NHTSA Office of Defects Investigation
Preliminary Evaluation PE99-073: BATTERY LEAKS ACID
- Closed
NHTSA's Office of Defects Investigation opened Preliminary Evaluation PE99-073 on December 3, 1999 and closed it on May 2, 2000. NHTSA's investigations file lists 3 models from 2 makes for it.
Updated daily from NHTSA's investigations file
Key facts
- NHTSA number
- PE99-073 (also written PE99073)
- Investigation type
- Preliminary Evaluation The first stage of most defect investigations: NHTSA's Office of Defects Investigation gathers basic information about a possible safety defect, including from the manufacturer.
- Status
- Closed May 2, 2000
- Opened
- Closed
- Vehicle or equipment manufacturer
- General Motors, LLC
- Component
- Electrical System
- Vehicles and equipment
- 3 models from 2 makes, including the Chevrolet Tahoe and GMC Suburban
A recall appears here only when NHTSA's investigations file links one to the investigation; NHTSA's summary or record can name others.
NHTSA's summary
As NHTSA's Office of Defects Investigation wrote it for Preliminary Evaluation PE99-073.
ODI HAS RECEIVED 21 COMPLAINTS WHERE OWNERS ALLEGE THAT THE STANDARD GM FACTORY SUPPLIED AC DELCO BATTERY CASE FAILED, RESULTING IN THE LEAKAGE OF SULFURIC ACID.OF THE 21 COMPLAINT VEHICLES, SIX SUBURBAN, THREE TAHOES, AND ONE YUKON OWNER(S) COMPLAINED ABOUT A LOSS OF BRAKE FLUID FROM DETERIORATION OF THE RIGHT FRONTBRAKE LINE AS A RESULT OF SULFURIC ACID CONTAMINATION.THE REMAINING 11 COMPLAINTS PERTAIN PRIMARILY TO SULFURIC ACID LEAKAGE FROM THE BATTERY CASE.AT LEAST ONE COMPLAINANT STATED THAT THE REPLACEMENT BATTERY ALSO FAILED.SEVERAL OF THE COMPLAINANTS NOTE THAT THE LEAKING ACID HAD COME IN CONTACT WITH A WIRE HARNESS AT THE FRAME IN THE VICINITY OF THE STEEL BRAKE LINE.A FIELD INSPECTION BY ODI INDICATES THAT THE DESCRIBED HARNESS IS THE ABS CONNECTION TO THE RIGHT FRONT WHEEL SPEED SENSOR.PRIOR TO THE BATTERY CASE FAILURE, THERE IS USUALLY NO WARNING (SHORT OF AN UNDERHOOD INSPECTION), AND THE ENSURING DAMAGE (SULFURIC ACID CONTAMINATION) IS PROGRESSIVE.OF THE KNOWN BATTERY FAILURES, THERE MAY BE A TEMPERATURE CORRELATION, AS 60% OF THE OWNER COMPLAINTS CAME FROM FOUR STATES; CALIFORNIA, FLORIDA, GEORGIA AND TEXAS.THERE IS ALSO A PRODUCT IMPROVEMENT PROGRAM AND ENGINEERING CHANGE NOTICE TO ADD 1% SILVER TO THE BATTERY'S POSITIVE SIDE TERMINALL, WITH THE EARLIEST IMPLEMENTATION DATE FOR THIS BEING FEB 2, 1998.
THE EFFECT OF THIS DESIGN CHANGE IS AS YET UNKNOWN; FURTHER REVIEW IS WARRANTED.AN EA IS BEING OPENED TO GATHER FURTHER APPROPRIATE INFORMATION, CLARIFY ANY DEFECT TRENDS, AND TO ASSESS THE SAFETY IMPLICATIONS AND RISKS CONCERNING THESE FAILURES.
Vehicles and equipment listed for this investigation
NHTSA's investigations file lists these vehicles and equipment for Preliminary Evaluation PE99-073. A listed model year means only that an investigation names it; it says nothing about any particular vehicle. Model years with a try.vin recall page link to that page's NHTSA investigations section.
What an NHTSA investigation is
NHTSA's Office of Defects Investigation (ODI) looks into possible safety defects in vehicles and equipment, often after owner complaints. An investigation usually starts as a Preliminary Evaluation, or as a Recall Query when it concerns whether an existing recall covers the right vehicles or fixes the problem, and ODI can upgrade it to a more detailed Engineering Analysis. A Defect Petition asks NHTSA to open an investigation, and Audit and Equipment Queries are administrative investigations into whether companies complied with federal vehicle safety requirements, such as reporting, recall and certification rules.
An open investigation is not a finding that a safety defect exists, and NHTSA can close one without a recall.
To see whether a specific vehicle has an open recall, enter its VIN at nhtsa.gov/recalls.
Free VIN check: decode a VIN to see its year, make and model.
Sources
NHTSA's investigation record for PE99-073
Investigation details come from NHTSA's investigations file, which try.vin imports once a day. The investigation types are described from the U.S. Department of Transportation Inspector General's May 2023 report on NHTSA's Office of Defects Investigation, NHTSA's petition rules (49 CFR Parts 552 and 557) and NHTSA's Office of Defects Investigation procedures. How try.vin reads NHTSA investigations.