GM Service Manual Online
For 1990-2009 cars only
Makes
🢒
GMC_Truck
🢒
1999
🢒
Envoy - 4WD
🢒
Steering
🢒
Power Steering System
🢒 Swish Noise in Steering Pump
Problem
Action
A faulty control valve
Replace the pump. Refer to
Power Steering Pump Replacement
.