An illuminated check engine light (MIL) on a 2005 Cadillac Escalade with a 6.0L V8. The shop was wrestling with an IAT temp code, but was hesitant about changing the MAF sensor due to the low mileage (18,000) on the vehicle.
Theft deterrents make sense on a new vehicle. Eventually, though, these become old vehicles that have to be repaired. How do you diagnose the GM Passkey III system that is designed to prevent the engine from starting? We can’t ask a car thief, can we?