Answer by taking a quote from the following article:

Double Trouble is an American blues rock band from Austin, Texas, formed by guitarist/singer Stevie Ray Vaughan in 1978. The group was active throughout the 1980s and responsible for reviving the blues, inspiring many later blues and rock musicians. Formed in Austin, Texas, by 1985 the group consisted of Vaughan, Chris Layton (drums), Tommy Shannon (bass), and eventually Reese Wynans (keyboards). While with Vaughan the band was billed Stevie Ray Vaughan and Double Trouble.

In September 1977, Stevie Ray Vaughan formed a revue-style group with several musicians from the Austin live music scene, including singer Lou Ann Barton, bassist W. C. Clark, keyboardist Mike Kindred, drummer Fredde Walden, and sax player Johnny Reno. They called themselves Triple Threat Revue, which was a nickname for Vaughan in reference to his multi-instrumental talent. By May 1978, Clark and Kindred had left the group; Vaughan changed the name to "Double Trouble", after an Otis Rush song of the same name, and a reference to both Vaughan and Barton. After Clark left to form his own band, Barton auditioned and hired Jackie Newhouse, who first met Barton in Fort Worth. In July, Walden was replaced by Jack Moore, a native of Providence, Rhode Island who moved to Austin and pursue drumming. After three months, Moore moved back to Providence to finish college, and was replaced by Chris Layton in September.  When Barton and Reno decided to leave the band in 1979, the group morphed into a power trio and Vaughan became the lead vocalist, and their name was changed to "Stevie Ray Vaughan and Double Trouble". In October 1980, during one of the band's frequent appearances at Rockefeller's in Houston, Vaughan jammed with Tommy Shannon, a former bassist for Johnny Winter, and was hired in January 1981. During the next year-and-a-half, the group gained popularity by performing in Texas clubs such as Fitzgerald's and Club Foot. They hired Chesley Millikin as their manager, who had been Epic Records' general manager in Europe, and ran Manor Downs, a horse racing track near Manor, Texas. The band performed at the racetrack the following year, which was filmed for a proposed television series, though it was not picked up by any major network.  In March 1982, producer Jerry Wexler recommended Vaughan and Double Trouble to perform at the Montreux Jazz Festival in Switzerland, after attending a performance in Austin. In July 1982, the band performed at the festival and were the first unsigned act to perform at the event. Despite boos from the audience, their performance caught the attention of David Bowie and Jackson Browne, the latter who offered the group free use of his recording studio in Los Angeles. Layton recalls: "He goes, 'I have a studio in Los Angeles. I keep it for my pre-production work and have loaned it out to a number of people for special projects. If you guys are ever in Los Angeles and you want to use it, just let me know in advance and it's yours.'"

Who were the members of the band?
Lou Ann Barton, bassist W. C. Clark, keyboardist Mike Kindred, drummer Fredde Walden, and sax player Johnny Reno.