Send battery power to the ignition, starter, and accessory circuits every time you turn the key with the Standard Ignition Ignition Switch US-343. It installs as a direct-fit replacement for the listed applications: the 2000-2004 Chevrolet Blazer, 2000-2004 Chevrolet S10, 2000-2005 GMC Jimmy, 2000-2004 GMC Sonoma, 2000 Isuzu Hombre, and 2000-2001 Oldsmobile Bravada.
- Core electrical job: opens and closes the circuits that power the ignition system, engage the starter, and feed accessory loads as the key moves through the off, accessory, run, and start positions.
- Direct-fit application: a replacement switch for the vehicles listed above.
- Signs it may need replacing: a key that won't turn power on, intermittent loss of dash or accessory power, stalling, or a no-crank condition when the switch fails to complete the starter circuit.
If a worn or failed ignition switch is the cause of those symptoms, replacing it with US-343 returns proper switching to the affected circuits. Because similar symptoms can also come from the lock cylinder, wiring, battery, or starter, diagnose the cause before replacing.
Interchange: CS658 · LS1076 · KS6255 · 26070111 · KS6255SB
Manufacturer part number US-343
This part cross-references / interchanges with the following part numbers:
Frequently Asked Questions
What does the US-343 ignition switch do?
It's the electrical switch that opens and closes the ignition, starter, and accessory circuits as the key moves through the off, accessory, run, and start positions.
Which vehicles does the US-343 fit?
It's a direct-fit replacement for the 2000-2004 Chevrolet Blazer and S10, 2000-2005 GMC Jimmy, 2000-2004 GMC Sonoma, 2000 Isuzu Hombre, and 2000-2001 Oldsmobile Bravada. See the Buyer's Guide tab to confirm your vehicle.
What are the signs of a failing ignition switch?
Common signs include a key that won't turn power on, intermittent loss of dash power, stalling, or a no-crank condition. Have the cause diagnosed first, since wiring or the lock cylinder can produce the same symptoms.
What numbers does this switch interchange with?
It interchanges with CS658, LS1076, KS6255, 26070111, and KS6255SB. Its own manufacturer part number is US-343.
Will replacing the ignition switch fix a no-start?
If a failed ignition switch is the cause, US-343 replaces it, but a no-start can also come from the lock cylinder, wiring, battery, or starter, so diagnose the cause before replacing.
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