Regain command of your power locks with the Standard Ignition Power Door Lock Switch DS-1557 (also written DS1557). This direct-fit switch drops into the listed 1990-1994 Chevrolet and GMC full-size pickups — C1500, C2500, C3500, K1500, K2500, K3500 (1990-1994) plus the C3500HD (1991-1994) — sending the signal that locks and unlocks the doors when you press it.
Key features:
If a worn or unresponsive switch is the cause of doors that won't lock or unlock from the button, this replaces it. See the Buyer's Guide tab for the full application list and engine details for your vehicle.
Interchange: 19239445 · S9511 · SW5716 · PA856 · 19179680 · 22086338
This part cross-references / interchanges with the following part numbers:
What does this switch do?
It is a power door lock switch that sends the electrical signal to lock and unlock the doors when you press it.
Which vehicles does the DS-1557 fit?
It fits the listed 1990-1994 Chevrolet and GMC C/K 1500, 2500 and 3500 pickups, with the C3500HD covered 1991-1994. Check the Buyer's Guide tab for the full list.
What are signs this switch may need replacing?
Doors that won't lock or unlock from the button, or an unresponsive/intermittent switch. Diagnose the cause first, since wiring or the lock actuator can produce similar symptoms.
What are the contacts made of?
The switch uses copper alloy conductors for strong electrical conductivity with low resistive losses.
Is this switch tested?
Yes. Standard Ignition states each part is 100% tested to verify both mechanical and electrical switching performance.
WARNING: These products can expose you to chemicals including lead and phthalates, which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.
