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February 14, 2024 Service bulletin

This service bulletin helps diagnose/reduce possible CCND issues on Transfer Cases

Chevrolet technical service bulletin 23-NA-185 for 2019-2024 Chevrolet Silverado 1500, 2019-2024 GMC Sierra 1500 and 2020-2023 Chevrolet Suburban and others.

Bulletin number
23-NA-185
Component
Electrical system
Summary
This service bulletin helps diagnose/reduce possible CCND issues on Transfer Cases - Service 4WD on DIC, Intermittent Failures, Noise Concerns, Driveline/Steering Vibration/Shudder, Intermittent DTCs/MIL Illuminated, Engagement/Disengagement/Ratcheting Concerns.

Owners of these vehicles have filed 1,839 complaints in the electrical category.

Vehicles covered

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