If you have a code such as P0597 on GM vehicles like Chevy, Buick, GMC, or Cadillac, a new thermostat could be causing that code. Today, we will explain how to diagnose and fix it.
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We will be using a Foxwell NT301 scanner to diagnose the issue, which can be used to delete codes from the engine computer, reset the engine light, and view live data with graphing.
After establishing communication with the engine computer, we found the code P0597, indicating a thermostat heater control circuit open.
To fix this issue, locate the thermostat in your vehicle. It is usually located towards the transmission side for four-cylinder and straight-six engines. For V6 and V8 engines, the location may vary, but it is important to look for the thermostat housing, which may also need to be replaced if it’s made of plastic and prone to cracking.
Inspect the wiring harness and ensure it’s plugged in properly. If the problem persists, consider replacing the thermostat and the thermostat housing. When performing this replacement, make sure the engine is completely cool, drain the coolant, and handle it carefully to avoid any spills or injuries.
After replacing the thermostat and the housing, reset the error code using the scanner and start the car to confirm if the issue has been resolved.
By following these steps, you can fix code P0597 on GM vehicles and save on costly repairs. For a detailed video tutorial, you can check our channel.
What does code P0597 mean on GM vehicles such as Chevy, Buick, GMC, or Cadillac?
Code P0597 indicates a thermostat heater control circuit open. It means there are problems with the thermostat. The video demonstrates how to diagnose and fix this issue.
What scanner is used for diagnosing GM vehicles in the video?
The video uses a Foxwell NT301 scanner, which can be used to delete codes from the engine computer, reset the engine light, and view live data with graphing.
Where is the thermostat located in GM vehicles?
The thermostat is typically located towards the transmission side in 4-cylinder and 3-cylinder engines. In most GM vehicles with V6 or V8 engines, the thermostat is located similarly, but the specific location may vary based on the engine orientation.
How can I replace the thermostat in a GM vehicle?
To replace the thermostat, ensure the engine is completely cool, drain the coolant, and replace the thermostat. Additionally, consider replacing the thermostat housing if it’s made of plastic and may develop cracks over time.