# 2017 GMC SIERRA 1500 — FUEL/PROPULSION SYSTEM
> NHTSA complaint `1786299` · 2022-01-03 · General Motors, LLC
## Severity
- **Deaths:** 0
- **Injured:** 0
- **Fire:** No
- **Crash:** Yes
- **Police report:** No
- **Medical attention:** No
- **Vehicle towed:** No
## Vehicle
- **Make:** GMC
- **Model:** SIERRA 1500
- **Year:** 2017
- **Manufacturer:** General Motors, LLC
- **Component:** FUEL/PROPULSION SYSTEM
- **Speed:** 7 mph
## Narrative
. THE ENGINE MOUNTED MECHANICAL VACUUM PUMP MAY DECREASE OVER TIME DECREASING THE AMOUNT OF VACUUM/ POWER BRAKE ASSIST, CAUSING VEHICLE NOT TO STOP. SAME AS MY 2016 GMC.  I HAD TO ALSO HAVE THE ( EVAP CONTROL VALVE REPLACED). TRANSMISSION SURGES AND ON THE DOWN SHIFT ITS KNOCKING COMING TYO A STOP. .IN MY REAR ENDING A PARKED VEHICLE BECAUSE OF THE BRAKES PULSATING AND NOT STOPING SCARED ME. .DEALERSHIP. .DEALERSHIP .NO
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*Source: [NHTSA ODI](https://www-odi.nhtsa.dot.gov/downloads/) · AI Analytics · CC0 1.0*