2001 GMC Sierra 2500 problems

What is wrong

Vehicle description: certain pickup trucks equipped with 6.6l diesel engines fail to comply with requirements of fmvss no. 105, "hydraulic and electric brake systems." these vehicles have a brake system warning light in the instrument cluster that may not illuminate when the brake fluid is low. In addition, when the brake fluid is low, the vehicle may not meet the partial system requirements of fmvss no. 105.

Risk

These conditions could result in reduced braking capability, which could lead to a crash.

Remedy

Dealers will change the location of a wire connection in the underhood bussed electrical center. Owner notification began july 9, 2001. Owners who take their vehicles to an authorized dealer on an agreed upon service date and do not receive the free remedy within a reasonable time should contact chevrolet at 1‑800‑222‑1020 or gmc at 1‑800‑462‑8782.

Recall number 01V220000 · Recall details

What is wrong

Vehicle description: certain 2-wheel drive pickup trucks fail to comply with requirements of fmvss no. 120, "tire selection and rims for motor vehicles other than passenger cars." the problem was caused by a computer error that resulted in the certification label listing tire size and inflation pressure information that differ from the tire size and the inflation pressure information for the tires on the vehicle. If the vehicle owner or someone servicing the vehicle inflates the tires according to the pressure specified on the label versus the appropriate pressure for the tires, the tires could be under-inflated or over-inflated depending on the tires mounted on the vehicle.

Risk

If the tires are under-inflated, it could reduce the tread life of the tire, and the tire could degrade to a point of allowing sudden air loss. If the tires are over-inflated, it could reduce the tread life of the tire and increase susceptibility to road hazard damage. If sudden air loss or a road hazard causes damage to a tire, control of the vehicle could be adversely affected and could result in a vehicle crash.

Remedy

Owners will be provided with a new label and installation instructions. However, a dealer can install the label if the owner so desires. Owner notification began may 31, 2001. Owners who do not receive the label and installation instructions within a reasonable time should contact chevrolet at 1‑800‑222‑1020 or gmc at 1‑800‑462‑8782.

Recall number 01V125000 · Recall details

In a letter dated november 7, 2007, general motors (gm) reported to the office of defects investigation (odi) that it will conduct a safety recall (07v‑521) to replace the crank position sensor (ckp) in approximately 12,000 model year (my) 2001 chevrolet silverado and gmc sierra vehicles equipped with 8.1 liter engines manufactured on or before november 15, 2000.according to gm, the ckp can fail intermittently or permanently.a permanent ckp failure would result in an engine stall without restart.an intermittent ckp failure could cause the service engine soon light to illuminate, the vehicle to run rough or the engine to stall but allows restart.as a remedy, an improved ckp will be installed in the subject vehicles.the recall campaign will start in december 2007. During the preliminary evaluation (pe06-016), and this ea investigation, gm and odi independently conducted detailed reviews of certain field data to understand the nature and rate of subject vehicle stalling due to ckp failures.gm and odi reviewed gm's warranty claims for the ckp with the objective of ascertaining an estimate of those claims representing an engine stall while driving.the ckp warranty claims without verbatim text were the largest segment of warranty claims.using those claims, gm surveyed vehicle owners to gather additional information to determine if the claim was associated with a stall while driving event.based on the survey, gm estimated that approximately 49% of all warranty repairs for the ckp involved a stall while driving.odi?s review of gm's survey data produced a higher estimate (71%) for stall while driving.gm further estimated the rate of stall while driving for the subject vehicles over time.it estimated stalling while driving rates of 1.6%, 4.6% and 8.9% at 1, 3 and 6 years in service respectively.odi's review of the gm's survey data finds higher estimated stall while driving rates of 2.2%, 6.8% and 13% at 1, 3 and 6 years in service respectively. Odi also conducted a survey of vehicle owners using consumer complaints reported to both odi and gm.the objective was to ascertain the potential safety consequences of an engine stall due to the alleged defect.with respect to the ability to restart the vehicle after a stall, 11% reported immediate restart, 69% reported delayed restart and 20% reported no restart.over half noted at least one engine stall incident at speeds in excess of 40mph. About one-third noted the vehicle was stranded either partially or fully in a lane of traffic after the engine stall.all of the consumers surveyed noted multiple stalling events prior to proper diagnosis and replacement of the ckp.based on gm's decision to conduct a safety recall, this investigation is closed.

EA06016

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.

PE04004