Air pump on a 97 C2500

[pknowles]

Where is the air pump located on my 97 C2500 and where does it pull air from? Does it use a seppate filter rather then the air filter for the engine? At start-up lately the truck has made a high pitch whining sound until it is warmed up. My 2002 Camaro did the same thing when the filter for the air pump was very dirty and couldn't suck in enough air, so I'm assuming the same thing on the truck. I looked up the part number for the air pump and they used a new one from 97-on. Did they start using an electic one in 97? I know the older trucks had a engine driven air pump, but I don't because I looked over the engine very carefully last night. Thanks.

[Mike G]

Where is the air pump located on my 97 C2500 and where does it pull air from?  Does it use a seppate filter rather then the air filter for the engine?  At start-up lately the truck has made a high pitch whining sound until it is warmed up.  My 2002 Camaro did the same thing when the filter for the air pump was very dirty and couldn't suck in enough air, so I'm assuming the same thing on the truck.  I looked up the part number for the air pump and they used a new one from 97-on.  Did they start using an electic one in 97?  I know the older trucks had a engine driven air pump, but I don't because I looked over the engine very carefully last night.  Thanks.

 

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Should be on the front of the motor, passenger side, mid to lower portion, driven by the belt.

 

--Mike