I have a 1991 Cadillac Seville, Went over to Iraq for 8 months came home and lost all Trip Computer Funtions/ Heating and Cooling Funtions, Check Engine Light on , All controls are blank. Ran Self Diag Test and found that Im getting lost data to any computers. BCM . etc. I dont have $2,000 to pay dealer to chase problem. I see its a common problem but no one ever posts what they went through to fix. Is it a short, bad ground, BCM ????? dont know where to start without replacing expensive parts.
Your help would be appreciated.
rich
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