I wouldn't vandalize your truck however you are taking a chance that what you are doing could jeopardize the health of your dog and is just a stupid thing to do. In heat it is best to take the dog home and then go out of the gallon of milk later. If you truly care about your pet this is what you would do.

In 2003, a police dog in Tx died after the AC in the patrol car shut down and began blowing hot air. The air system's compressor kicked off because the engine got too hot. Many cars, including modern models with computerized functions, are prone to the same problem. In August 2004, a NC couple lost 2 of their beloved dogs, and nearly lost their 3rd dog as a result of a similar failure. They had left bowls of water and ice in the car, and the AC on, during their shopping trip of less than 30 minutes.

I got the above information from an article on a website at http://www.paw-rescue.org/paw/pettip...ip_Hotcars.php

I am going to court tomorrow afternoon here in State College as a witness because a woman left her dog in the car in order to eat dinner at Applebees. It was 80 degrees outside and the windows were only cracked about a 1/4 of an inch. There was water in the car but the schnauzer was in distress. I located her in the restaurant and explained to her why she had to go out and deal with her dog NOW. She refused so I called the police. They were there in 10 minutes and hauled her out of the restaurant to deal with the situation. They "arrested" her which is basically a summery offense or ticket. She pled (sp?)not guilty so I was subpeoned and I appear in court at 2:30 tomorrow afternoon. I can't wait. I hope she shows up since she had MD plates on the car.

So if you care about your pets at all you either leave them at home when it is over 65 degrees or have someone else with you to stay with the pet in the car while you get your milk. Or you risk the wrath of people who do care for your dog more than you do. Period. End of story. No if ands or buts about it.

If you would like some information about how the temp in a car ramps up in the heat check out this one from GM

http://ggweather.com/heat/