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Walker 55728 Exhaust Resonator and Pipe Assembly
Walker 55728 Exhaust Resonator Assembly
Walker 55728 is an exhaust resonator and pipe assembly built for OE-style fit, flow, and sound control. It uses tuned resonator technology to help maintain the original exhaust character while matching the factory-style layout for GMC Yukon XL applications.
- Part number: 55728
- Inlet outside diameter: 2.625 in.
- Outlet outside diameter: 2.75 in.
- Overall length: 57.75 in.
- Steel pipe and steel body construction
- Aluminized finish for added corrosion resistance
- Round 12 in. resonator body
- 1 inlet, pipe connection
- 1 outlet, spout
OE-Style Fit and Sound
This Walker exhaust resonator assembly is engineered to fit, perform, and sound like the original system. The steel construction and precise tuning help support smooth exhaust flow and factory-like sound characteristics on 2015-2020 GMC Yukon XL models. If you are replacing a worn resonator or pipe section, Walker 55728 provides a direct-fit style solution for the GMC Yukon XL exhaust system.
This part cross-references OE numbers 23310248 and 84327963 for the same application.
Common Problems This Part Can Address
- Exhaust drone or unwanted resonance from a damaged resonator
- Rust or corrosion in the factory exhaust pipe assembly
- Cracked, leaking, or weakened exhaust tubing
- Loss of OE-style exhaust tone after exhaust system wear
- Fitment issues when replacing a factory resonator and pipe section
Installation Notes and Tips
Fits 2020 GMC Yukon XL, N/A. Fits 2015-2019 GMC Yukon XL, N/A. If the original assembly is welded in place, replace all required adjoining parts during service to ensure proper alignment and sealing. Verify inlet and outlet diameters, overall length, and routing before installation on your GMC Yukon XL.
Quality Assurance
Walker designs this resonator assembly to match original-system fit, performance, and sound characteristics using precise tuning methods and OE-style construction.
| Brand | Walker |
|---|---|
| Part Number | 55728 |
| Inlet Outside Diameter | 2.625 |
| Outlet Outside Diameter | 2.75 |
| Muffler Body Length | 12 |
| Pipe Material | Steel |
| Overall Length | 57.75 |
| Body 1 Height | 6 |
| Body 1 Length | 12 |
| Body 1 Shape | Round |
| Body 1 Width | 6 |
| Body Material | Steel |
| Finish | Aluminized |
| Inlet Quantity | 1 |
| Inlet Type | Pipe connection |
| Outlet Quantity | 1 |
| Outlet Type | Spout |
This part fits 6 vehicles. Search below:
| Year | Make | Model | Liters | Cylinders | Position | Notes |
|---|---|---|---|---|---|---|
| 2020 | GMC | Yukon XL | 5.3L | V8 | N/A | |
| 2019 | GMC | Yukon XL | 5.3L | V8 | N/A | If welded assembly, replace all required parts |
| 2018 | GMC | Yukon XL | 5.3L | V8 | N/A | If welded assembly, replace all required parts |
| 2017 | GMC | Yukon XL | 5.3L | V8 | N/A | If welded assembly, replace all required parts |
| 2016 | GMC | Yukon XL | 5.3L | V8 | N/A | If welded assembly, replace all required parts |
| 2015 | GMC | Yukon XL | 5.3L | V8 | N/A | If welded assembly, replace all required parts |
* Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.
This part directly replaces or is cross-referenced with the following part numbers:
Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.