Questions about replacing my high mile engine.

Crate motors are the way to go for sure. Sadly, motor is only one thing. Transmission, rear end, front suspension, heck wiring all wear out after a while. You might be just throwing good money after bad teying to squeeze another 100K out of a vehicle that is plane at the end of its useful life. IMHO you would be better off junking it and use the money to help pay for a late model CPO.

How much would it cost to rebuild your current motor?

Is your current engine getting tired? I just bought a 2001 Yukon with the 5.3L that runs great with 160k miles. I need to do something with the leaking exhaust manifold though....:M

Have you priced a new GM crate motor? It may not be much different than what you were quoted for the Jasper unit.

LS engines run a long time with care. Several hundred thousands of miles, with very little work. So if u find a good used, well taken care of 5.3with 100k cheap then I would definitely think about it. I like the idea of having cash left over for repairs down the road such as the trans. Plus you may upgrade down the road, so it leaves less investment in the old truck. As far as the 6.2, depends on the year. So if your timing gear is the 24 not the 58 then a change of computer is required. Again that’s one of the big differences between gen 3 and gen 4 engines. You can find a shop to update the old computer but only if it’s the same generation of engines, otherwise if you find the 6.2 get the computer that goes with it. Stand alone custom systems are a pain, believe me. So if it would be me.... I would find a good quality 5.3 and replace it if I had to, if not check your compression, if it’s good, replace your current oil pump and fix just what’s needed. Save up for and newer truck if your able to purchase down the road. That’s my take, hope it helps.

6500 is what I was quoted for a crate jasper 5.3. I have a feeling that would be the best route to go. I have found some used 5.3 engines with around 100,000 miles for around 2300, plus about 1000 for install. That is quite a bit cheaper than doing a crate , and would leave me extra money for a trans some day? Just a tough call which route to go? My motor is still performing quite well, but oil pressure is low at idle.

Your current engine computer will only work with the same engine size & year. You go with a different year engine or different size engine, you’ll need an engine computer designed for that engine. Often people will get a used engine and wire harness and computer from the same donor vehicle. Wise to go with a crate engine matching the current one.

In general performance is one end of the spectrum and budget is on the other. Your choices range from mild to wild. A low mileage donor for the engine and trans as a pair would be wallet friendly. A performance crate engine would be fun on the other end of the scale. What’s the budget? We can help you spend your money. :D