SXL34693 Aux. A/C Line Set. 2015-2020 GMC Yukon XL / Yukon Denali XL / Suburban Rear A/C Line Set. Our rear/auxiliary air conditioning lines for the 2015-2020 GMC Yukon XL, Yukon Denali XL, and Suburban are better than and less expensive alternative to replacing the factory aluminum lines.
