2005 Chevrolet Silverado 1500

Recently replaced o2 Sensor and cleared check engine status. I failed the state emissions test because the Cat indicates inc or not ready,(catalytic converter). The procedure to clear this condition is dangerous and unreasonable. It calls for accelerating to 55MPH or higher for 2-3 minutes then decelerating to 20 MPH, not using brakes, and travel for 2 minutes then accelerating back to 55MPH, repeating this process up to 5 cycles to clear the CAT status. Given the drive speed this procedure would have to be done on a highway and could very likely cause a collision. This is very hazardous and should not be a requirement to complete vehicle inspection.

Design flaw - Brake light switch- the end section of the internal spring is placed in a position that allows it to potentially slide down and block the space needed for when the plunger is depressed, jamming up the switches ability to properly function. I have not determined what happened to the switch on my truck, but noticed that this scenario was a possibility and felt obligated to report my opinion.

Well, I contacted GM years ago asking why the frames on these vehicles rot out so fast. They told me to send pics. and that’s all that came from that. So, years ago, I heard a banging noise in the right rear side of my truck. My rear shock mount rotted out and driving home later there was even more noise. The left rear shock mount rotted out also. I removed the bed to assess damage, and I couldn’t believe the amount of rust I was looking at. I bought an aftermarket kit and had the shock mounts welded back on. The company selling the kit said that they sell tons of those kits. I would say that’s a safety issue. Especially when the whole from appears to be rotting away. That seems like a mayor issue to me. I probably won’t be buying another Chevy truck seeing how my wife’s Honda is as old as my truck and has no rust under it.

As I approached an intersection to make a left-hand turn, I stepped on my trucks brake pedal. I experienced a complete loss of braking power, with the trucks brake pedal going straight to the floor, after an instant of a firm, solid pedal. Pumped the pedal to try to regain brake operation to no avail. No hydraulic pressure was present. No warning lights or other indications of brake system failure occurred. Truck was driven home a very short distance using e-brake. Brake fluid was seen dripping from the rear axle area in large amounts. Truck was towed to my local garage which found a burst steel brake line at the junction with the rear hydraulic flex hose. Other brake lines were heavily rusted. Rest of the undercarriage was not similarly rust like the brake lines. The garage stated this was not the first Silverado they saw with this problem. All steel lines were replaced with stainless steel lines, and as a precaution we replaced all brake hoses as well. The bleeder screws on the front disk brake calipers, and on the rear wheel cylinders were also found heavily rusted and frozen, so those components were replaced as well. The shop stated this issue of severe corrosion of brake lines and bleeders is very common on this generation of Silverado’s . They have repaired quite a few like mine after similar brake failures. If you research the issue on-line, there certainly is a problem with these trucks. In my 45 years as a mechanic and practicing mechanical engineer, I have never seen brake system components so severely corroded as the ones removed from my truck. I was lucky I wasn’t towing anything, or was at highway speed when the failure occurred. The next owner may not be that lucky if it happens to them.

The contact owns a 2005 Chevrolet Silverado 1500. The contact stated while driving at various speeds, the vehicle started to leak fuel and the brake line would leak causing the brakes to lose power whenever the brake pedal was depressed. The contact also stated that the fuel tank strap fractured due to rust causing the fuel tank to detach from the vehicle. The contact stated that the rear leaf spring fractured due to rust as well. The contact also stated that the entire sub-frame of the vehicle was rusted causing pieces of metal to fall off from the frame while driving. The brake warning light was illuminated. The vehicle was taken to an independent mechanic to be diagnosed. The contact was informed that the brake lines, fuel lines, the rear leaf shackle, and the fuel tank needed to be replaced. The vehicle was repaired. The manufacturer had not been informed of the failure. The failure mileage was approximately 58,000.