Bravada 2WD L6-4.2L VIN S (2002)
Technical Service Bulletin # 01-02-32-005
Date: 010601
Power Steering - Whine Noise on Start Up
File In Section: 02 - Steering
Bulletin No.: 01-02-32-005
Date: June, 2001
TECHNICAL
Subject:
Whine Noise From Power Steering (P/S) System During Vehicle Start-up at Low Ambient Temperatures (Flush/Bleed P/S System, Change P/S Fluid)
Models:
2002 Chevrolet and GMC S/T Utility Models (New Body Style)
2002 Oldsmobile Bravada
With 4.2L 6 Cylinder Engine (VIN S - RPO LL8)
Condition
Some customers may comment on whine noise from the P/S system during vehicle start-up at low ambient temperatures (approximately -12°C (10°F)
and lower).
Cause
In cold ambient temperatures, the P/S fluid thickens in the same manner as any other petroleum based oil. Because of the length of the P/S lines, the
thickened oil causes the pump to be noisy during cold start-up.
Correction
Flush and Bleed the P/S system. Replace the P/S fluid with Cold Climate power steering fluid. Follow the service procedure listed below in order to flush
and bleed the P/S system.
Parts Information
Parts are currently available from GMSPO.
Warranty Information
For vehicles repaired under warranty use the table.
Disclaimer
