The reason why Gl8 Buick GL8 hot air does not come out of the rear air outlet is 1, and the valve of the rear air outlet fails to open smoothly. 2. The air duct design is unreasonable. 3. The pipeline is damaged, and the air duct of the automobile air conditioner is all plastic parts. After a certain period of time, it will age, damage or interfere with other parts, so it should be checked and replaced in 4s shop or repair shop. 4. If the pipeline or air conditioning filter is blocked, remove the pipeline and clean up the sundries. Buick GL8 adopts 3.0LV6 intelligent direct injection engine, 2.4LEcotec engine and six-speed automatic manual transmission, and is equipped with OnStar OnStar full-time online assistant.