Standard Ignition Ignition Switch P/N:US-637
Standard Motor Products
Standard Ignition US-630 switch for the 2002 GMC Sierra 1500 routes power to the ignition and starter circuits when you turn the key. This Standard Ignition switch is listed as an ignition starter switch.
A key that turns without the engine cranking, dash lights that flicker or accessories that cut out can mean the switch is worn. These signs alone do not show the switch is the problem; a weak battery is another common cause.
It is a direct-fit replacement for the 2002 GMC Sierra 1500, which takes one switch. This listing is a single switch.
Fit and size
Build and materials
One switch. Mounting hardware, a mounting bracket and instructions are not included.
Interchange: CS989 · KS6989 · 26090316 · 26098767
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This part cross-references / interchanges with the following part numbers:
Is US-630 among the switches for the 2002 GMC Sierra 1500?
Yes. Standard Ignition US-630 is a direct-fit switch for the 2002 GMC Sierra 1500, which takes one.
Does the Standard Ignition US-630 come with a mounting bracket?
No. Standard Ignition US-630 comes without a mounting bracket, mounting hardware or instructions. The listing is one switch.
How many terminals does this switch have?
This switch has 18 female blade terminals and a connector quantity of 5. The connectors are rectangular and male, and the switch attaches with a snap fit.
Can a worn switch like the US-630 cause an intermittent no-crank?
Yes, a worn switch can be one reason the engine does not crank every time you turn the key. A shop can test the switch to confirm.
Is every US-630 switch tested for electrical performance?
Yes. Each Standard Ignition US-630 switch is 100% tested for both mechanical and electrical switching performance.
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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.