Has anyone done a coolant flush on their ls1. If so what is the process, can i do the work or should i just pay the $70 to have it done.

 

I hear to do a fuul coolant flush you have to remove the engine plugs or knock sensors to drain the plug. Is this true?

 

No. Drain and fill. Use Dex-Cool. No problem. Just fill it, and start it up. After the thermostat opens, make sure it is fill, and then put the radiator cap on. Let it run for a while, and the shut it off. Keep checking it for a day or 2. That's it.

 

There is a good description at
www.installuniversity.com
I used their method with no problems when I was installing my t-stat.