One problem related to carburetor has been reported for the 1999 Chevrolet Tahoe. The most recently reported issues are listed below.
Intake manifold leaks coolant at front and rear. Talked to technicans and was told this is a problem that they do these all the time. They had two in the shop the morning that I was talking to them. I asked if the replacements would solve the problem and was told that they would last long enough for the vehicle to get out of warranty. I have two gm vehicle with the same problem one in warranty and one out of warranty. Ugh.