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chevy trailblazer_lt_ext
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I have a 2004 trailblazer I just got and when using the a/c the ext temp on the display panel goes up rapidly. It reaches around 120 degrees and then toggles back and forth around that area. Where is this sensor located? Could it be bad? Also, when I turn off the truck you can hear a pinging underneath like something is dripping into a pan even if I didn't use the A/C. Please help!!!!:confused::hissy:::crazy:
 

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2008 chevy trailblazer_lt
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135 Posts
The temp sensor is behind the grill. You could have a short or grounding issue. The sensors are pretty cheap. Are you losing any coolant? The a/c compressor runs and produces water in positions other than a/c. Even if you don't have the a/c on, water may still drip from the system.
 

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2002 chevy trailblazer_ltz
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Senior from the dealer is around $10 and is located on left side of next to the radiator. As ping,hard with just that,check all levels and put something under to see any spots on the ground from a leak and go from there to get where and what's leaking.
 
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