NHTSA Defect Investigation #EA01018

SEAT BELT ANCHORAGE SEPARATION: Seat Belts:Front:Anchorage

CLOSED

no recall issued

1999 GMC YUKON -- Alleges that the 2nd row passenger-side seat belt release buckle anchor detached from seat frame during a side impact. Investigation was initiated on December 20 2001. Closed on December 09 2002. For detailed information & supporting documents, see the official NHTSA page concerning investigation #EA01018 »

NHTSA Defect Investigation #PE01023

SEAT BELT ANCHORAGE SEPARATION: Seat Belts:Front:Anchorage

CLOSED

no recall issued

1999 GMC YUKON -- Allege that the 2nd row passenger-side seat belt release buckle anchor detached from the seat frame during a side impact. Investigation was initiated on July 17 2001. Closed on December 20 2001. For detailed information & supporting documents, see the official NHTSA page concerning investigation #PE01023 »

NHTSA Defect Investigation #PE05020

UNWANTED LOW-SPEED ABS ACTIVATION: Service Brakes, Hydraulic:Antilock**

RECALL »

Recall #05V379000

** This defect investigation is filed under 2 related vehicle components.
1999 GMC YUKON -- In a letter dated August 29, 2005, GM notified ODI that it was recalling certain model year 1999 through 2002 C/K pickup trucks and sport utility vehicles to correct a problem with anti-lock brake system (ABS) wheel speed sensor corrosion that may result in unwanted ABS activation and extended stopping distances during low-speed braking (recall 05V-379). GM's recall covers approximately 804,000 vehicles currently registered in the following 14 "salt-belt" states:Connecticut, Illinois, Indiana, Massachusetts, Maine, Michigan, New Hampshire, New Jersey, New York, Ohio, Pennsylvania, Rhode Island, Vermont, and West Virginia. The recall procedure will involve removing the sensor, cleaning the mounting surface, applying a rust inhibitor (zinc-X) to the surface, and reinstalling the sensor. If necessary, the sensor will be replaced. The population and failure report data given in this resume are for the full region that has been considered by ODI as the "salt-belt."that includes Delaware, Iowa, Maryland, Minnesota, Missouri, Wisconsin and the District of Columbia in addition to the 14 states included in 05V-379. The states covered by GM's recall have the highest incident rates for the subject condition, accounting for 91% of the incidents, but only 24% of subject vehicle sales in the United States. ODI's analysis determined that 840 of the complaints, 244 of the crashes, and 16 of the injuries identified in this investigation occurred in those states. The resulting incident and crash rates are 96.2 and 28.0 per 100,000 vehicles respectively (note:rates are based on vehicle sales, not registered vehicles). The corresponding numbers in the excluded portions of the "salt-belt" are 399,000 vehicles, 81 incidents (20.3 per 100,000 vehicles), 3 crashes, and no injuries. The statistics in the remaining 30 states are 2,406,000 vehicles, 168 incidents (7.0 per 100,000 vehicles), 31 crashes, and one injury. GM and ODI are continuing to monitor the problem experience in states that are not included in the recall. GM will provide ODI with updated complaint, field report, and warranty data in November 2005. ODI and GM will review that data and assess the appropriateness of the current scope of the recall at that time. Investigation was initiated on April 28 2005. Closed on September 13 2005. For detailed information & supporting documents, see the official NHTSA page concerning investigation #PE05020 »

NHTSA Defect Investigation #EA99011

ERRATIC POWER STEERING ASSIST WHILE DRIV: Steering

CLOSED

no recall issued

1999 GMC YUKON -- Alleged that a fault within the steering wheel speed sensor sends false signals to the variable effort steering (ves) control electronics, causing unanticipated steering wheel movement at moderate to high speeds. Investigation was initiated on May 12 1999. Closed on February 27 2001. For detailed information & supporting documents, see the official NHTSA page concerning investigation #EA99011 »

NHTSA Defect Investigation #EA02015

THROTTLE STICKING CLOSED: Vehicle Speed Control:Linkages

CLOSED

no recall issued

1999 GMC YUKON -- This investigation involves the General Motors corporation (GM)throttle body (TB) utilized in model year (MY) 1999-2002 Silverado, Sierra, Tahoe, Suburban, Avalanche and Yukon (subject vehicle(s)) with 4.8L, 5.3L, and 6.0L engines. The TB valve may intermittently stick in a closed position. In such a situation, an operator may apply additional accelerator pedal force to increase engine speed. The application of additional accelerator pedal force, to open a stuck throttle valve, may open the throttle valve more than intended and, in turn, accelerate the engine and vehicle more than intended and reasonably expected by the driver. On August 1, 2002, the Office Of Defects Investigation (ODI), of the National Highway Traffic Safety Administration (NHTSA), opened this engineering analysis. The investigation revealed that two factors may cause the defect: 1) TB manufacturing process problems; and 2) accumulation of deposits (a PCV system by-product) on or around the TB throttle valve and bore. ODI concludes that the TB performs in a defective manner after analyzing GM¿S data submissions, and test data collected by the Vehicle Research And Test Center (VRTC). Fifty-nine crashes are alleged to have occurred as a result of GM¿S TB defect. The majority of the crashes involve a single vehicle, engaging in a close quarter vehicle maneuver (or low speed), and causing only minor property damage. Four out of the fifty-nine crashes involve injury, and those injuries were minor. Although GM¿S TB is defective, based on the evidence gathered, ODI has found that the accelerator pedal force required to open a stuck throttle valve is negligible, and the throttle valve does not stick in the open position. Therefore this engineering analysis (EA02-015) will be closed at this time. The closing of this investigation does not constitute a finding by NHTSA that a safety-related defect does not exist. For a detailed discussion of the TB component and testing, please see the attached report. Investigation was initiated on August 01 2002. Closed on January 12 2004. For detailed information & supporting documents, see the official NHTSA page concerning investigation #EA02015 »