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2004 GMC Sierra 1500

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Walker 18138 Exhaust Muffler
for 2004 GMC Sierra 1500

Walker 18138 Exhaust Muffler - 2004 GMC Sierra 1500 Image 1
Walker 18138 Exhaust Muffler - 2004 GMC Sierra 1500 Image 2
Walker 18138 Exhaust Muffler - 2004 GMC Sierra 1500

Walker
Brand:Walker
Part Number: 18138
UPC: 086387181389
Weight: 15.65 lbs
Condition:New



Availability:
0 in Stock
 OUT OF STOCK

Product Information

Description:

UNIVERSAL TRU-FIT MUFFLER

Featuring 100% aluminized steel for longer service life compared to low-carbon steel, Walker SoundFX universal mufflers deliver quality appearance and favorable acoustics while mechanical interior joints and spun-locked heads provide durability.

Features and Benefits:

  • BUILT TO LAST -- Internal partitions and mechanically joined tubes allow expansion and contraction during temperature changes to minimize distortion while spun-locked heads and OE-style spot welds provide stability and longer service life
  • FACTORY SOUND -- Louvered tubes help reduce radiated noise for factory-style sound quality compared to straight perforated tubes
  • FLEXIBLE SOLUTION -- Customizable design features expandable bushings for easy fitment and may require specialized fabrication and/or welding for installation
  • GET MORE MILES FROM YOUR MUFFLER -- Designed and tested to extend muffler life
  • RESISTS CORROSION -- Aluminized steel construction and internal drainage system helps reduce corrosion

Specifications:

Body Height:
7 in.
Body Length:
24 in.
Body Material:
Steel
Body Width:
9 in.
Finish:
Aluminized
Grade Type:
Regular
Inlet 1 Inside Diameter:
2.75 in.
Inlet 1 Type:
Pipe Connection
Inlet Configuration:
Offset
Inlet Inside Diameter:
2.75 in.
Inlet Offset:
2.625
Inlet Quantity:
1
Inlet Type:
Pipe Connection
Muffler Type:
Combination
Outlet 1 Outside Diameter:
2.75 in.
Outlet 1 Type:
Pipe Connection
Outlet Configuration:
Offset
Outlet Outside Diameter:
2.75 in.
Outlet Quantity:
1
Outlet Type:
Pipe Connection
Overall Length:
29 in.
Reversible:
No
Shape:
Oval
Tunable:
No
Universal Or Specific Fit:
Universal
AP Exhaust #:
5571
AP Exhaust #:
8963
Country of Origin:
US

Walker 18138 Exhaust Muffler compatibility with your 2004 GMC Sierra 1500...

Last Updated: 12/24/2023

Years Vehicle Per Vehicle Fit NotesFitment Notes

2006

 

2005

 

2004

 

2003

 

2002

 

2006

 

2005

 

2004

 

2003

 

2002

 
GMC Sierra 1500

4.3L V6 Gas OHV,
5.3L V8 Flex OHV
1
 
SoundFX Universal
Modifications and/or Additional Parts May Be Required for Installation
Wheel Base 119.0 In.
 

GMC Sierra 1500



4.3L V6 Gas OHV,
5.3L V8 Flex OHV SoundFX Universal
Modifications and/or Additional Parts May Be Required for Installation
Wheel Base 119.0 In.

1 Per Vehicle

2006

 

2005

 

2004

 

2003

 

2002

 

2006

 

2005

 

2004

 

2003

 

2002

 
GMC Sierra 1500

4.3L V6 Gas OHV,
5.3L V8 Flex OHV
1
 
SoundFX Universal
Modifications and/or Additional Parts May Be Required for Installation
Wheel Base 133.0 In.
 

GMC Sierra 1500



4.3L V6 Gas OHV,
5.3L V8 Flex OHV SoundFX Universal
Modifications and/or Additional Parts May Be Required for Installation
Wheel Base 133.0 In.

