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My Mother inlaw has a 2009 Vette Base model. Having issues with the display coming up Antilock brakes needs service, low coolant level, service fuel system and gage goes to E, radio back light flashes bright and thats when all the bells start going off. Any suggestions I removed the grounds that I could find and cleaned them still no luck.
Location would help,since sone one local could give you hand to first pull codes/get a tech II on the car, as well as pull the battery to cold crank test it.
Also to check the starter solenoid terminal where the battery cable to alternator cable connects together, make sure that the cable terminal at the engine fuse box is tight, then take voltage readings as the alternator/battery, engine fuse box with the car running, to at least weed out problem with just the charging system under the hood.
Also, does this car have any history of flood damage to start with.
Hell, could be a simple one, and have you check the spark plug wires to make sure they are tight to the spark plugs and coils above? One or more of them pops loose, and it will cause all kinds of codes that will never track back to its DTC in the first place.