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Refill block with coolant

Discussion in 'General Chevy & GM Tech Questions' started by Ba$$n, Apr 11, 2010.

  1. Ba$$n

    Ba$$n New Member

    I have a 2005 Tahoe with the 5.3 engine and would like to drain and refill the cooling system. The shop manual says it is necessary to disconnect an air bleed line between cylinder banks to allow air out of the block. That proceedure looks like asking for trouble. I'm just wondering if I could achieve the same thing by disconnecting the top radiator hose. The thermostat is not connected to the top hose so I think it should allow any air to bleed out as I refill from the coolant bottle.

    Comments ?
    Last edited: Apr 11, 2010
  2. wis bang

    wis bang Rockstar 100 Posts

    Try parking it on an upgrade, fill it and start it w/ the cap off. Let it run until the level drops & top it off. Rinse & repeat until all the air works out and it won't take any more coolant.

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