Step | Action | Value(s) | Yes | No | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
1 | Do a visual system check to look for a coolant loss. Check the ground under the vehicle. Is there coolant on the ground? | -- | -- | |||||||||
2 | Check the radiator for stains and wetness. Is the radiator wet or stained? | -- | ||||||||||
3 | Repair or replace the radiator as necessary. Use any of the following procedures:
Is there still a loss of coolant? | -- | System OK | |||||||||
4 | Check the hoses for stains or wetness. Are the hoses stained or wet? | -- | ||||||||||
5 | Repair or replace the hoses as necessary. Refer to Radiator Hose Replacement . Is there still a loss of coolant? | -- | System OK | |||||||||
6 | Check the water pump for stains or wetness. Is the water pump stained or wet? | -- | ||||||||||
7 | Repair or replace the water pump. Use any of the following procedures:
Is there still a loss of coolant? | -- | System OK | |||||||||
8 | Check the coolant recovery reservoir. Does the coolant overflow after you stop the engine? | -- | -- | |||||||||
9 | Check the radiator cap for pressure retention. Is the radiator cap retaining the proper pressure? | 103 kPa (15 psi) | ||||||||||
10 | Check the temperature reading. Is the temperature too high? | -- | Go to Engine Overheating . | |||||||||
11 | Replace the radiator cap. Refer to Pressure Cap Description . Is there still a loss of coolant? | -- | System OK | |||||||||
12 | Check the coolant gravity for glycol concentration. Refer to Coolant Concentration Testing . Is the glycol concentration too low? | -- | System OK | |||||||||
13 | Replace the glycol with a 50/50 mixture in accordance with GM 6277M. Is there still a loss of coolant? | -- | -- | System OK |
