1990 chevy 1500 overheating problems

ok one day was driving down the road for just a few mins and check gauges light came on and noticed my tempature gauge was ALL the way up....pulled over and noticed my resivor was overflowing and my radiator cap had fluid coming out of it....is this the result of a faulty radiator cap? it was running fine the day before no problems ...thermostat was just replaced ...system was just flushed.....had plenty of coolant but not overfilled

Welcome to AF, this is not a classic so I am moving this to the proper truck forum below.

Even new tstats can go bad. Need to pull it and see if it opens in boiling water.

The water pump could be bad, the radiator is clogged, or even a hose collapsed.

//2000CAYukon

nvm!! pulled water pump off and opened it...blades were completely gone just replaced and running fine!

them mexican t-stats out of the box new won't open in boiling water.if it says made in mexico on the box better leave it on the counter.