I bought a used Chevy Silverado (5.3) almost a year ago, just after the great Harvey flood. It had 145K miles at that time. I checked the vehicle over pretty good when I bought it, and I remember seeing nice red Trans fluid on the dipstick then. I have since driven about 15,000 miles, and I checked the fluid again this week and found the fluid level almost 2 inches above the crosshatch mark. I don't know how I missed the overfill earlier, but I suppose I did. I took it to an independent shop and they did a BG flush, and the fluid is now new, and at the correct level. The truck has never exhibited any trans symptoms. Shifts have always been correct. The fluid was still red at the time of change. My question is, all things considered, how much damage (if any) was done? Should I worry much? Thanks.