Send power where it belongs when you turn the key with the Standard Ignition switch US-331. This ignition starter switch feeds the ignition, accessory and starter circuits as the key moves through its positions. It is a direct-fit replacement for many vehicles, among them the 2003-2006 Chevrolet Silverado 1500 and 2003-2006 GMC Sierra 1500.
If a worn ignition switch is behind a no-crank condition, intermittent starting, or accessories that cut out, this switch replaces it. Those symptoms can also come from other parts of the starting or electrical system, so diagnose the cause before replacing. For engine-specific details and the complete list of applications, see the Buyer's Guide tab.
Interchange: CS643 · IS156 · LS1115 · KS6254 · 12450251 · 15242754 · 19179974
This part cross-references / interchanges with the following part numbers:
What does the Standard Ignition US-331 ignition switch do?
It is the electrical switch that routes power to the ignition, accessory and starter circuits as the key is turned. It uses copper alloy conductors designed for low resistive losses.
Which vehicles does the US-331 fit?
It fits many vehicles, among them the 2003-2006 Chevrolet Silverado 1500 and 2003-2006 GMC Sierra 1500. See the Buyer's Guide tab for the full list.
What are signs an ignition switch may need replacing?
Possible signs include a no-crank condition, intermittent starting, stalling, or accessories cutting out. Diagnose first, since other starting or electrical parts can cause the same symptoms.
Is this ignition switch tested before it ships?
Yes. Standard Ignition 100% tests its ignition switches to verify both mechanical and electrical switching performance.
What part numbers does the US-331 interchange with?
It cross-references CS643, IS156, LS1115, KS6254, 12450251, 15242754 and 19179974.
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.
