Hybrid Cooling System Overheating (Mechanical)
WARNING: This page is about a different car, the 2008 GMC Yukon and 2008 Chevrolet Tahoe. However, it is still accessible from the selected car via links, so may be relevant.
| Step | Action | Yes | No |
|---|---|---|---|
| 1 | Inspect for a missing or damaged radiator side or upper baffle and/or radiator air deflector. Is the baffle and/or deflector missing or damaged? |
Go to Step 10 | Go to Step 2 |
| 2 | Inspect for a loss of coolant. Is there a loss of coolant? |
Go to Step 3 | Go to Step 4 |
| 3 | Fill the system to the specified level. Does the hybrid cooling system overheat? |
Go to Step 4 | System OK |
| 4 | Inspect for low temperature protection. Is the coolant to the correct concentration? |
Go to Step 5 | Go to Step 10 |
| 5 | Inspect for a loss of cooling system pressure. Is there a loss of system pressure? |
Go to Step 10 | Go to Step 6 |
| 6 | Inspect for a faulty coolant temperature sensor. Refer to DTC P0A01-P0A03 . Is the sensor operating properly? |
Go to Step 7 | Go to Step 8 |
| 7 | Inspect for the following:
Were any of the above found? |
Go to Step 10 | Go to Step 3 |
| 8 | Inspect the auxiliary coolant pumps for proper operation. Is the pump operating properly? |
Go to Step 9 | Go to Step 10 |
| 9 | Inspect for obstructed radiator air flow or bent radiator fins. Is the radiator air flow obstructed? |
Go to Step 10 | - |
| 10 | Repair or install new parts as necessary, then retest. | - | System OK |