How to Replace the Muffler with a 6.0L Engine on GMC Sierra 3500 Classic?

The first step to replacing a Muffler on a 2500/3500 cab/chassis vehicle with 6.0l engine requires you to lift the vehicle for support and eliminate the spare tire if it exists. The installation of adjustable jack stands under the rear axle must be done before removing the rear axle vent hose and swivel clip from the rear brake crossover pipe if the vehicle has an 8.6 or 9.5 inch ring gear. Referring to vehicles with 10.5 inch ring gear rings, follow the procedures for the vent hose installation process. You need to start by taking out the rear Shock Absorber lower bolts and nuts before using the adjustable jack stands to lower the rear axle. You need to start by removing the exhaust Muffler to exhaust manifold pipe nuts and relaxing the exhaust Muffler clamp before pulling out the heated Oxygen Sensor (HO2S). A helper can assist in removing the insulators (1-4) from their positions on the front, intermediate, and rear Muffler assembly hangers after you apply lubrication to the 4 insulator areas. To install the parts, reapply lubrication to the 4 insulators then position the Muffler assembly with assistance before reinstalling the insulators (1-4). Tighten the exhaust Muffler clamp to 47 n.m (35 lb ft) after reinstalling the ho2s while installing the exhaust Muffler to exhaust manifold pipe nuts which should be tightened to 45 n.m (33 lb ft). Lift the rear axle through adjustable jack stands while reinstalling the rear Shock Absorber lower bolts and nuts securely to 95 n.m (70 lb ft). First install the rear axle vent hose and then position its swivel clip to the rear brake crossover pipe when you have a 10.5 inch ring gear. The rear axle vent hose and the vent hose swivel clip installation requires a 8.6 or 9.5 inch ring gear. If needed, replace the spare tire before taking down the vehicle by removing the adjustable jack stands.

