I just submitted a question about leaking antifreeze. Maybe this will make it ea on 2005 Chevrolet Silverado 1500

sier for you to answer--"I smell antifreeze when I start the engine."

by in Houston, TX on June 15, 2013
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1 answer 9 comments
ANSWER by , June 15, 2013
Replace the water pump. I can see it leaking from here!
COMMENT by , June 16, 2013
the water pump will cause me to lose antifreeze?
COMMENT by , June 16, 2013
Yep, when it leaks it will, every time!!! Check radiator also. Look very close, hard to find at times..even under pressure test!!
COMMENT by , June 20, 2013
Like pushrod said, we can see the water pump leaking from here! GM 5.3L = Water Pump leak!
COMMENT by , June 20, 2013
Bypassed the Heater Core. No more leak.
COMMENT by , June 20, 2013
Ok. No more heat either but you wont need that for awhile!
COMMENT by , June 20, 2013
Nope not in Houston, TX! 104 yesterday.
COMMENT by , June 20, 2013
Crap! Ac ok? These 5.3 engines are just famous for mystery H20 leaks and most of the time it's the pump or rad. A little unusual for the core to leak. When you get it fixed use good old fashion antifreeze, not Dexcool.
COMMENT by , June 20, 2013
A\C blows artic cold. I was told I had to use Dexcool and not to change it. What's up with that?
COMMENT by , June 20, 2013
That is just a bunch of B.S.!! After working on these GM vehicles and seeing the effect of Dexcool, first thing i did, after warranty, on my Blazer is flush that crap out and replace it with the old green stuff. Google Dexcool, look around a bit and you will see, i think. Probably the reason your heater core is leaking!