My opinion is that the 80-86 Suburbans have the lowest quality and the most emmisions issues of the whole production history. Of course the front clip was changed in 81 and the body panel thickness was reduced I believe. In 87 The TBI system was introduced and the emissions issue were solved to a large degree. The 700R4 also was brought into the line in 81 also and was problematic for several years.is there any year surburban to avoid? i'm getting ready to buy a 1985 surburban ,4x2 ,150000 miles, one two inch rust hole, needs paint,perfect interior for a $1000 from the original owner and was wondering if its a good deal?