I have a 2008 LT2 with 170,000 miles. I have an intermittent problem. My temperature gauge won't work, coolant reads---,and no AC. The next day everything works fine. This has happened 4 times in the past six weeks. Any thoughts?

 

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Could be a loose fuse? Check it make sure they are all snug as a bug :)
Tim

 

I had this happen and I replaced both the thermostat and the sender since they are in the same area and either one can cause problems. I figured why not since they are pretty cheap and not having A/C is a pain!

 

Thanks, I'll try them all.

 

[QUOTE=oldracer;781653]I had this happen and I replaced both the thermostat and the sender since they are in the same area and either one can cause problems. I figured why not since they are pretty cheap and not having A/C is a pain![/QUOTE

Thank you. I'll check into that.

 

Thermostat - well known issue. Sometimes it will light up the CEL with a P0128 code , but not always.

 

Hey GibsonHHR,

Welcome to the forum! Looks like you've received some great advice already, but let us know in a PM if you'd like to have your HHR taken to a dealership. I can have your preferred one reach out to you for a diagnosis.

Let us know if that's something you'd like us to do. We're here to assist. Also, send us a PM when your HHR hits 200,000 miles!

Regards,

Geoff G.
Chevrolet Customer Care

 

T-stat. Had it happen many times.

 

Tutorial by Smoke Wagon on changing the thermostat and saving yourself a few $'s - https://www.chevyhhr.net/forums/how-...l-p0128-24493/

 

Thermostat, had the exact same problem. Luckily mine was under warranty so no $350.00 bill to go along with the fix.