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Old 09-29-2019, 04:08 PM   #13
fdryer
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Join Date: Jan 2006
Location: NYC
Posts: 43,601
 

2003 L-Series 3.0L Sedan
Default Re: Secondary air injection system

Although I'm not completely familiar with the air injection reaction system, the air pump runs for less than a few minutes on cold engine starts so the extra air pumped into the exhaust system helps the O2 sensor and/or the catcon heat up sooner. This tells me the blower should last beyond the average life cycle of the car. It isn't run anywhere near as long as the hvac blower motor left on all the time in some cars. The air pump motor isn't serviceable by GM standards, no different from GM never rebuilding starters or blower motors. Dealers replace with new oem parts. This doesn't stop starter rebuilds from creating a low cost replacement solution or with imported parts, brand new ones at far lower cost then oem and have proven to last several years witout issues.

The air pump isn't considered rebuildable unless an individual has some skills and familiarity with dc motors and can disassemble one to explore what's worn and deal with whether or not parts are available. Remember, the air pump isn't repaired, just replaced so if you decide on a tear down, you'd better consider where a source of parts are. This is outside the box thinking when attempting repairs on anything not considered repairable.

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