Grinding / Growling / Rubbing Noise

chevrolet
colorado

#1

I live a hundred feet above sea level. When I drive 100 miles to the cabin at 6,000 feet, I hear a grinding noise when I slow to 15 MPH. After a short period of cooling (not driving) the noise is gone. While at this elevation, I do not hear the noise again while driving, or on the way home. It does not occur at lower elevations and I have never heard it anywhere else. Any ideas will be welcome.



Gary


#2

Where does the noise appear to be coming from? Under the truck? Under the hood? Front, rear, left, right?

Any clues at all?


#3

Thanks for the reply. My hearing is not what it used to be, but the noise seems more towards the front of the vehicle. At its worst, I can feel a slight vibration too. I am thinking that the issue might be heat related. The trip requires driving mostly uphill at 50/55 MPH through some fairly tight turns. After the truck sits for awhile, there is no more sound and it does not occur again until the next trip to the mountains.