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March 28, 2026 Service campaign

Halogen Headlamp Operation -Activating the Flash to Pass system on certain [Kenworth / Peterbilt] vehicles may

Kenworth technical service bulletin 34-100 for 2026 Kenworth T680, 2026 Kenworth T880 and 2026 Kenworth T380 and others.

Bulletin number
34-100 (34-100)
Component
Exterior lighting
Summary
Halogen Headlamp Operation -Activating the Flash to Pass system on certain [Kenworth / Peterbilt] vehicles may cause one headlamp to deactivate.

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