Hi guys,

What is the best type of antifreeze to use in the aluminium HT4100's? Is there a special type you need to use or will any coolant due?

Thanks for the help.

Brian

Any green silicated coolant should do just fine. The important thing is to add the GM coolant suppliment pellets or Barsleaks product HDC or the powdered version G12BP.

Check this thread;
http://www.cadillacforums.com/forums/showthread.php?t=53771