Issue ID | 864409 |
Internal NHTSA # | 10407366 |
Manufacurer | GENERAL MOTORS LLC |
Brand | GMC |
Model | JIMMY |
Model Year | 1999 |
File date | 15/04/01 |
Component | PARKING BRAKE |
Product type code | VEHICLE |
Description of the problem | Drum in hat style parking brake 'wore out' after only about 18 months. The failure occurred incrementally during the period as the pedal gradually had to be depressed further and further to be effective. Dealer replaced only shoes under warranty. One year later, after the same gradual decline in performance mentioned above, the parking brake lost functionality again. Dealer claimed neglect on our part by leaving the brake engaged while driving even though the gradual nature of the failure could be considered evidence to the contrary. A cable adjustment was made which did restore partial functionality. Yet even though we employed judicious use of the brake from then on, the repair lasted only a few years. We have had no functionality for several years now believing that some flaw in the design made them non-repairable. Recently it has come to our attention that this brake system (drum in hat manufactured by trw) has had similar issues in other gmc products in which it has been employed and complaints have been filed (nhtsa item #1006115, service bulletin #020526001b for example). Also we discovered that an actual recall had been issued (nhtsa recall campaign #05v161000) apparently for the same trw brake system in the gmc sierra (model years 1999 thru 2005). Apparently it has been theorized that these brakes are failing because the shoes are not being adequately disengaged from the drum due to some defect in the return mechanism. We feel that the gradual nature of the failure, the service bulletins which target inadequate return spring tension, the variety of gmc models involved and finally our own (not provable) belief that the cause of these repeated failures is not from driving with the parking brake set warrant further investigation. Now that there is a proper fix available for this seemingly obvious defect, i intend to have it done. Thank you for your time. |
Vehicle Mileage at Failure | 20000 |
Number of Occurences | 1 |
Source of the issue | NHTSA WEB SITE |
City and State | EL PORTAL, CA |
VIN pattern | 1GKDT13W7X2XXXXXX |
Was vehicle invloved in a crash? | N |
Was vehicle involved in a fire? | N |
Was incedent reported to police? | N |
Was medical attention required? | |
Was part original equipment? | |
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Date of purchase | 02/07/24 |
Was original owner? | N |
Anti-lock brakes | N |
Cruise control | N |
Number of cylinders | 6 |
Drive train type | 4WD |
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