I recently just installed the S&B CAI on my 21 Sierra 6.2. The install could not of gone easier, plug and play with the instructions and video on their website. Only one issue that i only have myself to blame. I could not wait to hear it, and did not plug in the MFA sensor to the CAI. I immediately got a check engine light and tried the 15 min idle and drive, but to no avail. It then dawned on me that I didn't plug it in. I am trying the 15 minutes again, but will this cost me to a trip to the dealer. only have 1500 miles and paired the CAI with the GM performance exhaust.