Hello Chevrolet Forum. I just joined the site and need some help with my son's 2002 Chevy 1500 4x4 5.3. He has 189,000 miles on his truck. His truck shows check engine light. We took it to local auto parts and ran scan. It showed up with a couple codes. I cant remember exactly the code but they printed out a sheet and it said intake leak, lean bank 2, and high idle. We went ahead and replaced both knock sensors, knock harness, cam sensor, oil sending unit, intake gasket, valley cover gasket, cleaned the throttle body, and replaced TB gasket. the truck started ok but ran high at first. It ran about 20 -30 mph without pressing the gas. My son said he thought he had the cruise control cable screwed into the connector backwards. When he turned it around and readjusted the screw back to 3 1/2 threads showing it worked good. The problem now is it is showing P0507 which we think is idle air control valve. This code was not there before we did all the work. I hate to just keep buying parts if that's not the problem Any help would be appreciated. Thanks in advance!!!

 

Any one have any suggestions? A lot of readers but no replies. Need help soon my sons inspection sticker is due next week! Thanks

 

still appears to be a vacuum leak. It could be at the PCV valve or the EGR valve or anywhere else.