 What do you need to know about Grand Valley Auto? They simply do it better. Better selection, better prices, and above all, Grand Valley Auto will give you a better experience. Grand Valley Auto, 2465 Highway 6 and 15, Grand Junction. 1100 KNZZ, dependable weather. Tuesday, partly cloudy. There is a chance of a shower and a thunderstorm in the afternoon, 97, then down to 67. Hot on Wednesday, 99 in the valley. Then on Thursday, partly cloudy. Chance of those showers again, 98 and 69.