Oil Pressure High or Low
WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2004 Oldsmobile Bravada, 2004 GMC Envoy XUV, 2004 GMC Envoy XL, 2004 GMC Envoy, and 2004 Chevrolet TrailBlazer. However, it is still accessible from the selected car via links, so may be relevant.
Oil Pressure High or Low
| Checks |
Causes |
| Oil Pump Assembly (4) |
- Pressure regulator valve stuck
- Pressure regulator valve spring
- Rotor guide omitted or misassembled
- Rotor cracked or broken
- Reverse boost valve or sleeve stuck, damaged or incorrectly assembled
- Orifice hole in pressure regulator valve plugged
- Sticking slide or excessive rotor clearance
- Pressure relief ball not seated or damaged
- Porosity in pump cover or body
- Wrong pump cover
- Pump faces not flat
- Excessive rotor clearance
|
| Oil Filter (72) |
- Intake pipe restricted by casting flash
- Cracks in filter body or intake pipe
- O-ring seal missing, cut or damaged
- Wrong grease used on rebuild
|
| Control Valve Body (60) |
- Manual valve scored or damaged
- Spacer plate or gaskets incorrect, misassembled or damaged
- Face not flat
- 2-3 Shift valve stuck
- Checkballs omitted or misassembled
|
| Pressure Control Solenoid (377) |
Damage to electrical terminals |
| Transmission Fluid Pressure Manual Valve Position Switch (69) |
- Contamination
- Damaged seals
|
| Case (103) |
Case to control valve body face not flat |
| System Voltage |
- 12 volts not supplied to transmission
- Electrical short (pinched solenoid wire)
- Solenoid not grounded
|