2019 Chevrolet Blazer · symptom sheet

Engine overheats or leaks coolant

25owner reports
47,500median miles
$800median quote
0involved a crash

Newest report Aug 27, 2026 · checked Sep 19, 2026

41 of the 186 complaints on this car are about the engine. 25 of those describe overheating. Only stalling is reported more often on this car.

Tick what matches of 25 reports

the temperature gauge climbed into the red

coolant is disappearing or on the ground

the heater stopped blowing hot

What got replaced

Owners who name the part that was replaced mention the thermostat (21 reports) and the radiator (5 reports).

Recalls and investigations

No recall on the engine covers the 2019 model year as of Sep 19, 2026.

NHTSA investigations into the engine on the Blazer

EA94-029opened Jul 29, 1994

Engine And Engine Cooling · model years 1989 to 1993

Engine compartment fires. Closed jul 31, 1996.

NHTSA summary

AN ALLEGED MALFUNCTION IN THE ATLERNATOR RESULTING IN ENGINE COMPARTMET FIRES.

None of these investigations covers the 2019 model year.

What owners paid

5 of the 25 reports quote a price. Each dot is one quote. The middle half runs $800 to $1,000.

$800$800$1,000

$0k$2k$4k$6k$8k

When it happens

The middle half of failures fell between 35,000 and 59,945 miles, from the 8 reports that gave a mileage.

123

324

1325

826

What owners wrote

“Thermostat went bad at 47,500 miles. Temp gauge stopped working, Engine light came on and alert stating steering assist is reduced”
Filed Aug 18, 2026 · 47,500 miles

“The thermostat has been sticking, and needs to be replaced after only 30,000 miles.”
Filed Feb 2, 2026 · 30,000 miles

“Engine temperature gauge is not working. Dash is displaying driver assist issue and steering intermittently locks up while moving. Air conditioning does not work and cooling fan is running at high speed. Thermostat and coolant temperature sensor need to be replaced. Such a high number of these vehicles are failing that i canât even get factory parts”
Filed Oct 19, 2025

“Diagnosed as a bad thermostat. AC not working. Steering assist issue. Temp gage not working. Car is out of warranty.”
Filed Jun 22, 2025

Should you keep driving it?

This page can't tell you that. 0 of 25 reports involved a crash. Owners who file are the ones who had a bad experience, and nobody checks their reports. If the problem affects steering, braking, power or a fire risk, treat it as a safety fault and have it inspected before a long or high-speed drive.

File your own report with NHTSA. Complaint counts are how a problem gets an investigation.