One problem related to headlights has been reported for the 1997 Chevrolet Tahoe. The most recently reported issues are listed below.
Near miss with deer due to headlight lens obscurity: - while driving down fm 2252, I almost struck a dog that was walking toward the road - the plastic headlight cover has become fogged and nearly opaque, leading to obscured visibility and greatly decreased the distance the light carries - new headlight lenses (~$240 a piece) were obtained.