Four problems related to brake antilock control unit/module have been reported for the 1999 GMC Sierra 1500. The most recently reported issues are listed below.
The contact owns a 1999 GMC Sierra 1500. While attempting to stop the vehicle at a low rate of speed, the abs engaged and the vehicle could not be stopped until the brakes were disengaged, engaged, and pumped. On September 4, 2003, at 46,663 miles, the failure occurred, but only one sensor was replaced at that time. On September 20, 2004, at 54,318 miles, the failure recurred and a second sensor was replaced. A recall was issued and the vehicle was repaired accordingly on February 21, 2006, in which both sensors were replaced at 58,869 miles. On March 3, 2006, the contact retrieved the vehicle, but it had been crashed into the wall. The mechanic replaced the front passenger side hub, which was claimed to have caused the crash. The front end of the vehicle was poorly repaired. In March of 2008, the abs failure recurred and the contact took the vehicle to be repaired again, but was informed that it was no longer under warranty. The contact disconnected the abs. The current mileage was 95,500 and the failure mileage was unknown.
: the contact stated while backing the vehicle out of a parking space, a humming noise was heard. While driving the vehicle 50 mph, the noise continued. The contact determined the humming noise was the brake module pump running and disconnected the pump until the vehicle could be taken to the dealership. After the engine was turned off, the humming noise continued. The dealership confirmed the humming noise was coming from the brake control module and there was either a faulty electronic computer relay in the brake module or in the valve body of the brake module. Updated 10/18/2006 - the consumer is concerned that the brakes may fail.
On my 2001 GMC sierra truck the warning lights came on for the abs and the parking brake I took it to the mechanic and was told the ebcm (electronic brake control modul) needs replaced. I spoke with the mechanic and he pointed out that there is a lot of these being replaced on this year of vehicle.
The computer that controlled the abs failed and as a result the system did not function properly.