Radiator flush

Tiny
JACLARK1
  • 2002 GMC SONOMA
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 72,349 MILES

I have a 2002 GMC sonoma pickup and I want to drain the radiator and put in new coolant, How do I open the drain valve 'i have never seen a valve like this one? It looks like nothing I have ever seen?

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Monday, April 18th, 2011 AT 9:48 PM

4 Replies

Tiny
RASMATAZ
  • MEMBER

Unable to open the valve -disconnect the bottom hose to drain it

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Monday, April 18th, 2011 AT 9:50 PM
Tiny
JACLARK1
  • MEMBER

The bottom hose is about halfway up the rad?

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Monday, April 18th, 2011 AT 9:58 PM
Tiny
JACLARK1
  • MEMBER

I tried to siphone the antifreeze out but the rad. Has a trans. Cooling jacket in the way inside the rad?

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Monday, April 18th, 2011 AT 10:05 PM
Tiny
MHPAUTOS
  • EXPERT
  • 30,875 POSTS

Take the thermostat out and the bottom hose off and also disconnect the heater hose, flush all out with water until it runs clean, replace hose etc add 6.5 litres of DEX-COOL and remainder with water this will give you the 50/50 coolant mix required.

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Sunday, July 17th, 2011 AT 9:12 AM

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