One problem related to radiator has been reported for the 2006 Chevrolet Monte Carlo. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2006 Chevrolet Monte Carlo based on all problems reported for the 2006 Monte Carlo.
Internal radiator crack. This allowed the coolant and trans fluid to commingle thus causing the transmission to slip. It also had potential to damage many internal components. No external damage thus must be manufacture defect.