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Defect Investigation of Hydraulic Pump Failres

Investigation of Hydraulic Pump Failres

Subject:	Hydraulic pump failres
Components covered:	Brake power assist Steering hydraulic power assist system
Investigations Summary:	This investigation was opened on Apr. 30, 2004. It was closed on Feb. 28, 2005. Note: this investigation has resulted in a vehicle safety recall. Gm is conducting a recall on all subject vehicles build between may 1999 and October 14, 1999. Significant changes were incorporated into production in early October 1999, and vehicles built after that date have lower warranty failure rates. The complaint and warranty data appear to support the effectiveness of these changes. Gm made additional changes in November 1999, February 2000, may 2001, and February 2004. Odi will continue to monitor this problem and will take further action, if warranted, in the future. For further technical details see the attached engineering analysis report.
Vehicles Affected by this investigation:	2001 Chevrolet 2500 2000 Chevrolet Avalanche 2001 Chevrolet Avalanche 2002 Chevrolet Avalanche 2003 Chevrolet Avalanche 2004 Chevrolet Avalanche 2000 Chevrolet C Pickup 2000 Chevrolet C Series 2001 Chevrolet C Series 2002 Chevrolet C Series 2000 Chevrolet C Series (medium) 2001 Chevrolet C Series (medium) 2000 Chevrolet C/k 2500 2001 Chevrolet C/k 2500 2002 Chevrolet C/k 2500 2000 Chevrolet C/k 3500 2001 Chevrolet C/k 3500 2000 Chevrolet C/k Pickups 2001 Chevrolet C/k Pickups 2002 Chevrolet C/k Pickups 2003 Chevrolet C/k Pickups 2000 Chevrolet C/k Utility 2001 Chevrolet C/k Utility 2000 Chevrolet C25 2001 Chevrolet C25 2002 Chevrolet C25 2000 Chevrolet C2500 2001 Chevrolet C2500 2002 Chevrolet C2500 2003 Chevrolet C2500 2000 Chevrolet C35 2001 Chevrolet C35 2000 Chevrolet C3500 2001 Chevrolet C3500 2002 Chevrolet C3500 2000 Chevrolet Chevrolet Truck 2001 Chevrolet Chevrolet Truck 2002 Chevrolet Chevrolet Truck 2003 Chevrolet Chevrolet Truck 2000 Chevrolet Chevy Van 2001 Chevrolet Chevy Van 2003 Chevrolet Chevy Van 2000 Chevrolet Express 2001 Chevrolet Express 2002 Chevrolet Express 2003 Chevrolet Express 2004 Chevrolet Express 2000 Chevrolet G Series 2001 Chevrolet G Series 2002 Chevrolet G Series 2003 Chevrolet G Series 2000 Chevrolet G Van 2001 Chevrolet G Van 2002 Chevrolet G Van 2000 Chevrolet G25 2001 Chevrolet G25 2002 Chevrolet G25 2000 Chevrolet G35 2001 Chevrolet G35 2002 Chevrolet G35 2001 Chevrolet Gmt 800 2002 Chevrolet Gmt 800 2000 Chevrolet K Pickup 2000 Chevrolet K Series 2001 Chevrolet K Series 2002 Chevrolet K Series 2000 Chevrolet K25 2001 Chevrolet K25 2000 Chevrolet K2500 2001 Chevrolet K2500 2002 Chevrolet K2500 2000 Chevrolet K35 2001 Chevrolet K35 2002 Chevrolet K35 2000 Chevrolet K3500 2001 Chevrolet K3500 2002 Chevrolet K3500 2000 Chevrolet Pickup 2001 Chevrolet Pickup 2002 Chevrolet Pickup 2003 Chevrolet Pickup 2000 Chevrolet Savanah 2002 Chevrolet Savanah 2000 Chevrolet Sierra 2001 Chevrolet Sierra 2002 Chevrolet Sierra 2003 Chevrolet Sierra 2000 Chevrolet Silverado 2001 Chevrolet Silverado 2002 Chevrolet Silverado 2003 Chevrolet Silverado 2004 Chevrolet Silverado 2000 Chevrolet Silverado 2500 2001 Chevrolet Silverado 2500 2002 Chevrolet Silverado 2500 2003 Chevrolet Silverado 2500 2000 Chevrolet Silverado 3500 2001 Chevrolet Silverado 3500 2002 Chevrolet Silverado 3500 2000 Chevrolet Suburban 2001 Chevrolet Suburban 2002 Chevrolet Suburban 2003 Chevrolet Suburban 2004 Chevrolet Suburban 2000 Chevrolet VAN 2001 Chevrolet VAN 2002 Chevrolet VAN 2000 Chevrolet Yukon 2001 Chevrolet Yukon 2002 Chevrolet Yukon 2003 Chevrolet Yukon 2000 Chevrolet Yukon Xl 2000 GMC Savana 2002 GMC Savana

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