Cadillac Repair Questions? Ask a Mechanic for Answers ASAP
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Did they check the charging system when they checked the battery?
Sorry for the delay. I had to step out.
Did the guy at the dealer actually see the vehicle or was he just going off your description of it?
And did he tell you WHY he thinks its a bad engine?
Well that isnt entirely true. You can but you would have to remove it from the car and bench test it. I highly doubt he did that and I dont even know how that ties in to the engine being bad. A good battery and alternator doesnt make a bad engine. Addition by subtraction is a quick way to get a bad diagnoses. Do you have a multimeter?
The immobilizer will keep the engine from starting. It will NOT kill the engine if its already running.