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April 14, 2021 Service bulletin

Special Coverage Adjustment

Buick technical service bulletin 18226-01 for 2008-2011 Buick Lucerne and 2009-2011 Cadillac DTS.

Bulletin number
18226-01
Component
Electrical system
Summary
Special Coverage Adjustment - certain vehicles the vehicle?s rear-seat bracketcould contact the vehicle?s Rear Electrical Center (REC), which can, over time, damage electrical components within the RECenclosure. If damage occurs, the components can melt or overheat, which the customer may detect by a melting odor in thevehicle. Damage could also cause the vehicle?s battery to drain,a no-start condition, or a stall. Dealers are to inspect and if repair is necessary, replace the rear electrical center (REC). Additional repairs to the fuelpump relay wiring may be required. In each case the rear seat bracket will need to be trimmed (Lucerne only). The repairswill be made at no charge to the customer.

Owners of these vehicles have filed 267 complaints in the electrical category.

Vehicles covered

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