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.

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Old June 17th, 2019, 5:18 PM
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Originally Posted by Harley75
Inside temp 68.5 might have.a clog
You need a high pressure gauge set on it
Old June 17th, 2019, 5:35 PM
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High pressure is 150psi
Old June 17th, 2019, 10:37 PM
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Originally Posted by Harley75
High pressure is 150psi
Thats a bit on the low side at 80F ambient temps. At 80 F high side should be 170 PSI or more. Might want to add a bit more R-134A. You can buy a cheap thermometer that you stick in the dash outlet vent. If its more then 45 degrees F, its not putting out enough cold air for some reason. Should be no more then 42F, and 40 to 38 F is optimal output.
Old June 18th, 2019, 5:48 AM
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Originally Posted by oilcanhenry
Thats a bit on the low side at 80F ambient temps. At 80 F high side should be 170 PSI or more. Might want to add a bit more R-134A. You can buy a cheap thermometer that you stick in the dash outlet vent. If its more then 45 degrees F, its not putting out enough cold air for some reason. Should be no more then 42F, and 40 to 38 F is optimal output.
I want.to.get.it.sucked out and check orifice tube




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