Hello - if this is a repeat question, apologies. I have a 2WD '03 Tahoe LT 5.3 with about 56,000 miles on it. Got a "Service Brake Booster" message on the DIC a couple times last week. Stayed on for a minute or so each time, and then went back to the odometer display. Didn't seem to be any problem with the brakes (pedal feel was fine) but I took it to the dealer to have it checked out. Dealer has had it for two days and can't figure out what's wrong with it. They also can't get the message to come back on the DIC, and told me the messages displayed on the DIC don't store as codes for the scan when they plug in the diagnostic computer.
Anyone heard of the "Service Brake Booster" message?