NHTSA Defect Investigation #PE04004

HYDRAULIC PUMP SHAFT FAILURES: Service Brakes, Hydraulic**

CLOSED

no recall issued

** This defect investigation is filed under 5 related vehicle components.
2000 CHEVROLET C2500 -- The preliminary evaulation is being upgraded. During the ea ODI will limitits investigation to only those vehicles equipped with a hydro-boost system, which provides power assist to the braking and steering sytems. Vaccuum brake booster vehicles are excluded. ODI hasexpanded the scope of the ea to include model years2003 and 2004, asduring the PE, ODI learned that the hydroboast pumps were modified in febraury 2004. Therefore,ODI has expanded the scope to include the additional model years. ODI's is concerned because thisisa sudden failure that affects two critical systems of the vehicle, brakes and steering, at the same time. The ability of the operator to handle the dual failures is a concern. Further, these vehicles tend to be work vehicles, with some over 10,000 pounds gvwr and many equipped to pull large trailers. Dual failures of heavily loaded vehicles and vehicles pulling trailers further increases the safety risk. ODI plans to conduct testing to quantify the braking and steering performance degradation and the impact on safe vehicle control, when a hydroboast pump fails. Investigation was initiated on January 08 2004. Closed on April 30 2004. For detailed information & supporting documents, see the official NHTSA page concerning investigation #PE04004 »

NHTSA Defect Investigation #EA04012

HYDRAULIC PUMP FAILRES: Service Brakes, Hydraulic:Power Assist**

RECALL »

Recall #05V005000

** This defect investigation is filed under 2 related vehicle components.
2000 CHEVROLET C2500 -- 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. Investigation was initiated on April 30 2004. Closed on February 28 2005. For detailed information & supporting documents, see the official NHTSA page concerning investigation #EA04012 »