Investigations
| NHTSA ID | Manufacturer | Date open | Date close | Subject | Recall campaign | |
|---|---|---|---|---|---|---|
| SERVICE BRAKES, HYDRAULIC | ||||||
| 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. | ||||||
| SERVICE BRAKES, HYDRAULIC - POWER ASSIST | ||||||
| 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. | ||||||
| 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. | ||||||
| SERVICE BRAKES, HYDRAULIC - POWER ASSIST - HYDRAULIC | ||||||
| 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 |
|---|---|---|---|
| SERVICE BRAKES, HYDRAULIC | |||
| 10/08/2003 | 15000 | 2 | 08/18/2001 |
| While pulling into the driveway brakes and steering simultaneously failed. emergency brake had to be used to stop the truck. this failure was caused by the steering shaft breaking. dealership replaced steering shaft but the problem recurred within the next 15,000 miles while driving at 25-35 mph. *ak | |||
| 40000 | 1 | 12/01/1999 | |
| When the was in reverse on an incline, the front tires locked up and the back tires failed to function, which made it difficult to steer. *jb the brakes only lasted about 7-8 thousand miles. the brakes didn't perform very well and they locked up while driving down dirt roads. *nlm | |||
| 10/01/2000 | 1237 | 4 | 09/21/2000 |
| The brakes overheated and they smoked when driving on long steep grades, also when down shifting, it was difficult to slow or stop. the brakes were not adequate for the weight of the vehicle. the brake pads were replaced, the rotors were resurfaced, the rear brake drums were cleaned, and the brake shoes were adjusted. (this did not fix the problem) the vehicle continued to experience these problems. the dealer representative suggested the consumer purchase a 2001 model which had the revised braking system. *nlm *scc *jb | |||
| SERVICE BRAKES, HYDRAULIC - ANTILOCK | |||
| 12/23/2004 | 1 | 02/02/2000 | |
| The abs check light maintains on while the vehicle is having a difficult time stopping at inclines and intersections. consumer will contact dealer for check up.*ak vehicle rocks through stops in wet conditions with abs noises, but vehicle does not stop. *ak | |||
| 12/30/2002 | 17486 | 1 | |
| Applied abs brakes at 40 mph .brakes started to catch then went to floor causing increased stoppping distance and vehicle collision. | |||
| Vehicle has had several problems with braking system. dealer has repaired and replaced several parts of braking system, but problems still exists.*ak | |||
| Had applied gas to speed up and it would go back. engine kept revving, but remained at same speed. abs would kick in on any slippery surface. right front tire grabbed, hard, and then locked up when brakes were applied. at dealership all brake parts were repaired or replaced. *ak | |||
| 01/06/2001 | |||
| When applying brakes at 30mph pedal went to floor ,resulting in extended stopping distance, and causing a collision and injury. dealer and manufacturer has been notified.*ak | |||
| SERVICE BRAKES, HYDRAULIC - FOUNDATION COMPONENTS | |||
| 08/23/2002 | |||
| Consumer was approaching a intersection he applied brakes and brake pedal went straight to the floor. this was not the first incident. dealership is aware of problem.*ak | |||
| 04/12/2000 | |||
| When pressing brakes brake pedal violently kicked back towards the driver. please provide any further information. *ak | |||
| 03/27/2000 | 7 | ||
| The front brake pads and rear shoes have failed on several occasions, causing damage to drums and rotors, possible problem with the brake system to cause excessive wear. nlm | |||
| 03/27/2000 | 5 | ||
| The vehicle has experienced multiple brake failures, several repairs completed however the brakes failed resulting in the driver hitting the vehicle in front, the brake system is not designed sufficiently for the weight of the vehicle. *mjs | |||
| SERVICE BRAKES, HYDRAULIC - FOUNDATION COMPONENTS - DISC | |||
| There is a vibration coming from the vehicle during activation of the brake system while driving at any speed. dealership has examined vehicle, and replaced front brake rotors which have failed to effectively remedy the problem. also, rear brakes intermittently fail to activate while driving at any speed , possibly resulting in excessive wear of the front brakes. please provide any additional information / documentation.*ak | |||
| SERVICE BRAKES, HYDRAULIC - FOUNDATION COMPONENTS - DRUM | |||
| 09/20/2000 | 6 | 09/20/2000 | |
| Consumer states the rear brake shoes are wearing prematurely. took to dealer and they cant find problem. consumer has had six sets of brakes within a couple of years. *jb *yh | |||