One problem related to brake fluid leak has been reported for the 2009 Chevrolet Silverado. The most recently reported issues are listed below.
Extreme chattering of the rear brakes upon application was observed by the owner/driver, including lock-up of the rear wheels (even though abs equipped). The vehicle was taken to the autonation Chevrolet superstition springs dealership (6330 e. Superstition springs blvd, mesa, arizona 85206) for inspection and repair (selling dealer). The dealership informed the owner that both rear brake slave cylinders had failed and leaked hydraulic fluid onto the linings. This leakage had caused the sticking of the linings to the brake drums and resulting chattering/lockup of the brakes. Post repair, there have been no further issues in the last 3000 miles of use. The repair was at the expense of the customer. As this occurred at 36094 miles and four years of service in residential use, I consider this a product failure due to some form of manufacturing and/or installation defect with the brake slave cylinders. In 40+ years of automobile ownership of many brands with mileages into the 140k+ range, I have never had a slave cylinder failure, nor have I ever heard of a dual failure. This was the same comment by the service technician at the dealer. Please investigate, or at a minimum, add this to your watch list database. I reviewed the nshta's website list of defects, but found nothing regarding this type of incident. The fact that it was a dual component failure and could have resulted in an accident if hard braking had been required by the operator, the manufacturer should be made aware of the issue. I attempted to do so personally, but found the experience unsatisfactory.