Non-Safety Campaign â An incorrectly set VECU software parameter is causing the running lamps to be...
Peterbilt technical service bulletin 34-091 for 2021 Peterbilt 579.
- Bulletin number
- 34-091
- Component
- Electrical system
- Summary
- Non-Safety Campaign â An incorrectly set VECU software parameter is causing the running lamps to be inactive for certain, US registered, model year 2021 579 chassis. The parameter can be correctly set by reflashing the VECU  with updated software.
Owners of these vehicles have filed 1 complaints in the electrical category.
Vehicles covered
- Peterbilt 579 2021 2021
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