I have a 89 Suburban 350 FI 700r4 with 165,000 miles I have MANY problems but I'll list the most annoying first. First of all the motor and trans seem to be running very well. Except for my 8mpg fuel econ. I don't know much about repairing vehicles but I do know that vacuum hoses are supposed to lead somewhere. In the engine bay there are several small hoses which to me look like vacuum hoses, they look like they were cut off or torn loose...? There are also no breathers on the valve covers, just a nipple. More small hoses cut leading from bottom of radiator... I have no idea if this may be leading to poor mpg. Can I find a vacuum routing diagram online? ANY advice is appretiated greatly! I purchased this truck a few months ago and new problems pop up all the time. Joe
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19 years ago