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I’m pretty new to the forum, so please excuse this if it’s already been mentioned.
I’m a newish driver and new truck owner, my Silverado is actually my first car. My grandfather used to be a mechanic so he’s been teaching me things here and there, but he’s stumped on this and even after all the reading I’ve done, so am I.
Since the day I bought my truck, about 6 months ago to be exact, I’ve felt this bounce within my brake pedal when stopping, typically from 30MPH and up. At times it can be so bad it will throw me forward. My steering wheel doesn’t shake, nor do I feel any stuttering anywhere other than my brake pedal. It doesn’t happen all the time, and at times it’s MUCH worse than others. I do notice it is more likely to happen if my tires are hot or it’s extremely humid outside.
I don’t think my rotors are warped nor do I think my brake pads are thin as I can stop completely smooth at times. I tested it by going from 56mph and quickly hard braking while on pavement and coceana, and I didn’t have a problem (because I had only been driving 10 minutes and my tires were still cold I assume).
I’m pretty stumped, hopefully one of you guys will know? Thanks in advance.
Edit: truck is a 2015 Silverado 1500 LTZ Z71 V8 5.3L with 149k miles and is a Canadian model
By Pyro In Tampa
I just purchased a 2019 Silverado 1500 Custom Crew Cab 2 weeks ago. They towed it back to the dealer this morning. I tried to drive it to work yesterday and the parking brake would not release. A tow driver came out yesterday, and he got it to release (while I was at work using another car). then I received two e-mails from On Star. One said a problem was detected with the Stabilitrack Stability Traction System. The second said a problem was detected with the anti-lock brake system, and I needed to get the truck serviced within 7 days. Since I didn't feel safe driving it there, I called GM's Roadside Assistance and had it towed back to the dealer today. According to the tow truck driver, the 2019 Silverado has a new electronic brake system they (GM) haven't used before. He said he's been towing a LOT of cars and trucks lately that have this new electronic brake system. I went to the dealership to get a loaner truck, and I asked them about the new system. The advisor there confirmed that there is a new brake system on the 2019 trucks, and they are having issues with it. (That would have been good to know before I bought it 2 weeks ago!) He told me they have parts and they have software upgrades to fix it, but it's going to be at least two days before he can even get it in the shop. We're a GM family and we've owned lots of brand new GM cars, but this is our first pickup truck. Has anyone else had this same issue? If so, were they able to resolve it successfully? I don't want to be in and out of the dealership every other week getting stuff fixed now. This is really disheartening.
Contributing Writer, GM-Trucks.com
General Motors has announced that NHTSA is mandating a safety recall for the following vehicles:
2014-2018 Chevrolet Silverado and GMC Sierra Pickups (1500 / 2500 / 3500) 2015-2018 Chevrolet Suburban, Tahoe, GMC Yukon vehicles 2015-2017 Cadillac Escalade
NHTSA reports that the amount of vacuum created by the vacuum pump may decrease over time. The group says that as the vacuum level drops, the brake assist decreases, and that this increasing braking effort, extending the distance required to stop the vehicle, thereby increasing the risk of a crash. This new recall covers 3.4 million vehicles.
The Problem: The brake pump uses engine oil to lubricate itself. If the pump becomes clogged with engine oil sludge the units ability to create vaccum is diminished over time. As a result, braking force and ability also drops. The issue is usually accompanied by a "Service Brake Assist" warning message in the dash.
The Fix: GM will reprogram the computer that controls the secondary brake assist pump. The secondary pump will now activate at lower speeds and different situations quicker to compensate for any lost output from the main pump. Since the pumps are not failing, GM has decided not to replace them.
GM's number for this recall is N192268490. In compliance with federal law, GM will notify owners, typically by snail mail. GM says that its dealers will reprogram the Electronic Brake Control Module. However, GM has not yet provided a notification schedule. Owners may contact Chevrolet customer service at 1-800-630-2438, Cadillac customer service at 1-800-458-8006 or GMC customer service at 1-800-462-8782.
If you own one of these vehicles and wish to check to see if your vehicle is included (or not) you can do so at this link immediately.
As with every safety recall, customers will not be charged by GM for the needed repairs or modifications.
NHTSA's public information on this issue indicates that many accidents have been reported to NHTSA including some with injuries. This recall is the result of a NHTSA investigation that lasted nearly a year. In its investigation report, NHTSA noted the following details about the problem:
Hey folks, first time posting here and maybe it’s a common thing. I’ve searched google and YouTube for days, replaced parts, and done the troubleshooting I know to do. So here it is, bear in mind, im no auto mechanic. I’m a jet mechanic/toolmaker. Lol
my front pass brake locked up Friday, and the abs/parking brake light has been on since the dealer I got the truck from replaced the parking brake cable. I don’t hear a roaring, so I don’t feel like it’s a hub, but I do have some bouncing on the front end which leads me to think it may be an axel, which I still have to get looked at.
parking brake and abs lights come on after a few seconds of driving, I hear brakes grinding, and I just replaced both front rotors, pads, and passenger caliper and abs sensor after it locked up; since it melted the abs sensor cable.
brakes are bled properly and working, but they aren’t fully releasing. I’ve checked fluid, it’s not overfilled. Driver hub was previously replaced but not passenger for some reason. I considered ordering a hub for the passenger side just for that. Rotors are 305mm and the pads I installed are ceramic from brake best. Yes, the rotors get hot after a short drive, like too hot to touch. I’d rather not have these things lock up on me again. The only thing left I know to check are the piston in the master cylinder, or the passenger hub.
Any ideas? If I’ve missed good reference material or prior posts please feel free to comment with a link and a nice “check here dumbass.” Lol
thanks in advance.
I have recently noticed when I apply my brakes on my 2500 HD my truck pulls to the left and steering wheel shutters. The brakes should be good, don't have that many miles on them. It happens when I hit the brakes quick. If I gradually put them on it doesn't do it.
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