Valve seals on original/new engine seated improperly causing excessive oil use and engine misfire. Valve seals replaced by dealer per gmc notice socmp96c17. Two months later in january, 1997, valve seals #4 and #6 again failed with same symptoms but were replaced by dealer since failure took place within a year of original gmc notice. In 1999 same symptoms again showed up but when I took it to the dealer in june, 1999, they would not replace the seals because gmc said they were no longer covered. Gmc dealer had assured me in january, 1997, that seals would be covered as long as I owned the vehicle.
1996 GMC Sonoma engine complaints
Page 2 of 2: complaints 11 to 19 of 19, newest first, as owners wrote them.
When driving at 50 MPH and applying the brakes, brakes went straight to the floorboard. Also, pulley came off, causing the consumer to pull over. Vehicle accelerated, and the consumer had to pull over and shut the igintion switch off.
Vehicle continuously stalls.
Engine stalls, fails to restart, repairs have been made however vehicle continues to stalls.
Vehicle shuts off with no warning or fails to start and the problem has become chronic, cannot diagnose why this occurs.
Water pump failed.
Door hinge does not keep door open.
Oxygen sensor failed twice.
Engine races very slowly when accelerator is released and sometimes races between gear shifts.
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