One problem related to fuel injection has been reported for the 1999 GMC Yukon. The most recently reported issues are listed below.
J3140- eng cool adaptr rpl, f2023-pin shaft seal, t2020-warrenty towing, f3023-rr diff housing rpl, c0382 r/r win reg r&r/ rpl, j1400-flywheel(auto) rpl, j5645-fuel injector clean, k4123 trans case sel sw,12345104, check engine soon light came on everytime I had work done. The truck has been in the shop up to 8 times!.