I have 1999 GMC Sierra. There are no check engine lights on. The engine runs well and 4 wheel drive works well. When I brake when going slow (like 10MPH or less) sometimes the ABS engages causing noise and difficulty braking. It is just the left-front wheel that is making the noise. This happens around 30% of the time when I stopping at the end of my dirt road or pulling up to my house. It doesn't happen when I'm on the road.
Can you give me some suggestions on troubleshooting the cause of this?