I need some help please. I have a 09 Silverado with the 5.3. I just recently installed a Comp Cam 54-418-11 224/228 0.534 int./0.537 exh cam. The problem that I am having is, I keep getting the check engine light on complaining about the motor running lean after the cam install. I have called comp cams about the problem and all they will tell me is that I have a tuning problem. I then called Summit Racing about buying new 36# injectors for the truck since the truck only has stock 20# injectors installed. Their tech support told me that I don't need bigger injectors but per their Comp Cams notes, I have the wrong intake on the motor. Summit said that I needed the 6.0 litter intake or a FAST intake, not bigger injectors per Comp Cams. I currently have the stock 5.3 intake on the motor. I have logged the injector percentage duty rate. The most that I’ve seen the duty rate was at 81%. I am also using the HP Tuners Beta software. I don’t know what to do. I can’t get the same answer from the two companies.