Hello jesspurvis: My name is Roger and I will help you. Their is a GM tech bulletin for this . The bulletin number is 04-06-04-015A. The bulletin gives part numbers for the extension kit you will need. The only place you can find the parts is from a GM dealer. I know of no aftermarket for the parts, Also to replace the air pump and extension kit. A lot of it is done from under the vehicle. Should you need further help please just ask. Please rate the answer you received. Thank You for using Fix Ya. Roger
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