My '85 has had this gas gauge problem for several years. Behind the instrument cluster is a "metallic ribbon" connected to the gauges. The "ribbon" has pulled away from the gas gauge. I don't know what chevy used to connect the "ribbon" to the gauges, but the heat in AZ has killed it. I can reach up and push the "ribbon" to the gas gauge and it apparently works fine. However, when I let go the gauge becomes inop. Any experiences or ideas from the assembled masses? Thanks!