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GMC TSB #18338
2019 GMC Sierra 1500
TSB Document:
Affected Component: EQUIPMENT:APPLIANCE:AIR CONDITIONER
- Summary
- 18338 - Service Update. Certain vehicles may have a linkage to the HVAC front defrost door that is not fully seated and it may disconnect over time. Inspect the defrost linkage and repair if the linkage is not fully seated.
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