All Model 389X chassis with 7” exhaust pipes need silicone sealant applied
Peterbilt technical service bulletin 43-078 for 2022-2023 Peterbilt 389.
- Bulletin number
- 43-078
- Component
- Structure
- Summary
- All Model 389X chassis with 7” exhaust pipes need silicone sealant applied
Vehicles covered
- Peterbilt 389 2022-2023 20222023
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