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G3GM 1973 to 1977 A-bodys. Chevelles, Monte Carlos, El Caminos, Laguna, 442, Cutlass, Malibu, GTO, LeMans, Century, Regal, Grand Am, Grand Prix, Sprint, Gran Sport, Can Am, Hurst-olds, and other 73-77 A-bodies
Can someone confirm whether or not it's necessary to drain the coolant when replacing the Gauge/Warning Light Coolant Temp Sensor that's located between cylinders #1 and #3 below the exhaust manifold? Or, will just a little coolant seep out if it's not drained?