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Cadillac TSB #18049
2018 Cadillac XTS
TSB Document:
Affected Component: ELECTRICAL SYSTEM
- Summary
- 18049 - Service Update. Certain vehicles may have a multi-use relay assembly that is not fully seated in the underhood buss electrical center. This can cause an intermittent loss of tail lamps. Dealers are to remove, inspect, and if necessary, replace the multi-use relay assembly (tail lamp/park lamp).
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