OEM GMC Sierra 3500 Classic Muffler

Exhaust Muffler

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23 Mufflers found

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GMC Sierra 3500 Classic Muffler Part Number: 15798961
$1071.28 MSRP: $1595.91
You Save: $524.63 (33%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Muffler Assembly-Exhaust (W/Exhaust & Tail Pipe & 3W; Muffler, Exhaust
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2007 GMC Sierra 3500 Classic | SL, SLE, SLT, WT | 8 Cyl 6.0 L GAS, 8 Cyl 8.1 L GAS
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GMC Sierra 3500 Classic Muffler Part Number: 15798957
$942.56 MSRP: $1402.65
You Save: $460.09 (33%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Muffler Assembly-Exhaust (W/Exhaust & Tail Pipe & 3W; Muffler, Exhaust
- Replaces: 15147365, 15103204
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2007 GMC Sierra 3500 Classic | SL, SLE, SLT, WT | 8 Cyl 6.0 L GAS, 8 Cyl 8.1 L GAS
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GMC Sierra 3500 Classic 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
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2007 GMC Sierra 3500 Classic | SL, SLE, SLT, WT | 8 Cyl 8.1 L GAS
View related parts
GMC Sierra 3500 Classic Muffler Part Number: 19420118
$1051.07 MSRP: $1565.88
You Save: $514.81 (33%)
Product Specifications
- Other Name: Muffler Assembly, Exhaust (W/Exhaust & T/Pipe & 3Way Catalytic Converter) "Kit"; Exhaust Pipe; Muffler, Exhaust
- Replaces: 15147368, 15076107, 15199841, 15798960, 15113085
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2007 GMC Sierra 3500 Classic | SL, SLE, SLT, WT | 8 Cyl 6.0 L GAS, 8 Cyl 8.1 L GAS
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GMC Sierra 3500 Classic Muffler & Pipe Part Number: 15798947
Product Specifications
- Other Name: Muffler Assembly-Exhaust (W/Exhaust & Tail Pipe & 3W; Exhaust Pipe; Muffler; Muffler, Exhaust
- Replaces: 15147352
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2007 GMC Sierra 3500 Classic | SL, SLE, SLT, WT | 8 Cyl 8.1 L GAS
View related parts
GMC Sierra 3500 Classic Muffler & Pipe Part Number: 15229357
Product Specifications
- Other Name: Muffler Assembly-Exhaust (W/ Exhaust Pipe & Tail Pipe); Muffler, Exhaust; Exhaust Pipe; Muffler
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2007 GMC Sierra 3500 Classic | SL, SLE, SLT, WT | 8 Cyl 6.6 L DIESEL
View related parts
GMC Sierra 3500 Classic Muffler Part Number: 15229351
Product Specifications
- Other Name: Muffler, Exhaust
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2007 GMC Sierra 3500 Classic | SL, SLE, SLT, WT | 8 Cyl 6.6 L DIESEL
View related parts
GMC Sierra 3500 Classic Muffler & Pipe Part Number: 15798941
Product Specifications
- Other Name: Muffler, Exhaust; Exhaust Pipe; Muffler
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2007 GMC Sierra 3500 Classic | SL, SLE, SLT, WT | 8 Cyl 6.0 L GAS
View related parts
GMC Sierra 3500 Classic Muffler Part Number: 15229353
Product Specifications
- Other Name: Muffler Assembly-Exhaust (W/ Exhaust Pipe & Tail Pipe); Muffler, Exhaust
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2007 GMC Sierra 3500 Classic | SL, SLE, SLT, WT | 8 Cyl 6.6 L DIESEL
View related parts
GMC Sierra 3500 Classic Muffler Part Number: 15229352
Product Specifications
- Other Name: Muffler, Exhaust
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2007 GMC Sierra 3500 Classic | SL, SLE, SLT, WT | 8 Cyl 6.6 L DIESEL
View related parts
GMC Sierra 3500 Classic Muffler Part Number: 15798942
Product Specifications
- Other Name: Muffler, Exhaust
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2007 GMC Sierra 3500 Classic | SL, SLE, SLT, WT | 8 Cyl 6.0 L GAS
View related parts
GMC Sierra 3500 Classic Muffler & Pipe Part Number: 15229355
Product Specifications
- Other Name: Muffler, Exhaust; Exhaust Pipe; Muffler
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2007 GMC Sierra 3500 Classic | SL, SLE, WT | 8 Cyl 6.6 L DIESEL
View related parts
GMC Sierra 3500 Classic Muffler Part Number: 15229356
Product Specifications
- Other Name: Muffler, Exhaust
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2007 GMC Sierra 3500 Classic | SL, SLE, SLT, WT | 8 Cyl 6.6 L DIESEL
View related parts
GMC Sierra 3500 Classic Muffler Part Number: 15229358
Product Specifications
- Other Name: Muffler, Exhaust
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2007 GMC Sierra 3500 Classic | SL, SLE, SLT, WT | 8 Cyl 6.6 L DIESEL
View related parts
GMC Sierra 3500 Classic Muffler & Pipe Part Number: 15798952
Product Specifications
- Other Name: Muffler Assembly-Exhaust (W/Exhaust & Tail Pipe & 3W; Exhaust Pipe; Muffler; Muffler, Exhaust
- Replaces: 15113070
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2007 GMC Sierra 3500 Classic | SL, SLE, SLT, WT | 8 Cyl 6.0 L GAS, 8 Cyl 8.1 L GAS
View related parts
GMC Sierra 3500 Classic Muffler Part Number: 15798953
Product Specifications
- Other Name: Muffler Assembly-Exhaust (W/Exhaust & Tail Pipe & 3W; Muffler, Exhaust
- Replaces: 15757990
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2007 GMC Sierra 3500 Classic | SL, SLE, SLT, WT | 8 Cyl 6.0 L GAS, 8 Cyl 8.1 L GAS
View related parts
GMC Sierra 3500 Classic Muffler & Pipe Part Number: 15798949
Product Specifications
- Other Name: Muffler Assembly-Exhaust (W/Exhaust & Tail Pipe & 3W; Exhaust Pipe; Muffler; Muffler, Exhaust
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2007 GMC Sierra 3500 Classic | SL, SLE, SLT, WT | 8 Cyl 6.0 L GAS, 8 Cyl 8.1 L GAS
View related parts
GMC Sierra 3500 Classic Muffler Part Number: 15798951
Product Specifications
- Other Name: Muffler Assembly-Exhaust (W/Exhaust & Tail Pipe & 3W; Muffler, Exhaust
- Replaces: 15077789, 15757987
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2007 GMC Sierra 3500 Classic | SL, SLE, SLT, WT | 8 Cyl 6.0 L GAS, 8 Cyl 8.1 L GAS
View related parts
GMC Sierra 3500 Classic Muffler Part Number: 15798954
Product Specifications
- Other Name: Muffler Assembly-Exhaust (W/Exhaust & Tail Pipe & 3W; Muffler, Exhaust
- Replaces: 15147362, 15113073
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2007 GMC Sierra 3500 Classic | SL, SLE, SLT, WT | 8 Cyl 8.1 L GAS
View related parts
GMC Sierra 3500 Classic Muffler Part Number: 15798948
Product Specifications
- Other Name: Muffler Assembly-Exhaust (W/Exhaust & Tail Pipe & 3W; Muffler, Exhaust
- Replaces: 15077763, 15077779, 15147353, 15103189, 15113063
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2007 GMC Sierra 3500 Classic | SL, SLE, SLT, WT | 8 Cyl 6.0 L GAS, 8 Cyl 8.1 L GAS

