Yukon Denali AWD V8-6.2L (2007)
A list of involved vehicles currently in dealer inventory is attached to the Administrative Message (US) or Dealer Communication (Canada) used to
release this bulletin. Customer vehicles that return for service, for any reason, and are still covered under the vehicle's base warranty, and are within the
VIN breakpoints provided below, should be checked for vehicle eligibility in the appropriate system listed below.
Important:
Dealers are to confirm vehicle eligibility prior to beginning repairs by using GMVIS. Not all vehicles within the above breakpoints may be involved.
Service Procedure
Important:
Technicians may experience slow performance using the TIS2 web application when reprogramming the vehicle to correct the condition.
Technicians may notice the slower application performance from mid-morning until late afternoon.
To assist in improving performance and reduce programming time, it is recommended to complete the bulletin procedure on customer vehicles
first. Vehicles in inventory should be programmed during off peak hours if slow performance is experienced.
Important:
The calibration numbers required for this service procedure are programmed into control modules via a Techline Tech 2(R) scan tool and the
Techline Information System (TIS) terminal with the calibration update. Use TIS 2 Web version 2.0 for 2007 (available on 02/04/07) and on
TIS DVD version 2.0/2007 or later, that was mailed to dealers on 02/14/2007. If you cannot access the calibration, call the Techline Customer
Support Center.
Notice:
Before reprogramming, please check the battery condition to prevent a reprogramming error of any of the modules due to battery discharge.
Battery voltage must be between 12 and 16 volts during reprogramming. If the vehicle battery is not fully charged, use jumper cables from an
additional battery. Be sure to turn off or disable any system that may put a load on the battery, such as automatic headlamps, daytime running
lights, interior lights, heating, ventilation, and air conditioning (HVAC) system, radio, engine cooling fan, etc. A programming failure or
control module damage may occur if battery voltage guidelines are not observed.
The ignition switch must be in the proper position. The Tech 2(R) prompts you to turn ON the ignition, with the engine OFF. DO NOT change the
