How to replace the muffler on 4.3L, 4.8L, and 5.3L engines on 2004 GMC Sierra 1500?

A mechanic should first properly raise and stabilize the vehicle to change mufflers in vehicles equipped with 4.3L, 4.8L, or 5.3L engines. You should first remove the exhaust muffler nuts before adding lubricant to exhaust insulators to make removal possible. The first step requires the removal of exhaust muffler brackets from the insulators before extracting the muffler itself. You should use lubricant on exhaust insulators during installation to make the process easier before putting the muffler on the insulators. Tighten exhaust muffler nuts to 40 Nm (30 ft. lbs.) while installing them.Welders must follow the Fastener Notice in Service Precautions while tightening the exhaust muffler nuts to 40 Nm (30 ft. lbs.).

OEM 2004 GMC Sierra 1500 Muffler

Exhaust Muffler

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14 Mufflers found

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2004 GMC Sierra 1500 Muffler
Part Number: 15798950
Product Specifications
- Other Name: Muffler Assembly-Exhaust (W/Exhaust & Tail Pipe & 3W; Muffler, Exhaust
- Item Weight: 59.90 Pounds
- Item Dimensions: 110.4 x 30.9 x 17.8 inches
- Condition: New
- Fitment Type: Direct Replacement
- SKU: 15798950
- Warranty: This genuine part is guaranteed by GM's factory warranty.
More Info
Fits the following 2004 GMC Sierra 1500 Submodels:
- Base, C3, Denali, SLE, SLT, WT | 8 Cyl 6.0 L GAS
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2004 GMC Sierra 1500 Muffler
Part Number: 15798948
Product Specifications
- Other Name: Muffler Assembly-Exhaust (W/Exhaust & Tail Pipe & 3W; Muffler, Exhaust
- Replaces: 15077763, 15077779, 15147353, 15103189, 15113063
- Item Weight: 70.80 Pounds
- Item Dimensions: 154.1 x 26.3 x 14.7 inches
- Condition: New
- Fitment Type: Direct Replacement
- SKU: 15798948
- Warranty: This genuine part is guaranteed by GM's factory warranty.
More Info
Fits the following 2004 GMC Sierra 1500 Submodels:
- Base, Denali, SLE, SLT, WT | 8 Cyl 6.0 L GAS
View related parts
2004 GMC Sierra 1500 Muffler
Part Number: 15798962
Product Specifications
- Other Name: Muffler Assembly-Exhaust (W/Exhaust & Tail Pipe & 3W; Muffler, Exhaust
- Replaces: 15070023, 15103198, 15113072, 15147361, 15094497
- Item Weight: 68.80 Pounds
- Item Dimensions: 125.3 x 24.7 x 15.5 inches
- Condition: New
- Fitment Type: Direct Replacement
- SKU: 15798962
- Warranty: This genuine part is guaranteed by GM's factory warranty.
More Info
Fits the following 2004 GMC Sierra 1500 Submodels:
- Base, Denali, SLE, SLT, WT | 8 Cyl 6.0 L GAS
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2004 GMC Sierra 1500 Muffler
Part Number: 15798954
Product Specifications
- Other Name: Muffler Assembly-Exhaust (W/Exhaust & Tail Pipe & 3W; Muffler, Exhaust
- Replaces: 15147362, 15113073
- Item Weight: 64.30 Pounds
- Item Dimensions: 127.3 x 25.8 x 17.6 inches
- Condition: New
- Fitment Type: Direct Replacement
- SKU: 15798954
- Warranty: This genuine part is guaranteed by GM's factory warranty.
More Info
Fits the following 2004 GMC Sierra 1500 Submodels:
- Base, Denali, SLE, SLT, WT | 8 Cyl 6.0 L GAS
View related parts
2004 GMC Sierra 1500 Muffler & Pipe
Part Number: 15798949
Product Specifications
