So actually have a suburban 2010, 5.3l started to run hot at highway speeds. Didn't see any visible leaks but the reservoir but it was releasing pressure and not leaking but replaced it anyways for safety measures. Replaced lower hose w/ coiled hose, thermostat and reservoir. Test drove, got better so no running hot at 70mph but as soon as you go 75mph or higher it starts to climb and eventually it will over heat. So i replaced the radiator thinking it was clogged and still having the same symptoms .
How long has your 2010 Chevrolet Suburban 1500 had this problem?
RepairPal Certified shops can diagnose and repair your 2010 Chevrolet Suburban 1500. They provide transparent pricing with a minimum 12-month or 12,000-mile warranty on repairs and services.
