Over the years, various vehicles have had sticky brake pedals. When they are applied, they sometimes don’t return or there is difficulty in even applying them. A variety of causes can be the root of this problem. This issue of Photo Tech will discuss one General Motors-related vehicle that has actually had a recall on it to fix his problem. As many of us know, not all vehicles get back in for recalls. Essentially, this service is replacement of the entire pedal assembly, not installation of individual components. The individual components and disassembly of the brake-pedal assembly are shown only to provide a knowledge base for what’s causing the problem. Don’t try to rebuild these units. Don’t try to take them apart, hone out additional clearance on the bushings or insert any lubrication. They’re designed to be factory-installed and factory-lubricated. They’re not in-the-field service items.

In the automotive aftermarket, this is going to be a unit installation, rather than an individual component repair. You might think twice before going
to a scrapyard and buying a used-pedal assembly, as you’ll have no way of knowing whether it previously had a binding problem. Spending the amount of
labor and time and not have a new unit with known good bushings and cross-shaft pins could result in an expensive lesson.

The purpose of this Photo Tech is to alert you of the root cause of this problem. Please don’t try to lubricate the area by spraying any type of lubricant up underneath the dashboard. It may help for a short time, but because this problem can also be temperature-related, it’s not going to really solve the problem. Thinking that you have done some good by attempting to lubricate the unit while it was assembled in the vehicle is a fallacy. You’ll be doing a real disservice that could cause an overheated brake system and potentially, a loss of braking effectiveness.