Three problems related to seat belt have been reported for the 1998 GMC Sierra. The most recently reported issues are listed below.
When I bought my used 1998 GMC Sierra 4x4 k1500 truck in 2003 the front passenger seat belt would not work! I took it into gus paulos Chevrolet to have it repaired. They warrenty the defective seat belt since it would not pull out. Thats a 5 yrs old truck so now in 2007 it goes out again, this time they are charging me for it? the service rep said "it only has a three year warrenty". I thought it's a saftey part/ saftey issue and they should flip the bill. What if it failes in a collision? the part is on order so I should be getting the part next week. " I haven't needed it done till now since my daughter is old enough to sit upfront".
The drivers side seat belt did not lock.
Going 30mph & another vehicle crossed in front & was hit broadside. The air bags deployed. Seat belt failed to restrain passenger, and passenger was injured.