Two problems related to battery cable have been reported for the 1999 GMC Suburban. The most recently reported issues are listed below.
Since purchasing SUV new, I have had 3 failures to crank due to a design defect in the hot lead cables that attach to the battery. The lead washer used between the two leads becomes misshaped and loses the ability to cause a connection. The danger to human life is directly related to where the driver happens to be when this connection fails to occur. I have broken down at home (which was safe) , 200 miles from home at a hotel (which was not safe) and in the school parking lot. This is a common problem among the many I know that have GMC SUV's or trucks that use this dual hot lead system. It is a defect in the design because the lead washers they use become misshaped over time. As you can see I have less than 35,000 miles on this vehicle. A vehicle with that mileage should be more dependable. GMC should fix the defect or extend the warranty for these failures.
Consumer states that the delco ac freedom battery was replace due to a faulty battery and alternator. Now at the present time the second replacement is leaking battery acid unto the battery cable. Nlm.