How to replace the muffler on GMC Envoy?

Proper vehicle elevation through support becomes essential before beginning Muffler replacement. All exhausted system parts requiring replacement must be new because damaged or corroded components are unfit for reuse. Vehicle owners must order both the resonator and tailpipe for vehicles using the ll8 engine system although these components may be clamped together. Start by evaluating exhaust system components for reuse and detach the frame brace. Begin by removing the nuts fixing the Muffler to the catalytic converter pipe then extract the Muffler from the tailpipe assembly at its hanger insulators. Drop the Muffler-tailpipe assembly before cutting through the Exhaust Pipe while supported at the exhaust system. Remove the Muffler from tailpipe following this procedure. During installation position the new Muffler onto the tailpipe pipe and lock it into position by connecting it to the hanger insulators while strictly following the fastener recommendation. Fasten the Muffler to the catalytic converter through nuts that require torque of 45 n.m (33 lb ft). Attach the clamp loosely to secure the Muffler onto the tailpipe followed by tailpipe alignment before tightening clamp nuts to 50 n.m (37 lb ft). The final steps require leak testing of the exhaust system and installing the frame brace and lowering the vehicle back to its original position.

OEM GMC Envoy Muffler

Exhaust Muffler

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12 Mufflers found

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GMC Envoy Muffler W/Tpipe
Part Number: 12479984
$297.50 MSRP: $422.07
You Save: $124.57 (30%)
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Product Specifications
- Other Name: Muffler, Exhaust; Direct-Fit Exhaust; Exhaust System Kit; Exhaust Pipe; Muffler
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2002-2005 GMC Envoy | SLE, SLT | 6 Cyl 4.2 L GAS
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GMC Envoy Muffler W/Tpipe
Part Number: 25887916
$746.18 MSRP: $1120.61
You Save: $374.43 (34%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Other Name: Muffler Assembly-Exhaust (W/Resonator, Exhaust & Tail Pipe; Exhaust Pipe; Muffler; Muffler, Exhaust Tail Pipe; Muffler, Exhaust
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2006-2009 GMC Envoy | SLE, SLT | 6 Cyl 4.2 L GAS
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GMC Envoy Muffler
Part Number: 15847573
$774.88 MSRP: $1163.72
You Save: $388.84 (34%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Other Name: Muffler Assembly-Exhaust (W/Resonator, Exhaust & Tail Pipe; Muffler, Exhaust Tail Pipe; Muffler, Exhaust
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2006 GMC Envoy | SLE, SLT | 6 Cyl 4.2 L GAS
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GMC Envoy Muffler W/Tpipe
Part Number: 25839185
Product Specifications
- Other Name: Muffler Assembly-Exhaust (W/Resonator, Exhaust & Tail Pipe; Exhaust Pipe; Muffler; Muffler, Exhaust Tail Pipe; Muffler, Exhaust
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2006-2009 GMC Envoy | Denali | 8 Cyl 5.3 L GAS
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GMC Envoy Muffler W/Tpipe
Part Number: 25839184
Product Specifications
- Other Name: Muffler Assembly-Exhaust (W/Resonator, Exhaust & Tail Pipe; Exhaust Pipe; Muffler
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2008 GMC Envoy | Denali | 8 Cyl 5.3 L GAS
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GMC Envoy Muffler W/Tpipe
Part Number: 25887919
Product Specifications
- Other Name: Muffler Assembly-Exhaust (W/Resonator, Exhaust & Tail Pipe; Direct-Fit Exhaust; Exhaust System Kit; Exhaust Pipe; Muffler; Muffler, Exhaust Tail Pipe; Muffler, Exhaust
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2006-2009 GMC Envoy | SLE, SLT | 6 Cyl 4.2 L GAS
View related parts
GMC Envoy Muffler W/Tpipe
Part Number: 25839182
Product Specifications
- Other Name: Muffler Assembly-Exhaust (W/Resonator, Exhaust & Tail Pipe; Exhaust Pipe; Muffler; Muffler, Exhaust Tail Pipe; Muffler, Exhaust
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2006-2009 GMC Envoy | Denali | 8 Cyl 5.3 L GAS
View related parts
GMC Envoy Muffler W/Tpipe
Part Number: 25839181
Product Specifications
- Other Name: Muffler Assembly-Exhaust (W/Resonator, Exhaust & Tail Pipe; Exhaust Pipe; Muffler; Muffler, Exhaust Tail Pipe; Muffler, Exhaust
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2006-2009 GMC Envoy | Denali | 8 Cyl 5.3 L GAS
View related parts
GMC Envoy Muffler
Part Number: 15847578
Product Specifications
- Other Name: Muffler Assembly-Exhaust (W/Resonator, Exhaust & Tail Pipe; Muffler, Exhaust Tail Pipe; Muffler, Exhaust
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2006 GMC Envoy | Denali | 8 Cyl 5.3 L GAS
View related parts
GMC Envoy Muffler W/Tpipe
Part Number: 15847577
Product Specifications
- Other Name: Muffler Assembly-Exhaust (W/Resonator, Exhaust & Tail Pipe; Direct-Fit Exhaust; Exhaust System Kit; Exhaust Pipe; Muffler; Muffler, Exhaust Tail Pipe; Muffler, Exhaust
- Replaces: 15064263, 15185659, 15778682
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2002-2006 GMC Envoy | SLE, SLT | 6 Cyl 4.2 L GAS
View related parts
GMC Envoy Muffler
Part Number: 15847574
Product Specifications
- Other Name: Muffler Assembly-Exhaust (W/Resonator, Exhaust & Tail Pipe; Muffler, Exhaust Tail Pipe; Muffler, Exhaust
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2006 GMC Envoy | Denali | 8 Cyl 5.3 L GAS
View related parts
GMC Envoy Muffler W/Tpipe
Part Number: 15175774
Product Specifications
- Other Name: Muffler, Exhaust; Direct-Fit Exhaust; Exhaust System Kit; Exhaust Pipe; Muffler
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2005 GMC Envoy | Denali | 8 Cyl 5.3 L GAS

GMC Envoy Muffler

Our website offers an extensive catalog of genuine GMC Envoy Muffler at unbeatable prices. Every OEM GMC Envoy Muffler comes with a manufacturer's warranty, an easy return policy, and rapid delivery service. Don't miss out on this great opportunity!

GMC Envoy Muffler Parts Questions & Experts Answers

Muffler W/Tpipe
25887916
Q: How to replace the muffler on GMC Envoy?
A: Proper vehicle elevation through support becomes essential before beginning Muffler replacement. All exhausted system parts requiring replacement must be new because damaged or corroded components are unfit for reuse. Vehicle owners must order both the resonator and tailpipe for vehicles using the ll8 engine system although these components may be clamped together. Start by evaluating exhaust system components for reuse and detach the frame brace. Begin by removing the nuts fixing the Muffler to the catalytic converter pipe then extract the Muffler from the tailpipe assembly at its hanger insulators. Drop the Muffler-tailpipe assembly before cutting through the Exhaust Pipe while supported at the exhaust system. Remove the Muffler from tailpipe following this procedure. During installation position the new Muffler onto the tailpipe pipe and lock it into position by connecting it to the hanger insulators while strictly following the fastener recommendation. Fasten the Muffler to the catalytic converter through nuts that require torque of 45 n.m (33 lb ft). Attach the clamp loosely to secure the Muffler onto the tailpipe followed by tailpipe alignment before tightening clamp nuts to 50 n.m (37 lb ft). The final steps require leak testing of the exhaust system and installing the frame brace and lowering the vehicle back to its original position.

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