Investigations
| NHTSA ID | Manufacturer | Date open | Date close | Subject | Recall campaign | |
|---|---|---|---|---|---|---|
| STEERING - HYDRAULIC POWER ASSIST - PUMP | ||||||
| PE04004 | GENERAL MOTORS CORP. | 01/08/2004 | 04/30/2004 | HYDRAULIC PUMP SHAFT FAILURES | ||
| 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. | ||||||
| STEERING - HYDRAULIC POWER ASSIST SYSTEM | ||||||
| EA04012 | GENERAL MOTORS CORP. | 04/30/2004 | 02/28/2005 | HYDRAULIC PUMP FAILRES | 05V005000 | |
| 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. | ||||||
| PE04004 | GENERAL MOTORS CORP. | 01/08/2004 | 04/30/2004 | HYDRAULIC PUMP SHAFT FAILURES | ||
| 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. | ||||||
Consumer Complaints
| Fail date | miles | occurences | Purchase date |
|---|---|---|---|
| STEERING | |||
| 11/28/2002 | 1 | 04/01/2002 | |
| The power steering pump failed causing the power steering and brake systems to fail at the same time. the garage stated that the power steering pump shaft broke. they replaced the power steering pump. the garage said that they have repaired several vehicles with this problem and are starting to see more of these failures. the garage did a fine job on the repairs. however, this could be potentially be a very, very dangerous situation, especially in heavy traffic or at higher speeds. thought you should be made aware. sincerely, william d. bowers dt | |||
| STEERING - HYDRAULIC POWER ASSIST - PUMP | |||
| 09/25/2005 | 60334 | 1 | 12/05/2003 |
| Dt: while driving at about 60 mph and the consumer stopped to perform a turn. after completing the turn there was a loss of brakes and power steering. the consumer was able to drive home. this happened without warning, no previous occurrences. the consumer self diagnosed the issue as with the power steering pump. the consumer took apart the power steering pump, and the driveshaft of the power steering pump was broken . the consumer felt this may be due to poor casting or undersized in design. the consumer has not replaced this at this time. the consumer contacted both the gm dealer and manufacturer. they were not willing to pay for any repairs. no repairs or corrections have been made at this time. *ak the consumer repaired the vehicle himself. *nm | |||