Fix-As-Fail â A hill start assist (HSA) valve plumbing revision eliminates ice buildup in the HSA valve...
Peterbilt technical service bulletin 13-057 for 2020-2021 Peterbilt 579, 2020-2021 Peterbilt 389 and 2020-2021 Peterbilt 567 and others.
- Bulletin number
- 13-057
- Component
- Equipment
- Summary
- Fix-As-Fail â A hill start assist (HSA) valve plumbing revision eliminates ice buildup in the HSA valve exhaust in cold weather.Â
Vehicles covered
- Peterbilt 579 2020-2021 20202021
- Peterbilt 389 2020-2021 20202021
- Peterbilt 567 2020-2021 20202021
- Peterbilt 337 2020-2021 20202021
- Peterbilt 365 2020-2021 20202021
- Peterbilt 348 2020-2021 20202021
- Peterbilt 367 2020-2021 20202021
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