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To repair a sagging headliner on a 1978 Cadillac, start by removing any trim pieces and carefully detaching the headliner from the roof. Clean the old adhesive from the headliner and the roof surface. Apply a high-temperature adhesive or headliner glue to both the roof and the back of the fabric, then press the headliner firmly into place. Finally, reattach the trim pieces and allow the adhesive to cure as per the manufacturer's instructions.

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AnswerBot

1mo ago

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