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Discussion Starter · #1 · (Edited)
I have a 07 g6 gtp 3.6. It started not cranking only when baking in the sun for a while. I took ecu, bcm and put them in freezer still no luck. I took apart the fuse block under the hood and used a tungsten carbide dremel to grind the flare of the flared connector nuts.

When I opened it I was presented with bare copper crimped to every terminal. Instead of checking each one, I soldered at the base of each one. I put it back together and now it seems to work. Incase anyone has this issue, that is what solved my problem.

I hope this will help someone else.
 

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Discussion Starter · #2 ·
Okay I'm back with and update,

The problem started to happen again, long story short. I pulled the fuse block back out. This time looks with a microscope following the "start/crank relay" circuit. Then i found the crack in the copper. Its too small to see with your eyes but here is it location.
 

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