Manufacturer communication — 2006 GMC YUKON DENALI XL

Fitment confirmedReporter type: ManufacturerFUEL SYSTEM, OTHER

Relation to the target vehicle

The source's vehicle field includes the trim.

Model year: Match 2006 — Source vehicle field
Model: Match YUKON DENALI XL — Source vehicle field
Trim: Match Denali — Source vehicle field

What the manufacturer’s document says

05-06-04-035E ・ information ・ names this vehicle

Applies to

The list of compatible flexible-fuel vehicles includes 2002–2005 fullsize pickups and utilities with 5.3L, RPO L59.
the passage
2002–2005 Fullsize Pickups and Utilities with 5.3L — RPO L59
The list of compatible flexible-fuel vehicles includes 2006 Sierra, Yukon and Yukon XL with 5.3L, RPO L59.
the passage
2006 Sierra, Yukon, Yukon XL with 5.3L — RPO L59

Fault

Using this fuel in a non-compatible vehicle may cause lean driveability concerns such as hesitation, sag and/or possible stalling.
the passage
Lean driveability concerns such as hesitation, sag and/or possible stalling.
Fuel trim DTC P0171 and/or P0174 may set.
the passage
Fuel Trim DTC P0171 and/or P0174 may set.
Misfire DTC P0300 may set.
the passage
Misfire DTC P0300 may set.
Harsh and/or firm transmission shifts may occur because the transmission defaults to maximum line pressure.
the passage
Harsh and/or firm transmission shifts due to the transmission defaulting to maximum line pressure.

Finding the cause

Steps to confirm (in the document’s order)

Alcohol content is checked using Special Tool J-44175-A Fuel Composition Tester or CH-44175-A Fuel Composition Tester.
the passage
be checked for alcohol content using Special Tool J-44175-A Fuel Composition Tester, or CH-44175-A Fuel Composition Tester.
General Motors started putting yellow gas caps on E85 FlexFuel Vehicles (FFVs) as of Model Year 2006.
the passage
General Motors started putting yellow gas caps on E85 FlexFuel Vehicles (FFVs) as of Model Year 2006.

Correction

Repair

If the ethanol content exceeds the Owner Manual maximum of 10% or 15%, drain the fuel and refill the vehicle with gasoline, preferably a Top Tier brand.
the passage
If the ethanol content exceeds the Owner Manual indicated maximum of 10% or 15%, the fuel should be drained and the vehicle refilled with gasoline, preferably one of the Top Tier brands.

Caution

All General Motors Model Year 2011 and older non-FFV gasoline vehicles are designed to run on fuel containing no more than 10% ethanol.
the passage
All General Motors Model Year 2011 and older non-FFV gasoline vehicles are designed to run on fuel that contains no more than 10% ethanol.

What is needed

Parts and materials: Not stated
Labor time: Not stated
Special tools: J-44175-A or CH-44175-A Fuel Composition Tester (to check the alcohol content of the fuel in the tank when a non-E85 vehicle is suspected to have been fueled with E85)
Scan tool: Not stated

Only what the technical documents state. "Not stated" does not mean not needed.

Compiled by reading the full text of the document; each point stands on the passage shown. Check the document itself, linked below, before working on a vehicle.

Stated content

Communication summary
本情報通知は、販売店担当者に対してGM車のフレキシブル燃料車（FFV）及びE85燃料の使用に関する情報を提供するものである。 Machine translation (unreviewed)
This informational bulletin provides dealership personnel with information on flexible fuel vehicles (FFVs) and the usage of E85 fuel in GM vehicles.
Go to this passage in the original

Source

Source: NHTSA Manufacturer Communications
Source reference: 10113662
Received by source: 2017-08-15
Incident date: Unknown

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