One problem related to axle shaft seal has been reported for the 1999 Chevrolet Tahoe. The most recently reported issues are listed below.
Vehicle shudders when braking from high speeds, and pulls to the side when braking from low speeds, vehicle was inspected and it was determined that the right front hub leaked grease on the pad and brake drum rendering the brakes useless, the cause was a seal leaking, four months later consumer experienced problems again, mechanic found that both rear axle seals had leaked grease/oil on both rear brakes rendering then useless and causing excessive wear on the front brakes, consumer requested that the rear axle be replaced entirely which would probably eliminate the brake failure, however dealer stated that they only replaced the axle seals.