I replaced one of the battery cables (the shorter cable) in my Malibu because of corrosion. The next day many of the warning lights (check engine light, service vehicle soon light, battery light, low fuel light, anti-theft light, etc.) started to come on and off. And for a few minutes after I start the car, the fuel gauge shows that there's no fuel in the tank even if the tank is full. I took my car to a mechanic who checked the battery cable and suggested I change the gas cap. I did but it didn't help. I went to another mechanic who suggested that the problem is with my car's emissions & quoted me $55 for a proper diagnosis and said that it would probably cost about $275 to repair. Could my car's problem be with its emissions? Or is there something up with the battery and/or battery cable? (I never had any of these problems before replacing the cable.)
Warning Lights on 2000 Chevrolet Malibu
Have they verified that the cable replaced is secure and no other wire that should attach to the battery has become damaged or is now experiencing a "voltage drop". If the check engine light is on I would want to see the codes found in the computer to see what they flag as being wrong. I think the Malibu has a Service Bulletin about defective gas gauge sender units, the sender unit input is needed to operate the evaporative emission self test, if it fails it will bring on the check engine light.