It's not a good idea. Lose of antifreeze can cause engine over heat causing all kinds of damage . The nice thing is that Chevys motors the frost plug is a fairly easy job.
1) block and raise front of truck.
Let motor cool
2) drain anti-freeze, remove bottom hose.
3) remove old frost plug careful not to let old frost plug drop back inside.
4) do everything in reverse order.
5) good time to inspect replace any bad hoses and install a new thermostat , and heater hoses.
6) flush system and add new 50 /50 antifreeze
7) run motor with radiater cap off and heater set to high. This step is to remove any air cought in the system. Don't panic if you for the first time don't remove all the air trapped inside just do this final step all over again.
8) check for leaks.
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