This bulletin advises of a new vacuum pump and pulley and a new way to route and secure the vacuum hose.
Chevrolet technical service bulletin 23-NA-186 for 2016-2022 Chevrolet 3500, 2016-2019, 2024 Chevrolet Low Cab Forward 3500 and 2016-2020, 2022 Chevrolet 4500 and others.
- Bulletin number
- 23-NA-186
- Component
- Engine and engine cooling
- Summary
- This bulletin advises of a new vacuum pump and pulley and a new way to route and secure the vacuum hose.
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