Q: When weather gets hot, SUV randomly won't start

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My SUV will randomly not start when the weather gets warmer. All of the following shut off: brake light, ABS light, security light, and radio. After waiting for 20-30 minutes, then my SUV will start. I have replaced the following: fuse block, ECM Module & reprogram, switch key Vincut key, BCM module (twice), mass air flow sensor. Plus, reprogrammed the security system (twice), greased the ground wires, and grease on terminals fuse block. I’ve been to the dealership and to two mechanic shops and have spent a lot! My car has not been fixed yet! What is your diagnosis and can you suggest what is causing the problem?

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