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10.0

really awful
Crashes / Fires:
0 / 0
Injuries / Deaths:
1 / 0
Average Mileage:
6,134 miles

About These NHTSA Complaints:

This data is from the NHTSA — the US gov't agency tasked with vehicle safety. Complaints are spread across multiple & redundant categories, & are not organized by problem.

So how do you find out what problems are occurring? For this NHTSA complaint data, the only way is to read through the comments below. Any duplicates or errors? It's not us.

2020 Chevrolet Blazer drivetrain problems

drivetrain problem

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2020 Chevrolet Blazer Owner Comments (Page 1 of 2)

problem #29

Nov 212024

Blazer

  • miles

A D V E R T I S E M E N T S

Questions Answered Below: What component or system failed or malfunctioned, and is it available for inspection upon request" The vehicle is at a GM Dealership now and is available for inspection. I have not authorized repairs as of yet. I am being told by the dealership: The ball joint on the control arm on the left side seized snapping the axle shaft - causing the tire to to turn out. The dealership has suggested: Mechanical repair costs $1,850, Plus an additional $2,000 due to wheel well damage caused by the failure. Has the problem been reproduced or confirmed by a dealer or independent service center? I am being told by the dealership: The ball joint on the control arm on the left side seized snapping the axle shaft - causing the tire to to turn out. How was your safety or the safety of others put at risk? Due to my slow speed turning out of the parking lot ~10 mph - the vehicle came to a sudden halt. However, had this occurred while driving any faster - it would have been very dangerous and put myself and others at significant risk. Has the vehicle or component been inspected by the manufacturer, police, insurance representatives or others? It was towed by AAA and has been inspected by the GM Dealership. That is the only inspection thus far. Were there any warning lamps, messages or other symptoms of the problem prior to the failure, and when did they first appear" Earlier in the day while pulling out of a parking spot and turning the wheel to the left I thought I felt some type of resistance then it went away as I started driving. No other symptoms or warning prior to the failure.

- Rochester, MI, USA

problem #28

Nov 142024

Blazer

  • miles
P0128 code- Assisted steering fault Check engine light Ac blowing cold Temp gauge flat lined Need to replace temp sensor and thermostat. Others with this issue have reported steering can completely lock up, which could cause serious accidents which could result in fatalities.

- Circleville , OH, USA

problem #27

Nov 022024

Blazer

  • miles
I am getting the message "Shift to Park" displayed while vehicle in park after turning the vehicle off. Looking online, it seems to be a common issue with Blazers as well as other GM vehicles. I found online that "the cause of the condition may be that the park switch in the transmission control (shifter) assembly is not pulling the BCM signal low to electronically show that the vehicle is in the Park position." If this is such a common issue on similar vehicle to mine since 2018 it appears, why is this not a Recall already?!

- Linden, MI, USA

problem #26

Oct 282024

Blazer

  • miles

A D V E R T I S E M E N T S

When you shift it into park, it often doesn-??t recognize that it-??s in park and begins to roll backwards. This doesn-??t happen every single time but at least twice a week and I have to use the parking break.

- Dexter, MI, USA

problem #25

Sep 242024

Blazer

  • miles
2020 Chevy Blazer - Shift to Park while Gear is already in Park: While putting the gear in park, the warning chime to shift it into park is initiated. It has happened 3 to 4 times in the past three days. I took the vehicle to the Local Chevy Dealership. The Service Team/Dept. diagnosed that the Transmission Shifter Unit Assembly must be replaced. The 2019 Chevy Blazer had these issues which prompted a TSB/Recall however it wasn't extended to the 2020-year models and Chevy Dealership refused to include it as a warranted repair which just passed 44,000 miles. This is a safety issue, and it should be replaced without additional cost to customer as this issue was already identified as a safety concern in 2019, however Chevy does not want to identify the issue as a covered repair per the manufactures warranty.

- Murfreesboro, TN, USA

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problem #24

Sep 102024

Blazer

  • 50,000 miles
The contact owns a 2020 Chevrolet Blazer. The contact stated that upon arriving at his destination, the vehicle failed to detect that the gear shifter was in park(P), preventing the vehicle from being turned off. The contact stated that the message "Please Shift to Park" was displayed. There were no warning lights illuminated. The vehicle was not taken to the dealer or an independent mechanic. The vehicle was not repaired. The manufacturer was not notified of the failure. The failure mileage was 50,000.

- Manchester, IA, USA

problem #23

Aug 152024

Blazer

  • 49,000 miles

A D V E R T I S E M E N T S

The contact owns a 2020 Chevrolet Blazer. The contact stated while the vehicle was parked in the driveway, the vehicle hesitated. The contact stated that while attempting to turn off the vehicle, the vehicle independently shifted out of gear. The vehicle was driven to the local dealer to be diagnosed. The dealer determined that the failure was a power train failure. The vehicle was not repaired. The manufacturer was notified on the failure. The approximate failure mileage was 49,000.

