Ignition Switch??
I am experiencing both dash lights ABS and TCS on with no HVAC controls working also. All three problems seem to show up at the exact same time, coincidently it was days after having a new audio system installed (professionally). Is there any way that these could be related? The DIC gives me a no comm with the TCS and PCM gives a 1571 and a 1698. Any suggestions/advice would be greatly appreciated. It is in a 2001 C5. Could it be the ignition switch?.


