I have a 2001 Suburban here, 6.0L with eFans installed and relays operating correctly (testing with ground wires, they power on/off perfectly). Trigger wire from pin 42 is being used, as per all articles.
The issue is when turning the ignition on, fans do not run, but ONCE the car is started, they come on in 5 seconds.
PCM Serv. No. 12200411
HDW NO. 09386530
I see some posts about this from long past, but nothing that ends in a solution.
Anyone have any knowledge on how to fix this?