The Chevy Duty latches are suspect at best. However, first, I have posted an article in "TECH TIPS" on how the latches work and provide some ideas that may help. Lubrication is critical, new or old. Second, I know Chevy Duty has heard multiple complaints as I lodged one with them and know that several others have, too. Third, when I contacted Chevy Duty, they were great and replaced the latches even though I bought the originals a year earlier. The new ones worked better but still had "issues". Bottom line - go with originals if you can.
