I am going to look at a 1993 Suburban 1500 2WD, 350TBI, TH700R4 with 166K miles on it. The truck has had two owners, and it seems the seller has taking good care of it, having detailed service records. It is on the original engine and transmission, and the body is rust free (a big selling point for me). What problem areas can I look for on these trucks? I know these TBI engines are good for a lot of miles, but I am always unsure when they are somebody elses miles. The current owner says he did 3000 mile oil changes, and he claims it uses a quart during that interval. I know the transmissions on these trucks are known to fail, but it does have a auxillary cooler, had regular filter and fluid changes, and was rarely used for towing (an 18' boat). It has rear heat, and he figures the lines are starting to clog as the output has been low. Any input is appreciated, especially those who have owned a Suburban from this vintage. I'd hope this truck would last to at least 250K without many major repairs.