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 | ||||||
| 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 | |||
| 11/19/2012 | 82760 | ||
| Vehicle is a 2002 gmc hd 2500 pickup truck with a duramax diesel engine, and 5 speed allison transmission while driving on surface streets, the power brakes and steering both went out siultaneously. stopping required both feet on pedal, and steering was nearly impossible. problem traced to the hydroboost and the power steering pump. both were replaced along with the high pressure hose. evidently, the pump failed to yield any boost pressure, which in turn rendered power steeling and brakes inoperative. a very dangerous situation. the tow truck thatreponded indicated that they have had multiple failures of the same items (87 ot 8 gmc hd trucks) and in blogs with other gmc/chevy diesel owners it apears to be a common defect. thewre were no noises, or other indicator of pending problems. contact with the dealer revealed that i should change the ps fluid every 2 years: (not in the maintainence section of owner manual) | |||
| STEERING - HYDRAULIC POWER ASSIST SYSTEM | |||
| 07/30/2003 | 36403 | 1 | 10/30/2002 |
| Diesel engine quit and it was only equipped with one fuse, and the fuse blew. this resulted in loss of power steering and brakes. *ak. the consumer stated the power steering failed and when that failed it caused the vehicle to have no brakes. *jb | |||
| STEERING - RACK AND PINION - PINION SHAFT | |||
| 12/20/2002 | 7500 | ||
| While driving at 20/35 mph, the vehicle pulled to the right and there was no power steering. consumer lost control of the vehicle. this was as a result of the steering shaft splitting in half. please provide more details. ts | |||