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 Oct 2, 2026
41 of the 186 complaints on this car are about the engine. 25 of those describe overheating.
Tick what matches of 25 reports
Overheating on other Blazer years
Report counts are for each model year on its own, so a newer car has had less time to collect them. Model years with too few reports of it for a sheet: 2021.
What this problem usually is
Most owners in this group notice the coolant before they notice the heat: a reservoir that keeps dropping, a sweet smell, or a bright puddle under the front of the car. Across the vehicles on this site, about four in five of these complaints mention coolant, a leak or a puddle, and roughly two in five mention the temperature gauge or overheating.
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 Oct 2, 2026.
NHTSA investigations into the engine on the Blazer
Engine compartment fires. Closed jul 31, 1996.
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.
When it happens
The middle half of failures fell between 35,000 and 59,945 miles, from the 8 reports that gave a mileage.
Is this a known problem?
The manufacturer has sent NHTSA 5 service bulletins or notices for the 2019 Chevrolet Blazer that deal with this problem. Newest first.
Federal rules make a manufacturer send NHTSA a copy of any notice about a defect that goes to more than one dealer or owner. Most of these are service bulletins, the repair instructions manufacturers send to dealers. NHTSA generally leaves safety recall bulletins out of this file, and recalls are listed separately.
This service bulletin provides a repair procedure to correct a customer concern of Coolant and/or Oil Leak, Malfunction Indicator Lamp (MIL) Illuminatedâ.
This Preliminary Information communication provides information to the technician on the steps to diagnose and repair vehicles that may have oil mixed in with the engine coolant.
This service bulletin provides diagnostic information for the technician regarding a customer concern of engine overheating, cooling system contaminated with engine oil.
This Preliminary information communicates a possible noise from the water pump causing a DTC and the diagnostics for the repair.
1 more on the 2019 Chevrolet Blazer page.
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. How reports land on this sheet.
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