Mechanics

HYBRID POWER STEERING

2004 GMC Sierra Hybrid

Steering problem
2004 GMC Sierra Hybrid V8 Four Wheel Drive Automatic 110000 miles

The Power Steering/Brakes Hydraulic pump is not operating. I have fluid, the pump is not operating and I have 37-40 volts at the plug.

Is ther a control circuit that can be troubleshot or can the pump be checked before I spend 500 bux for a new pump
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Gdudman
March 5, 2010.



Hello gdudman

If you have 37-40 volt at the motor and the pump is not working, check for continuity between the motor and the pump.
If there is continuity, replace the pump.
If there is no continuity, search for an open between the two.
The hydraulic pressure is provided by the pump driven by the electric motor.

Tiny
Mathiaso
Mar 6, 2010.
I replaced the pump and still no-go. Is there a control circuit or module that controls this

Tiny
Gdudman
Apr 21, 2010.
To be more specific I have the following
· Sierra 1500 4WD
· Sierra 2500 4WD
· Sierra 2500HD 4WD
· Sierra 3500 4WD

tell me which one is yours.

Tiny
Mathiaso
Apr 22, 2010.