GMC Yukon 2000–2006

▸EQUIPMENT1

1. Manufacturer communication2000–2006 GMC YUKON DENALI ・ 2021-04-19(1 earlier editions of this document folded here)

   Winter Fuel Grade Use in Warm Months 2020 – Drivability Issues

   1. 1Fault

      • Fuel smell
      • Loss of engine power, no acceleration
      • Stalls or shuts off
      • Warning light
      • P0300
      • P0171
      • P0174
      • P228C
      • In rare instances customers may complain of a fuel smell, longer starts, hesitation and, in extreme cases, engine stalls.
      • Any combination of DTCs P0300, P0171, P0174 and P228C may be set.
      ↓→

   2. 2Finding the cause

      Possible causes

      • Using winter fuel in summer weather may cause drivability concerns.

      Steps to confirm (in the document’s order)

      • The concern should not be a single event but multiple occurrences associated with hot days.
      ↓→

   3. 3Correction

      Caution

      • No repair is required; the vehicles are not damaged and will recover.
      • There is no other remedy until summer fuel and/or cooler weather is available.
   Read the sentences of the record

   From the manufacturer’s document

   • Applies to：Applies to all brands and models with gasoline engines, model years 2000 - 2022.
   • Applies to：The involved region is North America.
   • Condition：In rare instances customers may complain of a fuel smell, longer starts, hesitation and, in extreme cases, engine stalls.
   • Condition：Any combination of DTCs P0300, P0171, P0174 and P228C may be set.
   • Cause：Using winter fuel in summer weather may cause drivability concerns.
   • Confirm：The concern should not be a single event but multiple occurrences associated with hot days.
   • Caution：No repair is required; the vehicles are not damaged and will recover.
   • Caution：There is no other remedy until summer fuel and/or cooler weather is available.

   Open the manufacturer’s document (PDF) ↗ The points above were read from this document.

   Remedy

   This Preliminary information communicates the use of Winter grade fuel during the warm months of 2020 and the potential rivability issues that it can cause. The ongoing Coronavirus (COVID-19) pandemic has caused significant reductions in driving and fuel use.  Due to the surplus of winter grade fuel sitting in storage (pipelines/stations) the EPA is waiving the fuel vapor requirement.  This will extend the use of winter fuel into the summer months. The drivability concerns should not be single events but should be multiple occurrences associated with hot days.