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GMC Sierra 3500 Classic Muffler

Want to cut long-term maintenance and repair costs? Choose OEM Muffler. Those parts deliver top durability you can trust. On our site, you'll find a huge catalog of genuine GMC Sierra 3500 Classic parts. Prices are unbeatable, so you can keep more in your pocket. Every OEM GMC Sierra 3500 Classic Muffler includes a manufacturer's warranty. You can also get an easy return policy that keeps buying risk free. Fast delivery, get your car on the road quickly. It's simple to search, compare, and order. Stop guessing about quality or fit. Order today and save with parts that last.

GMC Sierra 3500 Classic Muffler Parts Questions & Experts Answers

Muffler
15798957
Q: How to Replace the Muffler with a 6.0L Engine on GMC Sierra 3500 Classic?
A:
The first step to replacing a Muffler on a 2500/3500 cab/chassis vehicle with 6.0l engine requires you to lift the vehicle for support and eliminate the spare tire if it exists. The installation of adjustable jack stands under the rear axle must be done before removing the rear axle vent hose and swivel clip from the rear brake crossover pipe if the vehicle has an 8.6 or 9.5 inch ring gear. Referring to vehicles with 10.5 inch ring gear rings, follow the procedures for the vent hose installation process. You need to start by taking out the rear Shock Absorber lower bolts and nuts before using the adjustable jack stands to lower the rear axle. You need to start by removing the exhaust Muffler to exhaust manifold pipe nuts and relaxing the exhaust Muffler clamp before pulling out the heated Oxygen Sensor (HO2S). A helper can assist in removing the insulators (1-4) from their positions on the front, intermediate, and rear Muffler assembly hangers after you apply lubrication to the 4 insulator areas. To install the parts, reapply lubrication to the 4 insulators then position the Muffler assembly with assistance before reinstalling the insulators (1-4). Tighten the exhaust Muffler clamp to 47 n.m (35 lb ft) after reinstalling the ho2s while installing the exhaust Muffler to exhaust manifold pipe nuts which should be tightened to 45 n.m (33 lb ft). Lift the rear axle through adjustable jack stands while reinstalling the rear Shock Absorber lower bolts and nuts securely to 95 n.m (70 lb ft). First install the rear axle vent hose and then position its swivel clip to the rear brake crossover pipe when you have a 10.5 inch ring gear. The rear axle vent hose and the vent hose swivel clip installation requires a 8.6 or 9.5 inch ring gear. If needed, replace the spare tire before taking down the vehicle by removing the adjustable jack stands.