Intro! Tell me about the GMT400 K3500- looking at a 4-dr. Chevy 6.5L turbodiesel 4x4

Garbinator

SeekTheMoneyTree
Yes-I am a bit slow, been accused of slowness only once or twice. Regards to B-town, you would not know it these days. Geopolitical climate rapidly changing as you read this. Insane comes to mind but hey! I do my part trying to be a productive consumer.

As for the truck, I too become smitten once I take a shine to some ThANg that suddenly gleams within my brain. being a wrench turner, I'm most sure you will have years of enjoyment from this truck, I look forward to viewing and reading your future buildup within these pages.

Glad you still got a good serviceable back by the way.

(......)
 

gmcpimpin

Observer
Yes-I am a bit slow, been accused of slowness only once or twice. Regards to B-town, you would not know it these days. Geopolitical climate rapidly changing as you read this. Insane comes to mind but hey! I do my part trying to be a productive consumer.

As for the truck, I too become smitten once I take a shine to some ThANg that suddenly gleams within my brain. being a wrench turner, I'm most sure you will have years of enjoyment from this truck, I look forward to viewing and reading your future buildup within these pages.

Glad you still got a good serviceable back by the way.

(......)
Weirdo....
 

Huffy

Observer
Just my 02. I have owned all the big brand diesels in boats and in trucks. Cummins 5.9 & 8.3, Ford 7.3, Volvo 41P and GM 6.5. The 6.5 was the least desireable and most problematic of the bunch but, it was not without good points and with a few aftermarket mods would get the job done. Unfortunatly, it would quit without warning. My favorite was the 8.3C series Cummins, a simple brute. The 7.3 Ford I still own is reliable as a brick but, does not stand out in any way, just the last of the old school diesels. If the 6.5 is well maintained and you don't mind some teething issues it could work out. Otherwise go for the Ford 7.3 or Cummins. Remember there is more to the equation than the engine.
 

Sentinelist

Adventurer
Thanks, guys- I just brought it home this evening and have been outside for hours getting to know the thing and making my lists. It was dark by the time we got back, so I haven't combed over it in great light yet. My two young boys were having a field day climbing all over it. For the record, my yet-unnamed rig (wife is working on this she says) was bought for $5500. Seller made out on the work he put into it for the last several years and broke even. Had a great 25 mi. drive home with the wife following me (I only coal rolled her once, ha! yet barely. had to.) and am very comfortable with the transaction so far. Had a good chat with the owner before parting ways and backing down his driveway as he followed the truck down watching it leave. I've seen that face on a seller more than once and it's hard. I'll keep him updated for his efforts.

So after getting it registered and whatnot, here are my immediate plans for the next several days (pics in a proper unveiling with bigger plans/build soon).

Add coolant- level is at the bottom of the bottle but zero overheating, also has a new thermostat and housing I learned.
Power spray the bed out- all sorts of crap in the nooks and crannies back there, but it does have a bed liner in serviceable condition.
Wash, claybar, basic polishing wax, vacuum the interior, and have the inside professionally steamed to look and feel as clean as reasonably possible.
Toss the blue plastic GM floor mats and find some decent contrasting dark gray ones (blue interior), front and back- need a sunshade too.
Change the oil with Mobil1 Delvac plus filter- full dipstick but already pitch black after ~3k mi from a change last winter.
Flush the rear diff, maybe front axles and brakes? Basically all the fluids to get a fresh baseline except the trans- that was just done incl. the filter and seal a couple months ago.
Replace the wiper blades and find a plastic tailgate handle pocket replacement.
Mount up an awesome Ranch Hand full brush guard that I haggled into the deal since he had no other vehicle to put it on, possibly respraying it black first, though it may be good as-is.
Find its owners manual on eBay to 'complete' the stock package.
Order my ExPo sticker to keep motivated.
Random solo trip/maiden voyage to a buddy's ranch this weekend to build a bonfire and catch up with some friends. What perfect timing for this acquisition!

Once I get all that done, I'll be at a comfortable baseline to then do an intro photoset and start my formal build thread for the next 2-3 years. I sure hope my family likes 'camping'... tentative first plans for that next spring out to Palo Duro perhaps.
 

Garbinator

SeekTheMoneyTree
Weirdo....


No... I am merely unique. You also do not know diddly about me, just as I know diddly about you sir. I totally understand exactly how easy bullying about the web and its users masquerade behind anonymous pseudonyms such as screen names. On the other hand, GMCPIMPIN I'm most sure you have much more to offer than a one word troll statement.


Cheers!


>><<
 

mcneil

Observer
Congrats on the good find!

The best resource I found for that 6.5 motor was The Diesel Page, if you can tolerate the dawn-of-the-internet web design. Their published books are pretty good too, with a lot of useful pointers and common pitfalls to avoid.
 

aardvarcus

Adventurer
Sentinelist,

GM Upfitters has PDFs of "Body Building Manuals" which are intended for companies who build custom beds or bodywork on their truck chassis, but the information is applicable to anyone who works or does anything custom on these trucks. These manuals are a wealth of good information and dimensioned drawings. Definitely a useful file to save to your hard drive for future reference. You can follow the link or just as easily find it on their website.

http://gmupfitter.com/files/media/photo/170/1999_LD_CKTruckCurrent.PDF
 

surlydiesel

Adventurer
I have always followed Heath Diesel and they seem to be smitten with the GM motors of that gen. If I picked up the truck you did, I would be looking at some of the upgraded parts on their site just for basic reliability issues that need to be addressed with those trucks. I love the sound of those motors!

http://heathdiesel.com/

Enjoy the new ride!!!!

