Two problems related to body have been reported for the 1999 GMC Sierra. The most recently reported issues are listed below.
The contact owns a 1999 GMC Sierra. The contact stated that while having the vehicle inspected by an independent repair shop, he was informed that all of the brake lines were rusted and corroded. The brake lines were replaced by the repair shop. Approximately two years later, the vehicle was again being examined by an independent repair shop and the contact was informed that the frame was cracked due to corrosion. The vehicle was not repaired. The manufacturer was made aware of the failure and the contact was awaiting a response. The failure mileage was 100,000.
There is a pop/squeak in front over bumps. Replaced front coil springs. Also, driver's seat sits too far/replaced right air deflector.