Hi peeps, so I’m about to turbo my 98 blazer but I need to remove the coolant reservoir and get an overflow tank but I don’t know how many liters the stock reservoir holds when its all warmed up and up to temp and I need to know this answer so I know what size overflow tank to get I can’t find anything on the internet about it. So I came here hoping someone has an answer. So if you do know please let me know.

 

You are in luck. For my 99 I measured the volume of my overflow tank.

To the "Add" mark, it takes 0.50 quarts. To the "Full" mark, takes an additional 1.0 quarts.

Hope this helps.