Faults:
Alternator at 49,000 miles (based on previous owner's records).
Starter at 75,000.
Air conditioning header hose assembly at 90,000.
At 100,000 miles, replaced leaking rear axle seals, which also required rear brakes to be replaced, leaking transmission cooler lines, leaking water pump, which also required serpentine belt to be replaced, and replaced air conditioner compressor.
Also around the 100,000 mile mark, an intermittent "service engine soon light" started showing up. The dealer replaced a fuel injector, several sensors, and even reloaded the engine control unit software, but nothing permanently solved the problem. One of the reasons I got rid of the vehicle is that I knew this problem would cause it to fail the emissions test in my state (Washington) and would require additional expenditures.
Replaced leaking power steering pump at 130,000.
General Comments:
The Suburban is a big, comfy, giant station wagon that can haul an incredible amount of stuff. That comfort comes at the expense of a driving experience that is soft and mushy - lots of body roll and brakes that are barely adequate.
This is the perfect vehicle for long distance trips when you need to haul a lot of people and all of their stuff. Well, it's perfect as long as you can afford to fill the 42 gallon tank. I usually averaged 14-15 miles per gallon, which is better than a lot of smaller vehicles with less power and less capacity.
Despite the mechanical failures, and all of the usual stuff that wears out, the 5.7 liter engine itself was always strong and reliable. I did a compression test of the motor at 130,000 miles before I traded in the vehicle and all cylinders were between 185-200 psi. One advantage of these vehicles is that they have been around so long and there are so many of them (along with the Yukon, Tahoe, and Denali variants), is that parts are plentiful, relatively cheap, and just about any shop can work on them.
This is a big truck, though (eighteen feet long), and in the end I got tired of driving such a beast as a daily commuter, especially since I didn't need all of the carrying capacity on a regular basis.
7th Jan 2016, 01:14
Wonderful to hear you made that Suburban endure the ages. 393,000 miles is pretty eye opening. If you ever get it to an even 400k, I'm sure you'll get just as many eyeballs on it if you record the event on Youtube.
Congrats on the achievement!
Steven Lang