This chapter has proposed a structural analysis of the surface vowel system of Los Angeles Chicano English. The average phonetic realizations (in F1-F2 space) of the acoustic nuclei of the phonological vowel classes were described by several rules of phonetic implementation. Then the effects of phrasal stress on the performance of vowel production by one speaker were investigated through F1 and F2 measurements, finding that stress reduction shifts vowels in the direction of a high and somewhat front of center reduction target, which could be identical with the phonetic realization of //. Some dialect-specific effects of following consonants are also discussed in Chapter 10.