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5.6

fairly significant
Crashes / Fires:
0 / 0
Injuries / Deaths:
0 / 0
Average Mileage:
15,519 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.

2018 Chevrolet Suburban electrical problems

electrical problem

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2018 Chevrolet Suburban Owner Comments

problem #10

Nov 032023

Suburban

  • miles

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

The Trailor brake system, engine light, stabilitrak control system and antilock brake system is on due to the wiring of this vehicle.

- Cincinnati , OH, USA

problem #9

Oct 042023

Suburban

  • miles
TECHNICIAN - Was unable to perform test drive of vehicle. Inspected operation & found; Vehicle will not turn over, battery very weak. Removed battery, put on charger for approximately 45 minutes. Reinstalled battery. Vehicle had power but did not start. Was unable to get shifter into neutral. Found engine still not turning over. Found starter motor making clicking sounds. Got to turn over once but was very labored, but did not start. Disconnected shift cable at transmission and rolled vehicle into shop for diagnostic. - Scanned computer control modules & found; Approximately 30 codes total in multiple modules, with high and low voltage codes. - Inspected & found; Performed basic electrical faulty tracing. Performed battery test, voltage was low at 16%.Battery(new FY22) failed load test. Found starter making "thunking and clicking" sounds. Unable to move shift lever out of park position. Let battery charge an additional 1 hour and found battery failed testing. Tester states "short" which indicates internal failure. Tested starter draw, found excessive draw at 400amps, spec is 70-120amps. After testing tried to start. Engine turned over slowly for approximately 1 second and then made clicking sounds. Found body module voltage codes returned. Verified engine does turn over when manually turned with breaker bar. FURTHER SHIFT LOCK ISSUES OR OTHER ISSUES. Technician removed and replaced the starter assembly and the battery. Found engine started up and ran. Verified repair. Found shift lock still not working. Shifter will not leave the park position. Performed testing. Verified transmission will shift to drive and to reverse. Verified brake switch working properly and sending signal out to ABS module. Verified shift cable not frozen. Found no fault tracing available for this type of shift lock. Eliminated other possibilities which indicates the issue is with the shift lock actuator/gear shifter. Determined/Suspect; The shift lock actuator/gear shifter is faulty.

- Sunriver, OR, USA

problem #8

Aug 152023

Suburban

  • miles
While slowing down to make a left hand turn at an intersection, my vehicle suddenly lost power steering and the entire system completely shut down. There was no electronic function during that time. I had to put the vehicle in park, turn the key to the off position and then start it back up. It has happened multiple times, both at low speeds in drive and reverse. This would have caused a collision if there was oncoming traffic at the intersection at that time.

- Vilonia, AR, USA

problem #7

Mar 252023

Suburban

  • miles

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

While driving the vehicle lost all power and after about 20 seconds power came back on. The repair was the battery cables which was apparently very common on the make and model of vehicle. It's unsafe and can cause an accident and apparently happens on the majority of vehicles same year and make.

- Westley, CA, USA

problem #6

Nov 102022

Suburban

  • miles
Trailer Brake system Service Message Took it to the dealer service department and was told that a diagnostic would be needed to find problem $225, if the wiring harness is indeed defective it would be over $500 in parts and $600 in labor. A picture of the light coming on while driving was produced to the dealer service department. It first appear when driving on the freeway and we have never towed anything with this vehicle. Upon further online research we found out that this is a common and serious problem with GMC and Chevy vehicles like the Canyon, Sierra, Silverado, Yukon, Tahoe, Suburban, Colorado from years 2015-2020.

- Winters, CA, USA

problem #5

Dec 072022

Suburban

  • miles
Car has been at dealer 3 times for Wi-Fi issue. Mechanic took car home for longer drive to check. No found issues. Brought in for small noise that comes and goes. They Came back saying $10000 for cam shaft and lifters they are assuming.

- Stoughton, MA, USA

problem #4

Apr 302021

Suburban

  • 68,000 miles

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

My doors lock with the car with the keys in the car, my kids were in my car and I got locked out with my keys in it, there was a battery replacement done when I took my car in for a recall notice a month ago (maybe 2 months), also the lock button works but when I push the middle button it will not auto start, when I push the button on the handle outside the car door it will not unlock, & my car will tell me that my remote isn't detected when the keys are in the car. I was at home when it locked with my kids in the car I put them in the car and I walked around to the other side of the car and it locked that quickly in my driveway at home not even running not moving.

- Wasilla, AK, USA

problem #3

Dec 142020

Suburban

  • 30,000 miles
The stability track lights keeps coming on and off. Dealer can't seem to find out what the problem is. It does not leave a code in order to find out what the problem is. When the light comes on it affects the cruise control and steering assist. This occurs while driving the vehicle. It doesn't matter if you are on a city street or highway.

- New Iberia, LA, USA

problem #2

Mar 302020

Suburban

  • 19,875 miles
Car brakes on its own when going above 40 mph causing the vehicle to pull to one side.

- Woodbridge, VA, USA

problem #1

Feb 282019

Suburban

  • 37,311 miles
The contact owns a 2018 Chevrolet Suburban. While driving various speeds, the vehicle stalled. Afterwards, the "failure to open right door, roll window down, and put back up" warning indicator illuminated. The contact followed the instructions and the vehicle restarted. The contact mentioned that the failure occurred three times. The vehicle was taken to banner Chevrolet (5173, 5950 chef menteur hwy, new orleans, la 70126, (504) 302-8900) where it was diagnosed that the negative battery cable overheated, which caused the failure. The vehicle was repaired. The manufacturer was not made aware of the failure. The failure mileage was 37,311.

- New Orleans, LA, USA

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