-jorge
 

arveetek

Adventurer
Nice truck! Excellent platform: comfortable body style with the mechanically-injected engine. I wish my '95 2 door Tahoe had the mechanical IP instead of the electronic. That is definitely the weakest link in the 6.5L chain.

Ditto on The Diesel Page. Best source for 6.5L info around. Been on the web since 1996. They are more devoted to Duramax info now, but the 6.5L stuff is still there.

Also, on the 6.2L/6.5L family, the oil will turn black almost immediately after changing it. That's normal, so don't be too concerned. With only 7 quarts in the pan, a small-block Chevy oil filter, and sooty oil hanging around, you'll want to change that oil every 3K miles.

Here's my baby:

PA250121.JPG


She has 273K miles and runs like a champ! I've owned 6.2L's and 6.5L's since 1995. I love the cheap, simple designs of these engines.

Casey
 

Sentinelist

Adventurer
Jorge, Casey, thanks to you guys as well. I really appreciate the link suggestions as my 'Truck' folder is nearly empty. My other cars' folders are chock full, but this is my first real truck, diesel too.

Casey, your Tahoe looks great fording that river. I hope to be able to do the same someday but probably won't be going too hog wild- just some logging roads at best I imagine. Glad to hear of your similar mileage! I'm planning to get the oil changed (Delvac 15w-40) this Friday along with the diff, and maybe the front axles. Will plan to do so every 3k on your recommendation from experience. I may be in touch with you more later! These things have timing chains, not belts, right? Any typical need to replace the chain?

The seller also warned me about the 94+ diesels, presumably because of the electronics. I wanted this truck to be very analog. Which is difficult to explain with my extreme digital lifestyle otherwise- I'm not telling many folks about my new toy.
 

Sentinelist

Adventurer
Also, my 4-yr. old son and I got it pretty well cleaned up after work today (boy, did he have a blast helping out- this is going to be a great vehicle for him to learn to wash cars with!). This had to be the dirtiest vehicle I've ever cleaned before. I don't think the seller had washed it in at least a year, if not ever for the past several years. I had to literally scrub the paint to get the dirt out, twice in some spots. There's no clearcoat, or it was mixed in with the paint when resprayed several years ago, so it's pretty basic but does clean up presentably-well. The later-model HD wheels really make the rig. I'll share photos soon, maybe next week.

I did discover that I may be replacing tires sooner than I planned though (next month, instead of next year), after finding more micro cracks in the rubber and audibly hearing a minute valve stem leak from the driver's rear tire when it's moved around; currently holding 27psi out of the normal 75. Going to have that patched tomorrow, then may be looking at modest lift kit options to fit brawnier tires before Christmas. I'm also wondering if there's anyway to bring the rear wheels out wider as they're tucked in more than the fronts, without compromising unsprung weight, etc. as I continue to look at long-term options on the back.

And randomly, I'll probably be replacing the bent up rear bumper in the next few days. While it's serviceable, it also provides a convenient leg-up (literally) for our cats to jump up to the top of the fence when we let them in the backyard. Driveway is fenced in. Looking for a pre-runner style or shallow-depth unit that will be sprayed or powdercoated matte black/charcoal gray, along with everything else that is presently chrome eventually. Black accents (incl. wheels), light tan repaint is the long-term outlook. Deserty.
 
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greengreer

Adventurer
Looks like a nice truck, always good to see another 6.5. As far as your back wheels being farther in, it is done for driveability reasons. Almost all srw vehicles are like that. Also you should be able to run a 33" tire without any modification depending on width, like 255/85r16 or 285/75r16. Lifting these trucks is expensive. Overall the stock setup is decently strong,with steering and the passenger cv axle being weaklinks. Jealous of the crew cab.
 

Sentinelist

Adventurer
Thanks- helpful info! Long term I'd like to look into the lift, but if it's more than a grand or so, I don't need it this year.

I will do the tires in the coming weeks, however. If I just want something heavier duty with a beefier look (as big as I can get away with without rubbing- I won't be rock crawling), are 285/75/16s the way to go? Or would another size be more ideal? Does it go without saying my ODO will be thrown off or are there any options to correct it? Only due to it having 276k on the clock, I'll probably duly note when I made the tire change and roll with it. I'm looking at the Goodyear Silent Armor Pro-Grade in that size.

Got the rear tire fixed today- it was indeed a bad valve stem. The others aired up fine including the spare at 60psi, so I'll use these until I decide on new meats. I think I found a good rear bumper as well that will be shallow enough to work.

Also, I'm surprised at the gas mileage this thing gets- rather good, and better than my wife's Escalade ESV around town. I guess that would be expected technically, but for a newbie to diesel looking at them side-by-side, it makes you grin.
 

aardvarcus

Adventurer
I ran the popular 255/85R16s on my 2001 2500HD on those wheels but the sheer weight of the truck started to wear the tires quick and the tall skinny's weren't the best onroad especially in corners. I switched the 2500HD over to 285/70R17s and am much happier with that tire on that big heavy truck especially onroad. Both tires had their good and bad points. I have moved those tires onto different wheels for my 1991 2500LD, and since that truck is about 30% lighter I haven't noticed any of the same issues with the tires on that truck yet. The only bad thing about going to 285s on your stock PY0 wheels is how narrow they are, you may experience uneven wearing. Many people have run 285s on those wheels though, but some people to move to H2 wheels or other stock GM 17s to get more rim width. Just realize the potential for wearing issues is there.
 

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