There is an update to the Base Emissions Warranty Limits table [PR1.1]and general certification...
Kenworth technical service bulletin 99-052 for 2026-2027 Kenworth T680, 2026-2027 Peterbilt 579 and 2026 Kenworth T880 and others.
- Bulletin number
- 99-052
- Component
- Unknown or other
- Summary
- There is an update to the Base Emissions Warranty Limits table [PR1.1]and general certification information in certain Engine Model Year (EMY) 2026 MX-11 and MX-13 Operator’s Manuals.
Vehicles covered
- Kenworth T680 2026-2027 20262027
- Peterbilt 579 2026-2027 20262027
- Kenworth T880 2026 2026
- Peterbilt 567 2026 2026
- Peterbilt 520 2026 2026
- Kenworth L770 2026 2026
- Kenworth W990 2026 2026
- Peterbilt 589 2026 2026
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