Chevrolet Blazer knocking problems

Filed Mar 18, 2026 · Engine, Transmission · IN

I was driving to work as I normally do and work is only 15 miles away from home I get to work turn into the parking lot stop to scan my badge and I hear knocking noise I thought it was coming from the truck in front of me but after he moved on I still heard the noise and I found a parking spot as soon as I could and the engine light on the dash came on and the motor that was knocking is definitely my Blazer with only 11,222 miles on it. I always keep up on my vehicles maintenance in fact I just had the oil changed at Ray Skillman Gm Dealership2/16/26 it had 10,960 miles on it. Before that I had the oil changed at Ray Skillman 08/20/25 it had 7,720 miles on it then and before that. The very first oil change 22/ may /25 the mileage was 5,354 on it was at Hare Chevrolet where I purchased this Blazer RS Brand new it had 34 miles I always get the oil changed when it gets to 25%

Filed Jun 29, 2025 · Brakes · LA

My 2021 Chevrolet Blazer experienced brake failure while driving, without any warning lights or diagnostic alerts from the vehicle’s onboard system prior to. This created a very dangerous situation for myself and others on the road, including my family who was in the car as well. Prior to this incident, I brought the vehicle to the dealership not long after purchasing it because I was constantly hearing screeching noises when braking. I thought it was rather soon to need new brakes, considering I purchased the vehicle brand new, but the issue was dismissed without any further inspection. This most definitely resulted in a missed opportunity to diagnose what is seemingly a more well known mechanical failure common among GM manufactured parts. After the brake failure, service technicians discovered that the vacuum pump had failed, causing the brakes to fail which led to engine damage by projecting shrapnel into the engine. This has rendered a $35,000 car purchase useless after 4 years of use without a $10,000 repair. I find this highly unethical. Upon further investigation, I learned that GM has previously acknowledged vacuum pump failures in several vehicles manufactured between 2014–2018 and even recalled certain models. The 2021 Chevy Blazer should be included in the list because failures of this part can lead to harm, injury, or loss of life. The documented defects in older GM models is consistent with my experience. I got oil changes and service regularly. The dealership should not have been so quick to dismiss the the brakes, knowing the history of these parts and the warning signs. This issue should be taken seriously as it is likely more widespread and is a ticking time bomb. Loss of life should not be the catalyst to trigger action in this situation. Other consumers are likely at risk without knowing it.

Filed Oct 20, 2014 · Electrical · KY

As of october 20,2014 I have yet to see the 1999 chevorlet s_10 ls or the 2005 chevorlet blazer s-t 4x4 my husband has tested both of these ignition switches and they are the same. He then called a gm dealership and they told him to not put anything heavy on the key ring. We are getting the same spill from gm as everyone else.why hasn't the s-10's and blazers been inspected, they have the same ignition switch from the 1999 s-10 to the 2005 blazer 4x4 and are very easy to knock in to accessory position. Because there has been no information put out about our ignition switches, we are highly concerned about the airbags as well. Why have these vehicles been overlooked not inspected and silenced? Noone has said the s10 or the blazers ignition switches are safe. There is absolutely no questions in our mind that the ignition switches are the same as all the recalled vehicles and faulty and possibly the air bags as well. Please,please look into this I have a daughter coming of driving age and we need to know our vehicles are safe for her to even step in.

Filed Mar 21, 2014 · Electrical, Lights · 170,000 miles · IN

I was going through a roundabout and put my right turning signal on and the vehicle shut off. I was able turn my hazard lights on and pull over. After putting it in park it did start. After that I parked it at a gas station turned it off went to leave and the SUV would not start. I took the steering column cover off and starting knocking on things and I was able to get it started. I later found that it was a wiring harness that failed. It was replaced after that everything ran great.

Filed Jun 6, 2011 · Lights · 158,000 miles · VA

Tl*the contact owns a 2000 chevrolet blazer. The contact stated there was a ticking sound coming in the glove compartment. The vehicle was taken to a local mechanic who inspected the vehicle and found a failure within the multi-function switch. The contact stated that the federal safety agency recall campaign id number, 08v231000, exterior lighting brake lights switch was related to the failure. The manufacturer was contacted but stated that the vehicle was not included in the recall. The contact will be responsible for the repair cost. The failure mileage was 158,000. Updated 07/15/11

Filed Apr 3, 2008 · Lights · IN

The multifunction switch has malfunctioned and caused a ticking under the dashboard.

Filed Dec 21, 2004 · Suspension · MO

While driving 30 MPH, the consumer heard a loud knocking noise coming from the front of the vehicle. The vehicle vibrated uncontrollably. *jb the consumer stated that she knew of another consumer with the same make and model that have experienced the same problem. *sc

Filed Jun 13, 2004 · Transmission · 70 miles · FL

Transmission pump failure 69,800 miles cost at ammco transmission $1639.00. Leak out of side of transmission could have cuased fire if I did not see leak.gas gauge also does not register correctly.I never now when I am out of gas.knock in passenger side firewall a problem.seat lever broken for second time.the oly good thing about this car is I have 70,000 miles on the brake pads.but tomarrow I may need a master cylinder the ways things are going.back rear window release lever failure cost me $300.00 to fix. I really feel that chevy should have not built this vehicle at all. They knew the problems and continued not to fix these problems.I feel the should have fixed the gas gauge problem and helped with the cost of the transmission repair.this is my last gm vehicle so I guest it doesn't matter. I looked at a chevy equinox and was concidering it. But unless they give me a 100,000 mile bumper to bumper warranty I will buy a toyota or nissan. At least they know how to build good transmissions!!!!

Filed Jul 24, 2003 · Suspension, Visibility · 50,000 miles · CO

Two things: 1. Consistant knocking noise in front end. Had it fixed while under warranty, but it continued at a later date. 2. Windshield wiper motor malfunction. Windshield wipers at times will not turn off making driving in snow or rain dangerous.

Filed Jul 2, 2003 · Brakes · LA

While applying the brakes vehicle will skid and make a knocking noise coming from driver's side tire. Abs braking system light appeared on the dashboard.