One problem related to car stall has been reported for the 2003 GMC Sierra. The most recently reported issues are listed below.
The contact complained about many defects with this vehicle. The speedometer continually had an inaccurate read out while driving. The dealership believed this failure could be related to the wiring harness. Since they were unable to duplicate the problem no repairs were done. Also, the vehicle stalled at various speeds without warning. While the stalling occurred the contact pressed hard on the brakes to elevate the stalling. He believed this was due to the power brakes. The vehicle stalled on occasion and would not immediately restart. The dealership made numerous attempts to correct this problem w and all attempts have been unsuccessful. This included replacing the fuel pump and electrical control module.