# 2003 Chevrolet Express 3500 antifreeze leaks only in cold temps

**URL:** <https://community.cartalk.com/t/2003-chevrolet-express-3500-antifreeze-leaks-only-in-cold-temps/135749>\
**Category:** Maintenance/Repairs\
**Tags:** chevrolet, express3500\
**Created:** [March 4, 2019, 12:58pm UTC](https://community.cartalk.com/t/2003-chevrolet-express-3500-antifreeze-leaks-only-in-cold-temps/135749 "2019-03-04T12:58:06Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![Robert05](https://avatars.discourse-cdn.com/v4/letter/r/5fc32e/32.png) [@Robert05](https://community.cartalk.com/u/Robert05)\
**Post date:** [March 4, 2019, 12:58pm UTC](https://community.cartalk.com/t/2003-chevrolet-express-3500-antifreeze-leaks-only-in-cold-temps/135749/1 "2019-03-04T12:58:07Z")

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Why does the anti freeze leak only in severe cold weather over night.

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**Author:** ![Purebred](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/purebred/32/46796_2.png) [@Purebred](https://community.cartalk.com/u/Purebred)\
**Post date:** [March 4, 2019, 2:21pm UTC](https://community.cartalk.com/t/2003-chevrolet-express-3500-antifreeze-leaks-only-in-cold-temps/135749/2 "2019-03-04T14:21:04Z")

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My guess is due to metal contraction in the cold. You may have a bad gasket on a metal to metal fitting, might be a solder joint. Have the system pressure tested before complete failure.

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**Author:** ![eddo](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/eddo/32/2594_2.png) [@eddo](https://community.cartalk.com/u/eddo)\
**Post date:** [March 4, 2019, 6:40pm UTC](https://community.cartalk.com/t/2003-chevrolet-express-3500-antifreeze-leaks-only-in-cold-temps/135749/3 "2019-03-04T18:40:00Z")

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Where is it leaking from?