**Figure based on a stock 1986 Chevrolet C10 1/2 Ton valued at $8,600 with OH rates with $100/300K liability/UM/UIM limits.

Chevy Silverados are known to be very reliable trucks. It is possible for a Silverado to last up to 20 years and well over 200,000 miles with proper maintenance.

For the most part Chevy’s 4.8 Vortec engine was a well-performing Workhorse of an engine. As long as it was properly maintained many drivers were able to keep the engine working well for up to 300,000 miles or more.

Overall, the 4.3 vortec is a very strong and reliable motor, proven by it being the longest lasting production vortec engine. Generally, these engines are extremely capable of lasting up to 300,000 miles.

There are also simple, cheap ways to increase horsepower for your 4.3 V6.

1. Replace your air filter. The air filter gets dirty over time and restricts the flow into the engine.
2. Install a performance chip or reprogram your current computer.
3. Change you gas to a higher octane.

They have been in production from 1996 till 2002, which means there are a lot of them out there. They are easy to install on older generation I SBC V8.

The Vortec 5.3 is widely regarded as extremely reliable, with most engines having a lifespan within the 200k-300k mileage range. I own a 2002 Suburban with the LM7 engine in it and it’s running strong at 220k miles with virtually zero engine issues over my course of ownership.

The Vortec truck harness has a large portion up on top of the intake manifold, is supported by it, and is covered or hidden by the plastic engine cover. The LS engine harness is configured much differently and the intake manifold is exposed and uses valve covers to dress up the engine.

229k miles is not unheard of for a properly maintained 350. You could do a compression test and leak down test to analyze the health of the motor.

They are good reliable motors. 2 of the 3 I’ve had like to burn a bit of oil but it’s not a big deal if you check it often.

However, Chevy vehicles are routinely among lists of the longest-lasting vehicles and regularly make it past 200,000 miles.

While some love the thrill of a brand-new car or truck every few years, there are a lot of long-term financial benefits in keeping a car for 200,000 miles. According to Consumer Reports, you could save up to $30,000 or more by hanging onto your truck a while. Yes, there will be maintenance and repairs to pay for.

No, in most cases, buying a car with 100K miles is not a bad idea. In fact, there are a number of benefits to buying a high-mileage car. For example, cars with 100K miles cost less to purchase, register, and insure, all while depreciating slower than low-mileage cars.

A truck with 200,000-300,000 miles is bad in the sense that a good chunk of its lifespan has already been used. However, if you get a high mileage truck for cheap enough then even getting a few months or years use out of it could be worth it for you.

It all comes down to how well the car has been taken care of and that – more than anything – will determine when buying a high-mileage used car is or isn’t a fool-hearty idea. A 100,000 hard-driven miles might as well be 300,000 – no matter how good the car looks.

As a rule of thumb – the lower the mileage, the better. For gas engines, look for a truck with under 100,000 miles. For diesel, under 200,000 would be just as good. Anything over 250k is high miles for a truck.