- Other Name: Muffler Assembly-Exhaust (W/Exhaust & Tail Pipe & 3W; Exhaust Pipe; Muffler; Muffler, Exhaust
- Item Weight: 80.30 Pounds
- Item Dimensions: 140.4 x 31.2 x 17.0 inches
- Condition: New
- Fitment Type: Direct Replacement
- SKU: 15798949
- Warranty: This genuine part is guaranteed by GM's factory warranty.
More Info
Fits the following 2004 GMC Sierra 1500 Submodels:
- Base, C3, Denali, SLE, SLT, WT | 8 Cyl 6.0 L GAS
View related parts
2004 GMC Sierra 1500 Muffler
Part Number: 15147356
Product Specifications
- Other Name: Muffler Assembly-Exhaust (W/Exhaust & Tail Pipe & 3W; Muffler, Exhaust
- Replaces: 15070019, 88983230
- Item Weight: 64.90 Pounds
- Item Dimensions: 101.5 x 32.2 x 16.1 inches
- Condition: New
- Fitment Type: Direct Replacement
- SKU: 15147356
- Warranty: This genuine part is guaranteed by GM's factory warranty.
More Info
Fits the following 2004 GMC Sierra 1500 Submodels:
- Base, Denali, SLE, SLT, WT | 8 Cyl 6.0 L GAS
View related parts
2004 GMC Sierra 1500 Muffler
Part Number: 25862737
Product Specifications
- Other Name: Muffler, Exhaust
- Replaces: 10376412, 15128250, 15187877, 15091098, 15040397
- Item Weight: 41.40 Pounds
- Item Dimensions: 114.2 x 31.5 x 14.0 inches
- Condition: New
- Fitment Type: Direct Replacement
- SKU: 25862737
- Warranty: This genuine part is guaranteed by GM's factory warranty.
More Info
Fits the following 2004 GMC Sierra 1500 Submodels:
- Base, HT, SL, SLE, SLT, WT | 6 Cyl 4.3 L GAS
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2004 GMC Sierra 1500 Muffler
Part Number: 10376418
Product Specifications
- Other Name: Muffler, Exhaust; Direct-Fit Exhaust; Exhaust System Kit
- Replaces: 15128256, 15198940, 15091104
- Item Weight: 45.10 Pounds
- Item Dimensions: 127.3 x 31.5 x 13.9 inches
- Condition: New
- Fitment Type: Direct Replacement
- SKU: 10376418
- Warranty: This genuine part is guaranteed by GM's factory warranty.
More Info
Fits the following 2004 GMC Sierra 1500 Submodels:
- Base, HT, Hybrid, SL, SLE, SLT, WT | 8 Cyl 4.8 L GAS, 8 Cyl 5.3 L FLEX, 8 Cyl 5.3 L FULL HYBRID EV-GAS (FHEV), 8 Cyl 5.3 L GAS
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2004 GMC Sierra 1500 Muffler
Part Number: 10376414
Product Specifications
- Other Name: Muffler, Exhaust; Direct-Fit Exhaust; Exhaust System Kit
- Replaces: 15091102, 15128252, 15187878
- Item Weight: 71.10 Pounds
- Item Dimensions: 119.1 x 33.8 x 4.1 inches
- Condition: New
- Fitment Type: Direct Replacement
- SKU: 10376414
- Warranty: This genuine part is guaranteed by GM's factory warranty.
More Info
Fits the following 2004 GMC Sierra 1500 Submodels:
- Base, HT, Hybrid, SL, SLE, SLT, WT | 8 Cyl 4.8 L GAS, 8 Cyl 5.3 L FLEX, 8 Cyl 5.3 L FULL HYBRID EV-GAS (FHEV), 8 Cyl 5.3 L GAS
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2004 GMC Sierra 1500 Muffler
Part Number: 25862736
Product Specifications
- Other Name: Muffler, Exhaust
- Replaces: 10376411, 15128249, 15091097, 15187873
- Item Weight: 32.80 Pounds
- Item Dimensions: 100.1 x 32.4 x 13.8 inches
- Condition: New
- Fitment Type: Direct Replacement
- SKU: 25862736
- Warranty: This genuine part is guaranteed by GM's factory warranty.
More Info
Fits the following 2004 GMC Sierra 1500 Submodels:
- Base, SL, SLE, SLT, WT | 6 Cyl 4.3 L GAS
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2004 GMC Sierra 1500 Muffler
Part Number: 25862738