1 Per Vehicle

2006

 

2005

 

2004

 

2003

 

2002

 

2006

 

2005

 

2004

 

2003

 

2002

 
GMC Sierra 1500

4.3L V6 Gas OHV,
5.3L V8 Flex OHV
1
 
SoundFX Universal
Modifications and/or Additional Parts May Be Required for Installation
Wheel Base 143.5 In.
 

GMC Sierra 1500



4.3L V6 Gas OHV,
5.3L V8 Flex OHV SoundFX Universal
Modifications and/or Additional Parts May Be Required for Installation
Wheel Base 143.5 In.

1 Per Vehicle

2006

 

2005

 

2004

 

2003

 

2002

 

2006

 

2005

 

2004

 

2003

 

2002

 
GMC Sierra 1500

4.3L V6 Gas OHV,
5.3L V8 Flex OHV
1
 
SoundFX Universal
Modifications and/or Additional Parts May Be Required for Installation
Wheel Base 157.5 In.
 

GMC Sierra 1500



4.3L V6 Gas OHV,
5.3L V8 Flex OHV SoundFX Universal
Modifications and/or Additional Parts May Be Required for Installation
Wheel Base 157.5 In.

1 Per Vehicle

2006

 

2005

 

2004

 

2003

 

2002

 

2001

 

2000

 

1999

 

2006

 

2005

 

2004

 

2003

 

2002

 

2001

 

2000

 

1999

 
GMC Sierra 1500

4.8L V8 Gas OHV,
5.3L V8 Gas OHV
1
 
SoundFX Universal
Modifications and/or Additional Parts May Be Required for Installation
Wheel Base 119.0 In.
 

GMC Sierra 1500



4.8L V8 Gas OHV,
5.3L V8 Gas OHV SoundFX Universal
Modifications and/or Additional Parts May Be Required for Installation
Wheel Base 119.0 In.

1 Per Vehicle

2006

 

2005

 

2004

 

2003

 

2002

 

2001

 

2000

 

1999

 

2006

 

2005

 

2004

 

2003

 

2002

 

2001

 

2000

 

1999

 
GMC Sierra 1500

4.8L V8 Gas OHV,
5.3L V8 Gas OHV
1
 
SoundFX Universal
Modifications and/or Additional Parts May Be Required for Installation
Wheel Base 133.0 In.
 

GMC Sierra 1500



4.8L V8 Gas OHV,
5.3L V8 Gas OHV SoundFX Universal
Modifications and/or Additional Parts May Be Required for Installation
Wheel Base 133.0 In.

1 Per Vehicle

2006

 

2005

 

2004

 

2003

 

2002

 

2001

 

2000

 

1999

 

2006

 

2005

 

2004

 

2003

 

2002

 

2001

 

2000

 

1999

 
GMC Sierra 1500

4.8L V8 Gas OHV,
5.3L V8 Gas OHV
1
 
SoundFX Universal
Modifications and/or Additional Parts May Be Required for Installation
Wheel Base 143.5 In.
 

GMC Sierra 1500



4.8L V8 Gas OHV,
5.3L V8 Gas OHV SoundFX Universal
Modifications and/or Additional Parts May Be Required for Installation
Wheel Base 143.5 In.

1 Per Vehicle

2006

 

2005

 

2004

 

2003

 

2002

 

2001

 

2000

 

1999

 

2006

 

2005

 

2004

 

2003

 

2002

 

2001

 

2000

 

1999

 
GMC Sierra 1500

4.8L V8 Gas OHV,
5.3L V8 Gas OHV
1
 
SoundFX Universal
Modifications and/or Additional Parts May Be Required for Installation
Wheel Base 157.5 In.
 

GMC Sierra 1500



4.8L V8 Gas OHV,
5.3L V8 Gas OHV SoundFX Universal
Modifications and/or Additional Parts May Be Required for Installation
Wheel Base 157.5 In.

1 Per Vehicle

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