GM Service Manual Online
For 1990-2009 cars only
Makes
🢒
GMC_Truck
🢒
2009
🢒
Sierra - 4WD
🢒
Diagnostic Navigation
🢒
Vehicle Diagnostic Information
🢒 Low Main Line Pressure in Specific Ranges, Normal Pressure in Other Ranges
Condition
Action
Seal leak
Replace the seals that are causing low pressure in a particular range.