Product Specifications
- Other Name: Muffler, Exhaust
- Replaces: 15198939, 15756780, 15091103, 15128255, 10376417
- Item Weight: 42.80 Pounds
- Item Dimensions: 126.1 x 31.5 x 14.0 inches
- Condition: New
- Fitment Type: Direct Replacement
- SKU: 25862738
- Warranty: This genuine part is guaranteed by GM's factory warranty.
More Info
Fits the following 2004 GMC Sierra 1500 Submodels:
- Base, HT, SL, SLE, SLT, WT | 6 Cyl 4.3 L GAS
View related parts
2004 GMC Sierra 1500 Muffler
Part Number: 10376416
Product Specifications
- Other Name: Muffler, Exhaust; Direct-Fit Exhaust; Exhaust System Kit
- Item Weight: 49.40 Pounds
- Condition: New
- Fitment Type: Direct Replacement
- SKU: 10376416
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following 2004 GMC Sierra 1500 Submodels:
- Base, HT, Hybrid, SL, SLE, SLT, WT | 8 Cyl 4.8 L GAS, 8 Cyl 5.3 L FLEX, 8 Cyl 5.3 L FULL HYBRID EV-GAS (FHEV), 8 Cyl 5.3 L GAS
View related parts
2004 GMC Sierra 1500 Muffler
Part Number: 10376413
Product Specifications
- Other Name: Muffler, Exhaust; Direct-Fit Exhaust; Exhaust System Kit
- Replaces: 15040398, 15187874, 15128251, 15756778
- Item Weight: 70.70 Pounds
- Item Dimensions: 101.4 x 32.8 x 103.0 inches
- Condition: New
- Fitment Type: Direct Replacement
- SKU: 10376413
- Warranty: This genuine part is guaranteed by GM's factory warranty.
More Info
Fits the following 2004 GMC Sierra 1500 Submodels:
- Base, HT, Hybrid, SL, SLE, SLT, WT | 8 Cyl 4.8 L GAS, 8 Cyl 5.3 L FLEX, 8 Cyl 5.3 L FULL HYBRID EV-GAS (FHEV), 8 Cyl 5.3 L GAS
View related parts
2004 GMC Sierra 1500 Muffler
Part Number: 15798946
$1007.38 MSRP: $1500.27
You Save: $492.89 (33%)
Product Specifications
- Other Name: Muffler Assembly-Exhaust (W/Exhaust & Tail Pipe & 3W; Muffler, Exhaust
- Item Weight: 161.60 Pounds
- Item Dimensions: 144.9 x 45.5 x 23.1 inches
- Condition: New
- Fitment Type: Direct Replacement
- SKU: 15798946
- Warranty: This genuine part is guaranteed by GM's factory warranty.
More Info
Fits the following 2004 GMC Sierra 1500 Submodels:
- Base, C3, Denali, SLE, SLT, WT | 8 Cyl 6.0 L GAS

2004 GMC Sierra 1500 Muffler

With a comprehensive array of OEM 2004 GMC Sierra 1500 Muffler, from fuel pumps to door handles, our website is a one-stop-shop for your needs. All our genuine 2004 GMC Sierra 1500 Muffler are backed by the manufacturer's warranty and are offered at competitive prices in the market. Rest assured, you can shop with complete confidence.

2004 GMC Sierra 1500 Muffler Parts Questions & Experts Answers

Q: How to replace the muffler on 4.3L, 4.8L, and 5.3L engines on 2004 GMC Sierra 1500?
A: A mechanic should first properly raise and stabilize the vehicle to change mufflers in vehicles equipped with 4.3L, 4.8L, or 5.3L engines. You should first remove the exhaust muffler nuts before adding lubricant to exhaust insulators to make removal possible. The first step requires the removal of exhaust muffler brackets from the insulators before extracting the muffler itself. You should use lubricant on exhaust insulators during installation to make the process easier before putting the muffler on the insulators. Tighten exhaust muffler nuts to 40 Nm (30 ft. lbs.) while installing them.Welders must follow the Fastener Notice in Service Precautions while tightening the exhaust muffler nuts to 40 Nm (30 ft. lbs.).