Question about 2001 Chevrolet Silverado 1500

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Coolant leaking outside cab on firewall - 2001 Chevrolet Silverado 1500

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Hello and welcome. this would be a heater core leaking. the heater core sets inside the a/c box behind the dash. there is a drain tube that sets in the firewall. when the heater core leaks, it will drain out this drain tube

Posted on Sep 29, 2010

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Posted on Jan 02, 2017

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My 2010 Jeep Liberty is leaking water from the a/c on to the driver floor board


If you are leaking water and not coolant, your condensation drain on the outside on the firewall could be clogged. All you have to do is remove the dirt and run your vehicle with the A/C on and check that is begins to leak outside.

If it's coolant, then you may have a leaking heater hose or heater core. This requires to replace the leaking component, which may need to have the dash board removed.

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Heater core leaking into cab coolant smell outside is core bad plenty of heat though


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Disconnect heater hoses at firewall. Probably doesn't matter about hose placement, but I always mark them just in case. To remove the fiber cover under dash, take a flatblade screwdriver and pry out the center pin of the expansion clips that hold it in place. There are four 5/16 head screws that hold the bottom/drain tray cover. Core will pull through the firewall and then down. You may have to silicone/glue or replace the foam seal strips on the new core. Before you install the core, check the distance between the inlet and outlet tubes to ensure they match the openings in the firewall. This saves time. It helps if you have someone on the outside to guide you when stabbing the tubes through the firewall. Replace bottom cover. You may have to hold one of the tubes when reinstalling the first hose to the core. Replace any lost coolant and check for leaks prior to reinstalling the fiber cover. If the cover seal is in good condition, any leak should drain through the firewall, otherwise it may leak inside cab. These days with parts from mexico and others, it is not uncommon to get a new defective part.

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Smells like coolant in cab and leaking @ firewall


that means that the heater core is leaking

Jul 27, 2009 | 2001 Ford Expedition

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Heater core replacement


It's one of the easiest cores to replace that I have encountered. Disconnect heater hoses at firewall. Probably doesn't matter about hose placement, but I always mark them just in case. To remove the fiber cover under dash, take a flat blade screwdriver and pry out the center pin of the expansion clips that hold it in place. There are four 5/16 head screws that hold the bottom/drain tray cover. Core will pull through the firewall and then down. You may have to silicone/glue or replace the foam seal strips on the new core. Before you install the core, check the distance between the inlet and outlet tubes to ensure they match the openings in the firewall. This saves time. It helps if you have someone on the outside to guide you when stabbing the tubes through the firewall. Replace bottom cover. You may have to hold one of the tubes when reinstalling the first hose to the core. Replace any lost coolant and check for leaks prior to reinstalling the fiber cover. If the cover seal is in good condition, any leak should drain through the firewall, otherwise it may leak inside cab. .

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pipe going to the fire wall is usualy the cabin heater. for the time being there should be 2 hoses going to the fire wall coolant in/out. remove them from the pipe on the fire wall and blank them off or if the hose is split replace them. it could be the heater core but that usualy leaks into the cab.

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