First, you need to remove the tire and wheel, next inflate the tire to the manufactures specified pressure as stated on the tire, and submerge the tire/wheel into a water bath in order to locate the leak, inscribe a mark on the wheel in order to indicate the leak areas, and inscribe a mark on the tire at the valve stem in order to Indicate the orientation of the tire to the wheel, then remove the tire from the wheel, scuff the inside of the rim surface at the leak area, and clean the leak area, and apply 3 mm (0.12 inch) thick layer of adhesive/sealant, GM P/N 12378478 (Canadian P/N 88900041) or equivalent, to the leak area, then allow for the adhesive/sealant to dry, align the inscribed mark on the tire with the valve stem on the wheel, and install the tire to the wheel, then inflate the tire to the manufactures specified pressure as stated on the tire, then submerge the tire/wheel into a water bath in order ensure the leak is sealed, balance the tire and wheel, and install the tire and wheel, ultimately lower the vehicle.
By BobGM Specialist
28/10/2022