Hi all - I have sporadically had 3 amigos come and go over my ownership time with my 04 HSE7. Looking to fix shuttle valve in near future, so this may solve with it..

Recently I have had ONLY the TC and HDC lights come on at startup and stay on, and it has been like this for several days and 10-15 startups. This is a new one for me and I'm not sure if it signifies anything different than standard shuttle valve failure. Potentially related is that I have a humming sound from somewhere in the front when I accelerate, but it stops when I coast. I searched all over and saw threads about hubs/wheel bearings, but still wasn't sure. Any way to diagnose easily?

 

get the ABS codes read. that is strange that you only have two amigos, but codes should help point you in the right direction.

 

Does the ABS warning light come on at startup? i.e., Is the bulb burned out?

 

@H20nSnow Yes the light comes on at startup so burnt out bulb or tape