Looking at a 2016 2.8 Colorado

TheBac

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Kept looking, found this one:

Untitled.jpg

Been talking to the private seller. Turns out this truck may have been a GM test mule/preproduction truck for the 2.8 Duramax, and the RPO codes back that premise. I find that interesting.
 
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2004LB7

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Kept looking, found this one:

View attachment 128804

Been talking to the private seller. Turns out this truck may have been a GM test mule/preproduction truck for the 2.8 Duramax, and the RPO codes back that premise. I find that interesting.
Never heard of one of those making out in the wild. I would assume it would have everything maintenance and repair wise done to it while in GMs hands. Even if put through a tough life it would be cared for. No telling how the subsequent owners cared for it
 
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TheBac

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2004LB7 said:
Never heard of one of those making out in the wild. I would assume it would have everything maintenance and repair wise done to it while in GMs hands. Even if put through a tough life it would be cared for. No telling how the subsequent owners cared for it

Its life started in Warren, MI with no official owner until 14000 miles. So his story rings true.
 
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1FastBrick

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Now that I say that, It could have been part of a special test fleet or something like that. Post it in the Vin thread and see what comes back in the system on that unit.
 

TheBac

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Never heard of one of those making out in the wild. I would assume it would have everything maintenance and repair wise done to it while in GMs hands. Even if put through a tough life it would be cared for. No telling how the subsequent owners cared for it
Already did the build sheet. These two RPOs stand out:

OAR IDENTIFICATION PRE-PRODUCTION ('BUCKET' BATCH BUILD PROCESS)
WD0 IDENTIFICATION START OF PLATFORM CONTAINMENT VEHICLES

Never seen those two codes on a build sheet before.
 

1FastBrick

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Already did the build sheet. These two RPOs stand out:

OAR IDENTIFICATION PRE-PRODUCTION ('BUCKET' BATCH BUILD PROCESS)
WD0 IDENTIFICATION START OF PLATFORM CONTAINMENT VEHICLES

Never seen those two codes on a build sheet before.
Ok, so it is a Pre Production.... Interesting...
 

TheBac

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The other interesting thing is the ownership on carfax. The current owner is the first named owner, yet that didn't happen until 2017 and 14000 miles. Truck registered as commercial, not personal, initially in Warren , Mi.....which iirc is where GM testing is located. Then it spent time in Wisconsin, where this man bought it.
 
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1FastBrick

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The other interesting thing is the ownership on carfax. The current owner is the first named owner, yet that didn't happen until 2017 and 14000 miles. Truck registered as commercial, not personal, initially in Warren , Mi.....which iirc is where GM testing is located. Then it spent time in Wisconsin, where this man bought it.
Some Vehicles get the wheels driven off them while others are used for Photos' or Product testing.

In that case, it may be good as it likely hasn't seen the winter road up there.
 

kidturbo

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Sounds like a test vehicle to me.

Back in the early 90s, prior to carfax, I played with a couple cars originally titled to "GM Proving Grounds".

They were both passed onto GM dealers, sold as uses, with we'll under 500 miles. Both cars had weird powertrain options in the build sheets under the rear seat. I recall the 91 GTA ordered with Rear Disk Delete, on the big 8" rear-end setup. Every other GTA sported 4wheel disks back then.

So I think some engineering team just checks a box to run a test bed from production line, and GM tosses that vehicle in corporate fleet inventory until they are done playing. Then it hits auctions like all the executives' daily drivers..



Sent from my SM-S901U using Tapatalk
 

JoshH

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Kept looking, found this one:

View attachment 128804

Been talking to the private seller. Turns out this truck may have been a GM test mule/preproduction truck for the 2.8 Duramax, and the RPO codes back that premise. I find that interesting.
What is significant about this truck? Is it because it has the longer bed with the crew cab?
 

JoshH

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I found its history interesting. Just thought Id share it.
I guess my question was more in response to Jason's reaction about none of those making it out into the wild. I guess he was just referring to it being a pre-production vehicle.
 
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2004LB7

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I guess my question was more in response to Jason's reaction about none of those making it out into the wild. I guess he was just referring to it being a pre-production vehicle.
Yes. A test mule being sold to the public
 
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TheBac

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Moved the Colorado discussion out of the Chat thread into its own here in the 2.8 section.

Roni and I went to look at the truck today. That was a well-kept up vehicle. New tires. The color is really nice in person. No rust at all. Drivetrain runs out very nicely. No evidence of fluid leaks under the truck. Took it on a long test drive, and drivetrain and all electronics work as they should. Surprising how roomy it was.
Only two issues were a torn driver's seat bottom, which owner is repairing before sale, and a small dent in the rear bumper which can be repaired. Not concerning.

71,700 miles. Only selling b/c he no longer drives it enough to justify it.

The ONLY thing I was concerned about was when I pulled the dipstick while the engine was running. Had a lot of blowby thru the dipstick. I then took the oil cap off, and put my hand over the opening. There was not a lot of pressure, just blowby. Engine was within parameters on my scanner. Did not show any signs of coolant loss. Ran smoothly with no misfiring or odd noises. Maybe it was normal?
 
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036.6turbo

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The ONLY thing I was concerned about was when I pulled the dipstick while the engine was running. Had a lot of blowby thru the dipstick. I then took the oil cap off, and put my hand over the opening. There was not a lot of pressure, just blowby. Engine was within parameters on my scanner. Did not show any signs of coolant loss. Ran smoothly with no misfiring or odd noises. Maybe it was normal?
I wouldn't be too concerned, if everything else looks okay. Dipstick tube in in the same environment as the lower rotating assembly. Some degree of turbulence should be expected. Just my $.02
 

TheBac

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I wouldn't be too concerned, if everything else looks okay. Dipstick tube in in the same environment as the lower rotating assembly. Some degree of turbulence should be expected. Just my $.02
Thanks. In talking to my nephew in law, he told me that since it was a preproduction truck, it may have the first version of the pcv valve design, which they found let too much pressure into the crankcase so it was redesigned. I'll change it out and see what happens.

Pick it up on Saturday night.
 

2004LB7

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Is this the version that has the timing belt on the front of the engine or the chain belt combo at the rear?
 

TheBac

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Belt in front. Called Merchant to ask his advise, and he said to replace it between 100-125,000 to get ahead of it.

Was nice talking to him again. Been far too long.
 
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