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-   -   1988 - 1991 5.7L TBI Factory Air Box Part Number (https://blazerforum.com/forum/full-size-k5-1969-1991-gmt415-1992-1994-tech-42/1988-1991-5-7l-tbi-factory-air-box-part-number-107550/)

samuel.michaelclark@gmail.com Nov 17, 2025 01:37 PM

1988 - 1991 5.7L TBI Factory Air Box Part Number
 
I am working on a 1989 SBC350 TBI. The previous owner I purchased it from had replaced the factory top-hat style throttle body intake air box with a K&N "cold air intake" (a sub-par cone filter on a stick, really). I would like to convert it back, however, I'd also prefer to option one of the enclosed airboxes that some 1989-1991 K5s and later GMT400 Tahoes and Yukons were equipped with. It should resemble the following: 1989 k5 blazer engine bay - Search Images

However, I cannot seem to find a part number - just replacement air filters. Does anyone have a part number?

samuel.michaelclark@gmail.com Nov 17, 2025 02:22 PM


Originally Posted by samuel.michaelclark@gmail.com (Post 758159)
I am working on a 1989 SBC350 TBI. The previous owner I purchased it from had replaced the factory top-hat style throttle body intake air box with a K&N "cold air intake" (a sub-par cone filter on a stick, really). I would like to convert it back, however, I'd also prefer to option one of the enclosed airboxes that some 1989-1991 K5s and later GMT400 Tahoes and Yukons were equipped with. It should resemble the following: 1989 k5 blazer engine bay - Search Images

However, I cannot seem to find a part number - just replacement air filters. Does anyone have a part number?

I may have answered my own question; its two parts:

"Cleaner A" 25087956 / 25097769, and

"Air cleaner intake duct (rear intake tube)" GM 15602322.

Revised Question: aside from pick'n pull/auto yards, does anyone know where these parts can be sourced? Chevyparts/partsgeek list them as "discontinued", without purchasing options.

LesMyer Nov 17, 2025 09:36 PM

Yeah, the picknpull yards will be your only source. Good luck and best wishes.


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