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Compliance!
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5,151 Posts
Discussion Starter · #1 ·
been flushing my cooling/heating system out all week by flushing and draining everyday, water comes out clear but still some sediment in the radiator from my eyes, any ideas on safe cleaners that anyone has experienced using to help with removing this gunk in the radiator AND heater core? i think i read somewhere someone used dawn or something but idk if that too harsh or what not. TIA
 

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"factory freak"...
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8,604 Posts
use the GM cooling system cleaner, part # 88861344
about 8-9 bucks from your local GM dealer.
this stuff works really well...

flush the system more afterwards than the instructions say to.
 

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goin broke but n style
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12,942 Posts
i used the prestone stuff to get the 2 gallons of stop leak the prev owner put in the cooling system on my 99 blazer. i installed as per direction, let it sit overnite, drained the coolant next morning, flushed about 20 times with regular water. now radiator is cleaner than new and i had great heat, until the fuel pump took a crap.
 

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Compliance!
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5,151 Posts
Discussion Starter · #4 ·
yea ive been using the prestone crap, doing okay i suppose, just gotta keep flushing it. im gonna get that gm stuff then, thanks
 
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