Excessive Flare - Engine Overspeed on Wide-Open Throttle
WARNING: This page is about a different car, the 2010 GMC Sierra, 2010 GMC Cab & Chassis Sierra, 2010 Chevrolet Silverado, and 2010 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
| Condition | Action |
|---|---|
| Incorrect fluid level | Add fluid to the proper level. Refer to Transmission Fluid Level and Condition Check . |
| Sticking valves in control valve body assembly | Rebuild the control valve body assembly. Refer to Control Valve Body Replacement . |
| Low main pressure | Refer to Low Main Line Pressure in All Ranges and Low Main Line Pressure in Specific Ranges, Normal Pressure in Other Ranges . |
| Leaking pressure control solenoids | Repair or replace the pressure control solenoids. Refer to Control Valve Solenoid Replacement (SS1, SS2, SS3, TCC, and MAIN MOD) or Control Valve Solenoid Replacement (PCS1 and PCS2) . |
| Erratic speed sensor signal | Refer to the speed sensor DTCs. |
| Piston seals leaking or clutch plates slipping in range involved | Overhaul the transmission. |