What does P1574 mean on a Chevy?

P1574. Stoplamp Switch Circuit. Applies to Silverado, Sierra, Tahoe, Impala, Malibu, Equinox.

What causes P1574 on a Chevy?

Misadjusted or worn brake pedal position/stoplamp switch, extremely common on GMT900 trucks Failed cruise-control release switch contacts inside the combination switch Chafed stoplamp wiring above the brake pedal bracket Aftermarket LED brake bulbs back-feeding the cruise release circuit

How do I fix P1574 on a Chevy?

Watch both brake switch states on a Tech2/GDS2 scan tool while pressing the pedal slowly Adjust or replace the brake pedal switch; it is inexpensive and the most common fix Check brake lamp operation, including the center high-mount lamp, for wiring faults Restore stock bulbs if aftermarket LEDs correlate with the fault

Code

P1574

Stoplamp Switch Circuit

Category: Powertrain - Computer and Auxiliary Controls
Severity: Check Engine Light
Applies to: Silverado, Sierra, Tahoe, Impala, Malibu, Equinox
Related: No single generic twin. See OBD Codes List

What it means

P1574. Stoplamp Switch Circuit. This Chevy-enhanced code applies to Silverado, Sierra, Tahoe, Impala, Malibu, Equinox.

Findings, check these first

Misadjusted or worn brake pedal position/stoplamp switch, extremely common on GMT900 trucks
Failed cruise-control release switch contacts inside the combination switch
Chafed stoplamp wiring above the brake pedal bracket
Aftermarket LED brake bulbs back-feeding the cruise release circuit

Standard procedure

Watch both brake switch states on a Tech2/GDS2 scan tool while pressing the pedal slowly
Adjust or replace the brake pedal switch; it is inexpensive and the most common fix
Check brake lamp operation, including the center high-mount lamp, for wiring faults
Restore stock bulbs if aftermarket LEDs correlate with the fault

Look up another code

Press / to jump to the box. Chevy-enhanced powertrain, body, chassis and network codes.

Sources and review

Review: no source links are recorded for this entry.

Last updated 2026-09-13.

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