Cadillac STS Problem Report

Cadillac STS Check Engine Light Due to Loose or Worn Gas Cap

(8 reports)

A loose or worn gas cap could be cause the Check Engine Light to illuminate.

STS V8, "check engine light" comes on occasionally, dealer states no trouble codes are evident, has no idea how to repair, GM will give no assistance, after creating a complaint file on it. -
Last seven months the check enine light keeps coming on. dealer shows no interest in repair or trouble shooting. -
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