Engine-Codes - Gmc - P1172 GMC

P1172 GMC - Fuel Pump Insufficient Flow

Repair Importance Level: 3/3
Repair Difficulty Level: 2/3  What is this?
Table of contents

P1172 GMC Possible Causes

  • Faulty Fuel Pump
  • Fuel Pump harness is open or shorted
  • Fuel Pump circuit poor electrical connection

How is the P1172 GMC code repair?

Start by checking the "Possible Causes" listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector's pins.

Tech Notes

There is a factory service bulletin for the following GMC Models:
2001 GMC Sierra
2002 GMC Sierra
2003 GMC Sierra
2004 GMC Sierra
2005 GMC Sierra
2001-2005 GMC Sierra Factory Service Bulletin OBDII Code P1172

What is the cost to diagnose the P1172 GMC code

Labor: 1.0

The cost to diagnose the P1172 GMC code is 1.0 hour of labor. The auto repair's diagnosis time and labor rates vary by location, vehicle's make and model, and even your engine type. Most auto repair shops charge between $75 and $150 per hour.
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Possible Symptoms

  • Engine Light ON (or Service Engine Soon Warning Light)

P1172 GMC Meaning

The fuel pump is located on the left frame rail between the fuel tanks. The Engine Control Module (ECM) provides ignition positive voltage to the coil side of the fuel pump relay. The ECM energizes the fuel pump relay, which applies power to the fuel pump. Fuel is transferred from the rear fuel tank to the front fuel tank in order to ensure all of the usable fuel volume is available to the engine. This Diagnostic Trouble Code (DTC) sets when the ECM commands the transfer fuel pump ON and a predetermined change in the front and rear fuel level sensors does not occur.

More Information

Need more information on how to fix the P1172 GMC code?
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