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Click on image for the lowdown. 
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| | | Forums66 Topics128,012 Posts1,055,313 Members48,419 | | Most Online14,466
Apr 26th, 2026 | | AD Chevy Trucks  Over 6,000 pictures Brad Allen has an awesome collection of Chevrolet factory pictures that he has set up from film strips. Check them out!
Lots of work on Brad's part ... pure enjoyment (and references) for you!
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For helping keep this great
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on the Internet for over 30 years! and not clogged down
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| | | | Joined: Dec 2007 Posts: 180 Wrench Fetcher | | Wrench Fetcher Joined: Dec 2007 Posts: 180 | you need the front air fuel sensors to help the computer adjust the fuel trim. cats are not needed. neither are the rear sensors. the rear sensors are there only to monitor the performance of the convertor. | | |
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