?12-1-11 Prepaid to have heater core replaced in my 2003 Silverado. Left vehicle in night drop 12-2-11 at 6:30 A.M. Received call from service advisor Brent at 2:30 P.M. stating they just got the core out and that I should have told them about my XM stereo. This was supposed to be a 6 hour job but after 6 hours they had only completed 1/2 of it.They said the reason it took so long was because of stereo wiring under the dash. My XM is a factory module setup.
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