Five problems related to brake electric antilock have been reported for the 2004 GMC Sierra. The most recently reported issues are listed below.
I am experiencing the exact problem that is described regarding the recall of GMC light trucks for abs activation at slow speeds due to corrosion of the hub and wheel assembly. I have a 2004 GMC Sierra denali which, according to GMC, is not included in the massive recall prompted by your investigation. My issue, as described by the dealer, is exactly the same as the issue and reason for recalling those other vehicles.
The contact stated while applying the brakes it was difficult to stop the vehicle. The vehicle slid before it came to a complete stop. There was extended stopping distances when trying to stop the vehicle. The dealer could not duplicate the problem with the brakes.
Contact states the brakes have a very soft pedal. It doesn't seem that the anti- lock brake system is working. To make the vehicle stop the pedal has to be pressed all the way to the floor. The service dealer states this is a characteristic of the vehicle. The weather conditions have no influence on the braking capability of the vehicle. The consumer has contacted the manufacturer.
Dt: while driving and approaching a stop sign, consumer hit the brakes and the abs activated as if there were no brakes. Consumer had to let off again and push brakes again to stop. By that time vehicle had rolled out in the road past the stop sign. This was the second time something like this had happened. No repair work performed. Probably was under 10 mph when abs activated.
The consumer stated that the 2004 GMC Sierra was having problems with the brakes. The vehicle had no stopping power. The consumer informed gm about this problem a year ago and they have worked on this problem several times trying to fix the brakes. However, the problem recurred. Today the consumer was waiting on gm to get back in contact with his dealership. The consumer talked to the dealership last week and they still had not heard from gm. The hold up on the consumer getting the brakes fixed was gm doing the work under warranty. Speed was not a factor in the braking power. The consumer stated gm did contacted him and they decided they were not going to do anything more to fix the brake problem.