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GMC Sierra 2500 Fast Idle

1
[font="mhh font", calibri, sans-serif]I have a 2024 GMC Sierra 2500 with the Duramax diesel. I want to add the Fast Idle function.  It requires a trip to the dealer, a new VCI built by GM and uploaded to my truck by the dealer.  I went to a local (Fort Worth, TX) dealer and they had my truck for 2 days but were unsuccessful in programming my truck. Fortunately the did not charge me.[/font]

[font="mhh font", calibri, sans-serif]Any suggestions for getting this done?  It is option UF3.[/font]

[font="mhh font", calibri, sans-serif]From the tech bulletin outlining what must be done:[/font]

[font="mhh font", calibri, sans-serif]Adding Fast Idle (UF3) – Adding the Fast Idle (UF3) feature is accomplished by reprogramming the Vehicle’s Body Control Module (BCM). GM Dealers can acquire a new Vehicle Configuration Index (VCI) by contacting Techline Customer Support Center (TCSC). A support center consultant will create the new VCI with UF3 option as part of the vehicle option content. For [/font][font="mhh font", calibri, sans-serif]2024 2500/3500[/font][font="mhh font", calibri, sans-serif] HD application vehicles: - Adding UF3 to a 2024MY 2500/3500 HD truck requires BOTH the ECM and BCM to be reprogrammed following the update to VCI by Techline. NOTE: Following the reprogramming of the ECM, a secondary Set Up procedure most be performed as well to fully activate the feature.[/font]
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