One problem related to battery has been reported for the 2003 Chevrolet Monte Carlo. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2003 Chevrolet Monte Carlo based on all problems reported for the 2003 Monte Carlo.
There was no event leading up to this failure. The battery and charging system are operating as per spec. Factory ac/delco battery supplied with new 2003 Chevrolet spontaneously started leaking liquid acid from the casing surrounding the anode. The acid drained onto surrounding vehicle parts and ground. I removed the battery, cleaned the affected parts and installed a new battery. I retained the original defective battery for inspection.