I wish I had chipped the Tahoe I used to own as it was a California emissions equipped but sold in NV. The driveability was terrible with next to no part throttle response. This caused many more kickdowns than I felt were ideal and the EPA gas mileage could only be reached by major feather-footing. Found out after I sold it that the non-Cal vehicles did not suffer from this AND got better gas mileage.

I will never, ever buy another CA/MA emission equipped vehicle unless i know that fault is easily rectified.