I have a 03 avalanche. Bought it used with 60000kms. I'm having problems with my dash lighting. All the lights on the steering wheel switches failed and the switches were replaced. Then the control knob lights on the stereo went out and the stereo was replaced. Now the off switch on the heater control works intermittenly and the lights on the controls on the rear consoul mounted radio have gone out. I have a feeling the previous repairs were fixing the result rather than the cause. Has anyone got any ideas? As a side note the battery has been replaced