[CrateEngineDepot]

GM had these valves on back order but I just got a huge order of them in.
If you are looking for them or know someone who is. you can order them here by clicking this link

Service Bulletin
10-06-02-001 S 01Feb2010 6
Subject:
ENGINE OVER HEAT/POOR HEATER PERFORMANCE (INSTALL TWO VALVES IN COOLING SYSTEM)
Models:
2007-2009 PONTIAC SOLSTICE GXP 2007-2009 SATURN SKY REDLINE 2007-2009 OPEL GT 2007-2009 DAWWOO G2X ALL EQUIPPED WITH RPO LNF


Click here to download Service Bulletin

 

[TomatoSoup]

Tom, the title is misleading... I think these are the coolant 'check valves' per the TSB #10-06-02-001, right? http://www.crateenginedepot.com/pdfs/20876185.pdf

 

[CrateEngineDepot]

Official description on the parts side: VALVE ASM-ENGINE COOL AIR BLEEDER.
I did update and link the Service Bulletin.