Never transport any dog in an open pick-up truck. Hundreds of injuries and fatalities occur due to this unsafe practice. If a truck is the only method of transportation place the dog in a secured airline approved crate in the truck bed. Don't leave your dog in a car.
Temperatures rise quickly and dogs are subject to heatstroke and death just like people.
Don't shave your dog's coat off in the summer. It provides insulation from the heat and prevents sunburn that can lead to skin cancer. Always keep your dog brushed and in proper coat. Never allow your dog to run loose. Keep them in a yard or kennel run with 6 foot fencing.