pretty bad
Typical Repair Cost:
Average Mileage:
40,250 miles
Total Complaints:
6 complaints

Most common solutions:

  1. not sure (2 reports)
  2. replace water pump (2 reports)
  3. replace elbow to water pump (1 reports)
  4. replace thermostat housing (1 reports)
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This problem may be covered under warranty. Ask your Chevrolet dealer.

problem #6

Nov 142017

Sonic LT 1.4L Turbo

  • Automatic transmission
  • 66,500 miles

Third time having a cooling system issue with my Sonic in four years of owning the vehicle.

Update from Aug 30, 2021: **CORRECTION mileage was 49,000 on the odometer.

- aware_nightmare, Omaha, US

problem #5

Jul 012015

Sonic LT 1.4L Turbo

  • Automatic transmission
  • 29,000 miles

Second time replacing the water pump due to a leak within the first two years of owning the vehicle.

- aware_nightmare, Omaha, US

problem #4

Apr 152014

Sonic LT 1.4L Turbo

  • Automatic transmission
  • 15,000 miles

Bought my Sonic brand new off the lot and already was 1 month short of the lemon law in my state covering the fact that I had to replace the water pump and had an oil pan leak the first year of owning the vehicle.

- aware_nightmare, Omaha, US

problem #3

Mar 262019

Sonic LT 1.4L Turbo

  • Automatic transmission
  • 71,028 miles

After finding yet another coolant leak on the Sonic, the fourth in two years, it was found that this time the thermostat housing had cracked. A replacement, including coolant and labor cost $378.45. Previously the thermostat housing gasket had been replaced by the dealer for leaking, causing a no heat condition the previous winter.

- Frank C., East Haven, CT, US

problem #2

May 062019

Sonic LS

  • Automatic transmission
  • 26,000 miles

First my coolant was leaking. Then a week later I noticed oil leaking. It was the oil pan gasket. Then also the crank seal was leaking ..... 3 leaks within a week.

- Tom E., Saginaw, US

problem #1

Jan 142014

Sonic LT 1.8L

  • Automatic transmission
  • 33,700 miles

My engine( check light) never notified me when my car was leaking radiator fluid. This could of blown my engine and maybe started a fire putting my family in danger and others. If it wasn’t for the vapor coming out from my hood I won’t even have noticed until something bad happened.

- bryansonic, Avenal, CA, US