NGK 58921 direct ignition coil boot for the 2004-2006 Chevrolet Colorado 4-cylinder 2.8L or 5-cylinder 3.5L and other vehicles connects the ignition coil to the spark plug. It takes one boot per cylinder, so the number you need follows the engine.
A misfire, rough running or a cracked, torn or carbon-tracked boot can mean the boot has worn out, but a spark plug or coil can also be behind a misfire. Before buying, look at each boot with the engine off and cool, and find the cause of the misfire first.
The boot also fits the 2004-2006 GMC Canyon 4-cylinder 2.8L or 5-cylinder 3.5L and the 2002-2005 Chevrolet Trailblazer 6-cylinder 4.2L, along with many other models. If your vehicle is not named here, enter its year and engine in the "Vehicles it fits" section to see whether this boot is listed for it.
Interchange: 50004-1 · 175-1061 · 35-7003 · 671-4272 · 671-5008 · 671-6069 · 36-2016 · CPB-GM005
50004 · SPB129 · 702423 · 727423 · 02506 · 2506 · 114032 · 115001 · 116073 · SPP65 · SPP65E
This part cross-references / interchanges with the following part numbers:
Does the NGK 58921 boot fit the 2002-2005 Chevrolet Trailblazer 6-cylinder 4.2L?
Yes. NGK 58921 is listed for the 2002-2005 Chevrolet Trailblazer 6-cylinder 4.2L, which takes six boots, one on each cylinder.
Is the NGK direct ignition coil boot made of silicone?
Yes. The NGK 58921 boot is made of premium grade silicone, designed to withstand harsh environments.
Do the internal springs and resistors come with this direct ignition coil boot?
Yes. The boot includes all required internal springs and ferrite resistors, which also provide RFI noise suppression.
Why replace coil boots when changing spark plugs?
The boot is the link between the ignition coil and the spark plug. Replacing the boots along with the plugs helps prevent ignition problems such as flashover.
Is NGK 58921 the same part as CPB-GM005?
Yes. This direct ignition coil boot is listed under both 58921 and CPB-GM005, so a search for either number finds the same part.
No reviews yet — be the first to review this product.
Write a Review
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.
