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Reman Engine options 2005 Sierra SLT 5.3L 4x4

Remnaufactured Engine Options for 2005 5.3L

Reman Engine options 2005 Sierra SLT 5.3L 4x4

Postby Red Eye Sierra [OP] » Jan 08 2020, 2:14am

I have a 2005 Sierra 1500 SLT 4x4 Z71 with a 5.3L. 288,000 miles. For the last year I have been burning about a quart of oil per month or two. For the last 6 months, puff of smoke occasionally on some starts. Hot/cold weather doesn't matter. Hot/cold start doesn't matter. About 1 out of every 7-10 starts I would get the puff of smoke. Took this as a sign of valve issues, but have been lazy in addressing it. Started truck the other day with noticable misfire and blinking engine light after running for 3 minutes. Drove immediately home (5 miles). Coded as P0300 and P0303. Misfire on cylinder 3. Did the easy stuff. Spark plug was in tight. Not a pretty plug but certainly okay. Plugs are under 50k miles on them. Swapped plug, wire, and coil with cylinder 1. Reset code. Coded again to P0303. I have read about these engines having lifter problems. Given the mileage, the work load it has had (trailering often), and the age. I am guessing valves, broken lifter, etc. I will pull valve cover this warm weekend to confirm.

My question is this: If I decide to replace the engine with a remanufactured engine, what are some of the pros and cons of the various companies? My only experience is with dropping a Jasper rebuilt 350 in an old 1988 C1500, which was preceeded by a transmission swap on a road trip the year before. I only ran the truck for another 20,000 miles with no issues and then traded in for a 2003 Sierra (got flooded), 2004 Sierra (hit by drunk), and now this 2005 Sierra. Any opinions on the value of a rebuilt. Reputation of various companies, etc. I can't afford to purchase a new or used truck at this point, as anything decent is easily 20k. I know transmission will also come up soon. Slippage, etc. Should I replace both at once? Does it matter?
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Red Eye Sierra
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Re: Reman Engine options 2005 Sierra SLT 5.3L 4x4

Postby B52Bombardier1 » Jan 08 2020, 3:17am

You might try getting the heads rebuilt or at the very least, replace the valve seals. That might fix your puff of smoke upon engine start and will be vastly less expensive than an engine. This will also reveal the status of those lifters. All in all, I believe your engine has more life remaining with a little maintenance.

How many miles per year do you put on this vehicle? Has it had good oil change intervals?

Rick
1970 Chevy El Camino 5.3 liter LM7 Engine and 4L60E Transmission
B52Bombardier1
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Re: Reman Engine options 2005 Sierra SLT 5.3L 4x4

Postby Red Eye Sierra [OP] » Jan 08 2020, 2:03pm

6000 miles per year, for about the last 2 years. Other than short 300 mile round trips 5-6 times a year, it is a daily commuter with round trip to work of about 20 miles.

Oil has been changed every 5000 miles, with Amsoil synthetic since I have done oil changes after dealer did first 3 oil changes.

Do you have any idea how much time a shop would have to take to tell me whether or not valves are toast?

Since I am considering engine swap, is it worth spending a couple of hundred dollars and having shop assess rest of truck?
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Red Eye Sierra
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Re: Reman Engine options 2005 Sierra SLT 5.3L 4x4

Postby B52Bombardier1 » Jan 08 2020, 2:39pm

I would only do the engine assessment if you plan on keeping the vehicle and NOT doing the engine replacement.

If these are the original heads, at the very least, you need valve seals. No guessing or assessing on that. I'd do a compression test and/or a leak down test to tell if anything more needs to be done. If these tests are good, I'd change all intake and exhaust valve seals and try to solve your DTC code problem which will hopefully be an easy fix.

With your usage and those good oil changes you have provided, you have more years available in that motor.

Rick

Sent from my SM-G965U using Tapatalk
1970 Chevy El Camino 5.3 liter LM7 Engine and 4L60E Transmission
B52Bombardier1
Combustion on 2 pistons [L2]
Combustion on 2 pistons [L2]
Posts: 221
Topics: 1
Images: 1
Joined: Nov 30 2019, 1:17pm
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Location: Bossier City, Louisiana
Year: 1999
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Re: Reman Engine options 2005 Sierra SLT 5.3L 4x4

Postby Red Eye Sierra [OP] » Jan 08 2020, 2:51pm

Thank you Rick. Good advice. Will follow up and let the board know of my outcome.
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Year: 2005
Make/Model: GMC Sierra
Extra Info: 1500 SLT 5.3L 4x4
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Registered users

Re: Reman Engine options 2005 Sierra SLT 5.3L 4x4

Postby Avalancheeddie » Jan 14 2020, 1:25pm

Fraser engines I feel are the best remanufactured engines to buy. Gives you amazing peace of mind. 5yr unlimited mile warranty and I paid 2700$ in total for mine . Like a new truck lol
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