Manufacturer communication — 2006 GMC YUKON DENALI XL

Fitment confirmedReporter type: ManufacturerELECTRICAL SYSTEM

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

07-06-03-009C ・ normal characteristic (no repair) ・ names this vehicle

Applies to

The model list names 2005-2013 GMC Sierra, Sierra Classic and Yukon models.
the passage
2005-2013 GMC Sierra, Sierra Classic, Yukon Models

Fault

Customers may comment that the voltmeter is fluctuating between 12 and 14 volts.
the passage
Some customers may comment that the voltmeter is fluctuating between 12 and 14 volts on their full size pickup or utility vehicle.
When towing or hauling a camper/trailer, customers may comment that the auxiliary battery for the camper/trailer will not stay charged.
the passage
Some customers may comment that when towing or hauling a camper/trailer, the auxiliary battery for the camper/trailer will not stay charged.

Finding the cause

Possible causes

Starting with the 2005 model year, light duty full size pickups and utilities have a Regulated Voltage Control (RVC) system.
the passage
Starting with the 2005 model year, light duty full size pickups and utilities are equipped with a Regulated Voltage Control (RVC) system.
The RVC system reduces the targeted generator output to 12.6–13.1 volts in "Fuel Economy Mode" to improve fuel economy.
the passage
This system reduces the targeted output of the generator to 12.6–13.1 volts when in “Fuel Economy Mode” to improve fuel economy.

Correction

Repair

With the tow/haul feature enabled, the RVC system stays in "Charge Mode" and the targeted generator output voltage is 13.9–15.5 volts, depending on battery state of charge and estimated battery temperature.
the passage
With the tow/haul feature enabled, the RVC system will stay in “Charge Mode” and the targeted generator output voltage will be 13.9–15.5 volts, depending on the battery state of charge and the estimated battery temperature.
The second method is to turn on the headlights, which increases the generator's targeted output voltage to 13.9–14.5 volts.
the passage
The second method is to turn on the headlights, which will increase the generator's targeted output voltage to 13.9–14.5 volts.

Caution

This fluctuation with the RVC system is normal system operation and no repairs should be attempted.
the passage
This fluctuation with the RVC system is normal system operation and NO repairs should be attempted.

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、調整式電圧制御システムによる電圧計計器の変動およびキャンパー/トレーラー用バッテリー充電に関する懸念について、2011～2014年モデルの情報を追加するものである。 Machine translation (unreviewed)
This informational bulletin adds 2011 - 2014 model years to information on voltmeter gauge fluctuation due to regulated voltage control system and concerns about camper/trailer battery charging.
Go to this passage in the original

Source

Source: NHTSA Manufacturer Communications
Source reference: 10139409
Received by source: 2018-06-04
Incident date: Unknown

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