Could be "Dex-Cool" engine coolant.
NO NO, That would be a intake gasket leaking, not a head gasket. You also should check where the heater hose hooks up on the intake, it may be leaking.
CFI ? The fuel pressure regulator could be leaking.
oil is thinner when its hot, that's why.
It is either leaking down the inside of your firewall under the dash (master cylinder) or leaking just enough inside the trasnmission bell housing to not puddle and be thrown around by the clutch spinning (slave cylinder).
Need more info. Would like to know where this hole is.
heater core???
If you mean "Why would the rear A/C be leaking water?" then the answer is condensation. There is a plastic catch pan under the rear A/C evaperator that all of the condensing water is supposed to be caught in then funneled out of the cab through a hose that runs inside the trim of the back pillar, to be dumped on the ground under the rear wheel. If there is a crack in the catch pan, or a clog in the hose, the result will be brackish water leaking into the interior. If you mean "Why would the rear A/C be leaking refrigerant" then the answer is a broken refrigerant line in the rear A/C unit.
Chevy pickups come in a variety of colors to choose from. It is up to your persona taste in which color you would pick. I personally prefer a black pick up truck.
BAD STARTER OR TIMING OFF LEAKING FLOATS
Heater core is leaking. Air Conditioner drain hose is plugged.
maybe your radiator is broken and you need to get a new one or just get a reparation if the radiator starts leaking when is in use it may be leaking because of the pressure of the water.
A 1974 Chevy Impala frame would work