1991 with 250,000 miles. Just rebuilt the tranny last month. I`ve replaced the alternator at 159,000 The fuel pump at 191,000 Starter at 185,000. The battery has had to be replaced one time and I traded for another new battery that I didn`t need a few year later. I am still runnin one original universal joint and the air is as cold as I`ve ever felt. I had the truck fever a couple of years back but I can`t part with this solid old truck. My 97 Tahoe is a good smooth riding and handling vehicle but the fuel system on the Vortec has been a bigger problem than the TBI on the 91 truck.