454. Vortec max miles you would go?

[Doogiedoogster000000]

I just paid $ 1500 for a 96 burb 2500 4x4 that has 260k miles. It's a dog and will need rebuilt eventually. I don't drive much and when the motor needs replaced I'll be ready for it.

 

[454cid]

How many miles?......all of them! I have 280 something on mine.

 

[FLJoe]

I'm the second owner of my 96 4WD Tahoe, since about 70,000 miles and two years old. It's got 490,000 miles on the all original engine. I replaced the original transmission at 440,000. It still worked, but had a first gear whine, some slip going 1-2 at full throttle, and the TC clutch was not working well. I replaced it with the 100,000 mile warranty GM reman unit, rather than mess with rebuilding it.

The heads have never been off the engine. I end up changing the lower intake manifold gasket every 150K or so, but that's the farthest the engine has ever been apart. I still drive it about 15,000 miles a year, including towing an 8,000 lb boat around now and then.

I get about 1500 miles/quart (including leakage). The rear axle was rebuilt about 200,000 ago with new bearings and spider gears. The front suspension was redone at about 420K, or so, and overall, the truck drives as well or better than it ever has. I wouldn't hesitate to jump in it and take a 1000 mile trip if I had to, and I often do 500 mile weekends in it.

Well taken care of, these trucks are basically timeless and ageless.

 

[454cid]

I'm the second owner of my 96 4WD Tahoe, since about 70,000 miles and two years old. It's got 490,000 miles on the all original engine. I replaced the original transmission at 440,000. It still worked, but had a first gear whine, some slip going 1-2 at full throttle, and the TC clutch was not working well. I replaced it with the 100,000 mile warranty GM reman unit, rather than mess with rebuilding it.

The heads have never been off the engine. I end up changing the lower intake manifold gasket every 150K or so, but that's the farthest the engine has ever been apart. I still drive it about 15,000 miles a year, including towing an 8,000 lb boat around now and then.

I get about 1500 miles/quart (including leakage). The rear axle was rebuilt about 200,000 ago with new bearings and spider gears. The front suspension was redone at about 420K, or so, and overall, the truck drives as well or better than it ever has. I wouldn't hesitate to jump in it and take a 1000 mile trip if I had to, and I often do 500 mile weekends in it.

Well taken care of, these trucks are basically timeless and ageless.

You don't have a 454, if you have a Tahoe.

 

[FLJoe]

You don't have a 454, if you have a Tahoe.

I know what engine and transmission I have. My point was that if a 350 and 4L60 can last that long, the big block and heavy transmission can also be reasonably expected to last a good long time. Other people posted long-mileage results with non-454 truck to support this.