TrailBlazer 2002-2009
The TrailBlazer, originally introduced as an upscale Blazer, was produced from 2002 to 2008 with a powerful I6 engine and with a monster V8 offered in the Trailblazer SS
Platform: GMT 305, 360, & 370.

Rear leak on Trailblazer Ext

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Old June 17th, 2007, 3:59 PM
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Default Rear leak on Trailblazer Ext

There is a coolant leak on the rear of my 2003 Trailblazer Ext. It appears to be coming out of a black valve on the passenger's side. Does anyone have a clue as to why this is happening? It just started when the temperatures started to get into the 90's.
Old March 7th, 2009, 1:25 PM
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I am experencing the same thing on our 2002 Trailblazer Ext LS. We have also had the rear A/C start to click on and off whenever the car is first started for about 3 mins. It sounds like the solenoid or relay is turning on and off. We are not able to ustilize the A/C anymore, it only blows hot air.
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