G6 V6-3.6L (2007)
Power Steering Fluid Reservoir: All Technical Service Bulletins
Power Steering - Zipper/Grinding Noise On Cold Start Up
Bulletin No.: 07-02-32-004
Date: March 30, 2007
TECHNICAL
Subject:
Power Steering Zipper/Grinding Noise at Start Up During Cold Temperatures (Replace Power Steering Reservoir)
Models:
2007 Pontiac G6
2007 Saturn AURA
with 3.6L Engine (VIN Code 7 - RPO LY7)
Built Prior to the VIN Breakpoints shown.
Condition
Some customers may comment on a zipper/grinding type noise coming from the engine compartment or power steering pump at initial start up during
cold temperatures, usually below 10°F (12°C). This noise may last for approximately 20 minutes.
Cause
When the power steering fluid is cold, it may be pulled out of the reservoir quicker than it can be put back in. This may cause the inlet pipe in the
reservoir to become uncovered, allowing air to be pumped into the power steering system. No effect on steering performance has been noted.
Correction
Verify that the power steering reservoir is filled with fluid. If it is, then replace the power steering reservoir with P/N 25780649. This new reservoir has
an inlet pipe with a different configuration to reduce the possibility of air being drawn into the system. Follow the Remote Power Steering Fluid
Reservoir Replacement procedure in SI.
After installation, noise may still be possible with the new reservoir until trapped air has circulated through the system and been released through the
reservoir vent.
Parts Information
Warranty Information
