| View Full Version : Block Drain Plug- Coolant 4.6L jimbo49 07-30-04, 11:45 PM On a 1997 Deville: I want to drain coolant per the book- at both the radiator and engine block. GM service manual on engine drawing describes the block drain plug as "non-functional". What's up? Is the plug just there for looks? Is his plug really "non-functional"? LacSeville 07-31-04, 11:35 AM yoiu might try posting this in the N* section! LCLCLC 08-01-04, 03:05 AM Someone earlier said the early Northstars had block drain plugs, but starting in year ????, they were eliminated. Anyone know on what year they 'have' seen a block drain plug? | |