Dorman 603-009 Pressurized Coolant Reservoir with Cap Compatible with Select Chevrolet/GMC/International Models

Customers find the coolant reservoir fits perfectly and is very easy to install. However, the sensor reliability and quality receive mixed feedback, with some reporting it worked well for two years while others experienced sensor malfunctions. Moreover, the coolant level display shows mixed results - while some report no more low coolant messages, others continue to show low levels. Additionally, several customers report leakage issues at the seal.