- Houston, TX, USA

problem #22

Sep 112024

Blazer

  • miles
2020 Chevy Blazer- bad transmission at 130,000 miles

- Leesville, SC, USA

problem #21

Aug 212024

Blazer

  • miles
My shift to park comes on although the vehicle is parked My steering is reduced came on today this is a problem in mutiple forms in regards to chevy blazers

- Shelton , CT, USA

problem #20

Aug 052024

Blazer

  • miles
When I put the car in park it does not register and will not come out of accessory more. This is a known issue and gm is making customers out of warranty pay for

- Titusville, FL, USA

problem #19

Nov 092023

Blazer

  • miles

A D V E R T I S E M E N T S

When placed in park the DIC will intermittenly indicate "Shift To Park". At that point, I am not certain whether or not the vehicle is in park. It will often go into accessory mode when this happens. I cannot turn the vehicle completely off at this point. I need to shift it from park to reverse or drive and then back into park. It may take several attempts for it to register that the vehicle is actually in park. The problem is occurring more and more frequently over time. I am about to take it to the dealer for repairs. I believe this is a common problem with many GM vehicles and they ought to fix it under a recall notice.

- Plymouth, MI, USA

problem #18

May 032023

Blazer

  • 8,000 miles
The contact's wife owns a 2020 Chevrolet Blazer. The contact stated that on several occasions when the vehicle was shifted to park(P), the message -??Shift to Park-?? was displayed. The vehicle was not taken to be diagnosed or repaired. The manufacturer was notified of the failure. The failure mileage was approximately 8,000.

- Las Vegas, NV, USA

problem #17

Apr 222024

Blazer

  • miles
Intermittent Shift to Park Message Displayed While Vehicle in Park. I am seeing an intermittent Shift to Park message when the vehicle has been shifted into Park, and the ignition has been turned to the Off position. My car model is a push-to-start/stop ignition type and this issue prevents me from turning off the car at times. I am having the vehicle serviced currently at my local chevrolet dealership but being subject to a diagnostic fee of $175. A message shows up on the instrument cluster screen stating "Shift to Park, " however, the shifter is already in the Park position. Potential cause: The cause of the condition may be that the park switch in the transmission control (shifter) assembly is not pulling the BCM signal low to electronically show that the vehicle is in the Park position.

- Phoenixville, PA, USA

problem #16

Apr 302024

Blazer

  • miles
This vehicle is currently on its third radiator since it was purchased, 4 years ago. That-??s almost 1 radiator per year. The vehicle also has transmission issues on the highway. The dealer replaced the torque converter but vehicle is still hesitant and bucking on the highway. This vehicle only has 64,000 KM and would cost thousands in repairs if it wasn-??t under warranty.

- Cbs , AL, USA

problem #15

Apr 032024

Blazer

  • miles
Steering assist reduced warning came on as I was driving. Electric steering module has gone bad.Temp gage and AC stopped working as well. No accident yet but this is a KNOWN SAFETY DEFECT that needs to have a recall. The steering wheel could lock up. Force GM to recall this vechile before people die!!

- Mesa, AZ, USA

problem #14

Mar 132024

Blazer

  • miles
Transmission issue, computer repair, constant issues.

- Eastpointe, MI, USA

problem #13

Feb 072024

Blazer

  • miles
As I was driving, my engine coolant temperature gauge went from normal level down all the way pegged to C. Message appears on my dashboard "Steering Assist is Reduced. Drive with Care". Also, radiator fan continuously runs as if the air conditioner was turned on, which it was not. After searching the internet and confirmed by dealerships and the shop I had my car repaired, this same issue with the coolant temp sensor and thermostat is a very common occurrence on these generation Chevy Blazers. It just amazes me and disappoints me that this type of failure on a car happens as soon as 70,000 miles. Should last for much much longer before this type of failure happens.

- Linden, MI, USA

problem #12

Mar 012023

Blazer

  • miles
Transmission skips while driving, there-??s some sort of glitch with the electrical that causes the steering assist to shut down and the fan to over work, like it would if it were over heating but the temp of normal.

- Ontario, CA, USA

problem #11

Mar 152023

Blazer

  • 65,000 miles
The contact owns a 2020 Chevrolet Blazer. The contact stated that while the vehicle was shifted into reverse, the vehicle failed to respond as intended. The vehicle was not diagnosed or repaired. The manufacturer was not notified of the failure. The failure mileage was 65,000.

- Loris, SC, USA

problem #10

Jul 012023

Blazer

  • miles
Unknown car will not shift into park without me having to re-shift to park and then the vehicle will shut off after re-shifting.

- Pheba, MS, USA

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