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GMC TSB #23-NA-185
2021 GMC Sierra 1500
TSB Document:
Affected Component: EQUIPMENT
- 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.
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