Need Help with My 2019 Chevy Blazer Thermostat!

Maintenance and Repairs
1

Hey folks,

I’m reaching out because I’ve been having some issues with the thermostat in my 2019 Chevy Blazer, and I’m hoping to tap into the collective wisdom of this forum.

What’s Going On?

Lately, I’ve noticed that my Blazer’s temperature gauge has been acting a bit erratically. Sometimes it seems like it’s running cooler than normal, and other times, it shoots up into the red zone. I’m concerned that it might be a thermostat issue, but I’m not entirely sure.

What I’ve Tried

I’ve done some basic troubleshooting:

  • Checked the coolant levels - they seem fine.
  • Looked for leaks - haven’t seen any drips or puddles.
  • Changed the oil - it was due anyway, but no difference in temperature.

Seeking Advice

  1. Has anyone else experienced thermostat issues with their 2019 Blazer? What did you do to resolve it?
  2. Is there a way to test the thermostat before deciding to replace it?
  3. If replacement is the way to go, does anyone have recommendations on whether to go with OEM parts or aftermarket options?

Miscellaneous Tips

  • I’d love any maintenance tips that could help prevent future issues.
  • Also, feel free to share any specs that could be useful for my model.

Thanks in advance for any help you can provide! Looking forward to hearing your experiences and advice!

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2

If your 2019 Chevy Blazer is overheating, that can definitely indicate a failing thermostat. It could be stuck closed, not allowing coolant to flow properly. Check the temperature gauge while driving and see if it fluctuates significantly!

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3

Great point! I noticed my temperature gauge jumping around before my thermostat failed. It’s quite alarming to see those readings fluctuate while driving!

4

In addition to overheating, listen for any unusual engine noises when driving, like gurgling or boiling sounds. That could be coolant boiling over because of a malfunctioning thermostat, especially if the engine temperature is high.

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5

I’ve had issues with my thermostat as well. It got stuck open once, which caused my engine to run too cold. If you’re seeing lower temperature readings than usual, that might be something to consider too!

6

That’s an important point! A stuck open thermostat can lead to poor engine performance and decreased fuel efficiency. It’s all interconnected!

7

I’m sorry you’re facing this issue. It’s frustrating when your vehicle isn’t behaving normally. Don’t hesitate to reach out for help! My Blazer had some overheating issues—turns out it was just the thermostat needing replacement.

8

Thanks for your encouragement! It’s nice to know others have been through this and made it out okay. Keeping positive vibes going while we troubleshoot!

9

Also, consider the age of your vehicle. Even though it’s a 2019, components can fail prematurely. A friend of mine had a similar issue. Have you checked if there are any recalls or service bulletins?

10

Great suggestion! I hadn’t thought about recalls yet. Maybe I should look into that and see if any repairs are covered. Thanks for the tip!

11

If it’s not the thermostat, other cooling system components may be to blame, like a bad water pump. Have you had your coolant levels checked?

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12

I checked the coolant levels, and they seem fine, but I’ll investigate other components. Just trying to cover all bases!

13

I can’t help but chuckle at how cars can act like they’re having a meltdown sometimes! Just remember, the thermostat may be a small part, but it can cause big headaches if it goes rogue.

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Haha, that’s so true! They have their own way of making us worry. But I’ll get to the bottom of this, one way or another!

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15

Hey! Replacing the thermostat in a 2019 Chevy Blazer is a straightforward process. You’ll need a socket set, a torque wrench, a gasket scraper, and some antifreeze. Make sure you also have safety glasses and gloves on hand! It’s usually a 1-2 hour job.

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16

Yes, draining the coolant is necessary to avoid spills and ensure a clean job. Typically, you want to drain it first, then replace the thermostat. Don’t forget to have a pan ready to collect coolant!

17

Good point! Is it safe to try this myself, or should I consider a mechanic instead if I’m a beginner?

18

It’s definitely doable as a beginner if you follow the steps carefully! Just take your time and double-check everything. Consider watching a couple of YouTube tutorials for better guidance too.

19

Exactly! I always find it helpful to write down the steps before starting. Any tips on what to clean with after the job?

20

I recommend using a rag with some engine degreaser to clean the surface after removing the old thermostat. Ensure that the area is spotless before installing the new one to prevent leaks.