# P0174 on the 2005 GMC Sierra

The bulletins listed name this code in NHTSA's summary, or are about the same components. A bulletin or a recall listed here may apply to the model year. None of it is a diagnosis.

Nobody has written a description of this code yet.

## Bulletins for this model year that name P0174

- [10015784](https://open.wenmarpro.com/bulletins/10015784), 2005-08-12: SERVICE ENGINE SOON LIGHT ILLUMINATED. DIAGNOSTIC TROUBLE CODE \(DTC\) P0171 AND/OR P0174 \(LEAN FUEL TRIM\) MAY BE SET. MASTER CYLINDER O\-RING DAMAGED. GM TECH LINK. \*TT
- [10014870](https://open.wenmarpro.com/bulletins/10014870), 2005-05-11: 1999 \- 2005 GEN II COLD ENGINE MISFIRE AT IDLE WITH POSSIBLE P0171 AND/OR P0174. \*TT
- [10011595](https://open.wenmarpro.com/bulletins/10011595), 2005-01-27: SERVICE ENGINE SOON LIGHT ILLUMINATED WITH DIAGNOSTIC TROUBLE CODE P0171 OR P0174 SET. THE ROOT CAUSE MAY BE A DAMAGED OR MISSING SEAL FROM THE MASTER CYLINDER TO THE BRAKE BOOSTER. \*EH