OEM autostart...timeout override?

[Mark Rinker]

2009 K3500HD came with OEM autostart. Runs for 10-15 minutes max, then shuts off.

Override possible, or at least lengthen interval? If no user accessible control, can dealership or EFI live reprogram default setting?

[Kennedy]

The aftermarket ones are/were selectable run time, but I'm not sure about anything indefinite. A good bit of this could be liability as the remote starter does not know if you are in the garage or not. Programming the OE unit will likely never happen. This command should be in the BCM and I doubt anybody would invest the time to conquer this module and build the interface/boot loaders etc. to make this possible.

Excessive idle time will give you all sorts of grief with the DPF also...