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P1574 GMC Code - Stop Lamp Switch Circuit

- Code Popularity: 12,324 Views
- Repair Importance Level: 3/3
- Repair Difficulty Level: 2/3
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What are the Possible Causes of the DTC P1574 GMC?

NOTE: The causes shown may not be a complete list of all potential problems, and it is possible that there may be other causes.
  • Stop Lamp Switch out of adjustment
  • Faulty Stop Lamp Switch
  • Stop Lamp Switch harness is open or shorted
  • Stop Lamp Switch circuit poor electrical connection
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How to Fix the DTC P1574 GMC?

Review the 'Possible Causes' mentioned above and visually examine the corresponding wiring harness and connectors. Ensure to check for any damaged components and inspect the connector pins for signs of being broken, bent, pushed out, or corroded.

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What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P1574 GMC code, it typically requires 1.0 hour of labor. The specific diagnosis time and labor rates at auto repair shops can differ based on factors such as the location, make and model of the vehicle, and even the engine type. It is common for most auto repair shops to charge between $75 and $150 per hour.

When is the Code Detected?

The Powertrain Control Module (PCM) does not detect a stop lamp switch transition

What are Code Possible Symptoms?

  • Engine Light ON (or Service Engine Soon Warning Light)

Code P1574 GMC Description

This diagnostic test functions on the assumption that a sudden decrease in vehicle speed is caused by a brake pedal application. When the Powertrain Control Module (PCM) detects that there is a 4.2 km/h (2.6 mph) or greater decrease in vehicle speed within 0.25 seconds and a transition of the Torque Converter Clutch (TCC) brake/cruise release switch without a transition of the stop lamp switch, the PCM sets DTC P1574.

OBDII Code P1574 GMC - Stop Lamp Switch Circuit - AutoCodes.com
P1574 GMC Code - Stop Lamp Switch Circuit

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Code P1574 GMC comments

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