GM Service Manual Online
For 1990-2009 cars only

Increase in Effort While Turning Steering Wheel for GMC Truck GMC P42 Commercial Chassis 1999

Problem

Action

Low oil level in the pump

Add power steering fluid as required. Refer to the appropriate procedure from the following list:

The pump belt is slipping.

Refer to Engine Cooling.

High internal leakage (steering gear or pump)

Refer to Power Steering System Test .