GMC Yukon XL Denali Problem Report

GMC Yukon XL Denali Check Engine Light Due to Gas Cap Issue

(11 reports)

Illumination of the Check Engine Light can be caused by a loose or worn gas cap.

This has happened twice that the check engine light came on with the message of tighten gas cap -
Check engine comes on. A bottle STP gas treatment or dry gas fixes it. -
Check engine light due to gas cap issue. -
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