396Product Specifications- Notes: 4.3 Liter Gas, 6 1/2 Foot Bed
- Other Names: Muffler
- Item Dimensions: 105.0 x 27.8 x 4.1 inches
- Item Weight: 37.40 Pounds
- Fitment Type: Direct Replacement
- Part Description: 2003 GMC Sierra 1500 Exhaust Muffler Assembly (W/ Exhaust Pipe & Tail Pipe
Vehicle Fitment- 2003 GMC Sierra 1500 | Base, HT, SL, SLE, SLT, WT | 6 Cyl 4.3 L GAS
OEM (Genuine) 2003 GMC Sierra 1500 Exhaust Muffler Assembly (W/ Exhaust Pipe & Tail Pipe)
PartNumber: 25862738Product Specifications- Notes: Silverado, Sierra; 4.3L; 1/2 Ton; 6 1/2 Box; W/Extended Cab
- Other Names: Muffler
- Item Dimensions: 128.5 x 32.4 x 14.2 inches
- Item Weight: 40.80 Pounds
- Fitment Type: Direct Replacement
- Replaces: 10376417, 15091103, 15128255, 15756780, 15198939
- Part Description: 2003 GMC Sierra 1500 Exhaust Muffler Assembly (W/ Exhaust Pipe & Tail Pipe)
Vehicle Fitment- 2003 GMC Sierra 1500 | Base, HT, SL, SLE, SLT, WT | 6 Cyl 4.3 L GAS
OEM (Genuine) 2003 GMC Sierra 1500 Muffler Asm-Exhaust (W/ Exhaust Pipe & Tail Pipe)
PartNumber: 10376416
Product Specifications- Notes: Silverado, Sierra; 4.8L, 5.3L; 1/2 Ton; 8 Box; W/Extended Cab; 4.8 Liter Gas, 8 Foot Bed; 5.3 Liter Gas, 8 Foot Bed
- Other Names: Muffler
- Item Weight: 49.90 Pounds
- Fitment Type: Direct Replacement
- Part Description: 2003 GMC Sierra 1500 Muffler Asm-Exhaust (W/ Exhaust Pipe & Tail Pipe)
Vehicle Fitment- 2003 GMC Sierra 1500 | Base, HT, Hybrid, SL, SLE, SLT, WT | 8 Cyl 4.8 L GAS, 8 Cyl 5.3 L ELECTRIC/GAS, 8 Cyl 5.3 L FLEX, 8 Cyl 5.3 L GAS
OEM (Genuine) 2003 GMC Sierra 1500 Muffler
PartNumber: 15113058
Product Specifications- Notes: 6.0 Liter Gas
- Part Description: 2003 GMC Sierra 1500 Muffler
Vehicle Fitment- 2003 GMC Sierra 1500 | Base, Denali, SLE, SLT, WT | 8 Cyl 6.0 L GAS