Jump to content

02 2500hd 8.1l

theflatlander

Recommended Posts

theflatlander New Member

theflatlander

Posted
Posted

If it's still available I will be looking at a 02 2500hd with 8.1l tomorrow that has only 60k. This will be a tow/haul truck.

 

Besides the gas mileage is there any reason I should avoid this truck, or anything I should be looking for when checking it out?

Formulabruce Enthusiast

Formulabruce

Posted
Posted

Ill add the steering column can make a clunking sound ( upper column shaft joint ,not a big deal really) If it has sat and has Disc brake rear, check for Rust. These trucks were made in 2500 and 2500 HD, make sure you are looking at what ya want. The regular 2500 is a 1500 HD basically with a semi floater rear and weak 1500 rear frame.

mike221 Enthusiast

mike221

Posted
Posted

OE crank position sensors had a recall on them, so make sure thats been done. If it does have an 8.1, then it will be a 2500HD. Will have an Allison and an 11.5" too. Fuel consumption is your only real major concern with these trucks. That, and they love to burn oil.

 

Sent from my Vortec-powered Droid Turbo using Tapatalk

onebad8.1 Enthusiast

onebad8.1

Posted
Posted

If it's 4x4 check for the dreaded pump rub on the transfer case and the oil cooler lines I replaced mine every 7 years but other than that there great trucks I love mine and there beast for towing

Raptordude Enthusiast

Raptordude

Posted
Posted

As far as the crank position thing goes, I had to do that on my 6.0 and it's easy. It WILL leave you sit if it goes bad, which sucks. But it's a $60 part and you can install it in 20 minutes

 

 

Sent from my iPhone using Tapatalk

cfsierra Enthusiast

cfsierra

Posted
Posted

make sure the coolant looks good and isn't the original from 2002! i let mine go waaaay to long and it created a lot of sludge and costing a lot to repair. i forget when the allison tranny was available; check if it has it as that's preferable over the 4l80e from what I've read. if i replace my current truck it would be a 8.1/allison combo. good luck!

Raptordude Enthusiast

Raptordude

Posted
Posted

As far as I know, (I could be wrong) the Allison and 4l80e have pretty much the same strength, except the Allison is a 6 speed which leads to lower highway rpm cruising and lower rpms between shifts. Also, even though it would have been good to have the coolant changed, it should be ok. I have a 2001 2500HD with the gas 6.0 and it just had its first coolant flush a couple months ago. Despite being so old, there was very little to no corrosion at all, so I think you would be fine

 

 

Sent from my iPhone using Tapatalk

dewfpo Senior Enthusiast

dewfpo

Posted
Posted

The Allison is said to be more stout, especially when worked hard behind the 8.1L. The Allison's were 5 speeds until 2006, when they became 6 speeds.

 

DEWFPO

Beaux Duke Enthusiast

Beaux Duke

Posted
Posted

I haven't had any issues with the metal brake lines on mine but I live down south and we don't salt our roads. However I did have to replace the rubber brake line on the front passenger side last week. I also had the crank sensor failure but it wasn't very difficult to repair. Also over the 16 years of ownership I'm on my 3rd battery.

 

The Allison is a great transmission and it's needed behind the 8.1 because of the torque. I've got 94K on mine and it's sole purpose in life is to pull my trailer for my Kubota L48 TLB or my 5th wheel camper. I get about 8mpg loaded so I put a tank in the bed to give me about 60 gallons of fuel and a range over 400 miles. I use Castrol GTX 10w30 and have no oil consumption issue. In 2001 the Duramax was only slightly more powerful (way more torque today) and cost an extra $4,500 over the 8.1. That much savings bought a lot of gas. My math said I'd break even at around 100K. I'd do it again if GM still offered the 8.1

Super 8 Enthusiast

Super 8

Posted
Posted

Why is the allison preferable over the 4l80e? The 4L80e is certainly a strong, reliable transmission that's not prone to failure.

The Avalanche and the Suburban share the same 4-L85E transmission and that is the only way the the Suburban and Avalanche with a 8.1L came.

brainpause Enthusiast

brainpause

Posted
Posted

Found an 02 2500HD 8.1L with 133k miles on her. Owner admits to "rod knocking" but it is still drivable.

 

Assuming the worst, what would replacement with a crate engine run, labor and all?

 

Larry

Formulabruce Enthusiast

Formulabruce

Posted
Posted

Found an 02 2500HD 8.1L with 133k miles on her. Owner admits to "rod knocking" but it is still drivable.

 

Assuming the worst, what would replacement with a crate engine run, labor and all?

 

Larry

I would see if the "rod" knock gets a lot quieter when engine has warmed up. It could be Piston slap, a common issue on 200-2002 GM engines as they went super light weight . If thats the case it will run a very very long time with the noise... IF its a rod knock, better find a crate engine

Archived

This topic is now archived and is closed to further replies.

Go to topic listing

  • Recently Browsing   0 members

    • No registered users viewing this page.

  • Forum Statistics

    250.3k
    Total Topics
    2.7m
    Total Posts

  • Member Statistics

    342,739
    Total Members
    8,960
    Most Online
    chfkief
    Newest Member
    chfkief
    Joined

  • Who's Online   1 Member, 0 Anonymous, 1,573 Guests (See full list)

  • Latest Articles

  • Posts

    • Chuck FB
      Joke Thread

      By Chuck FB · Posted

      Fred was in the fertilized egg business. He had several hundred young pullets, and ten roosters to fertilize the eggs He kept records, and any rooster not performing went into the soup pot and was replaced. This took a lot of time, so he bought some tiny bells and attached them to his roosters. Each bell had a different tone, so he could tell from a distance, which rooster was performing. Now, he could sit on the porch and fill out an efficiency report by just listening to the bells. Fred's favourite rooster, old Butch, was a very fine specimen, but this morning he noticed old Butch's bell hadn't rung at all! When he went to investigate, he saw the other roosters were busy chasing pullets, bells-a-ringing, but the pullets, hearing the roosters coming, would run for cover. To Fred's amazement, old Butch had his bell in his beak, so it couldn't ring. He'd sneak up on a pullet, do his job and walk on to the next one. Fred was so proud of old Butch, he entered him in the City Show and he became an overnight sensation among the judges. The result was the judges not only awarded old Butch the "No Bell Piece Prize," but they also awarded him the "Pulletsurprise" as well. Clearly old Butch was a politician in the making. Who else but a politician could figure out how to win two of the most coveted awards on our planet by being the best at sneaking up on the unsuspecting populace and screwing them when they weren't paying attention. Vote carefully in the next election, you can't always hear the bells.
    • chfkief
      FS: Black Bear Performance AutoCal Tuning System

      By chfkief · Posted

      Do you still have?
    • 3CarSeatDad
      High Country Suburban build confirmation

      By 3CarSeatDad · Posted

      Can someone confirm if the GM order workbench terminal is able to validate a custom build sequence:   1) Initialize the Allocation Base: Open a new vehicle build queue, select the 2026 Chevrolet Suburban 4WD, and pick the High Country (3LZ Preferred Equipment Group).   2) Select the Diesel Powertrain: Go directly to the engine configuration screen and choose RPO code LZ0 (3.0L Duramax Turbo-Diesel). Ensure it maps to the MHS 10-speed automatic transmission.   3) Deploy the Seating Swap: Navigate to the Interior Options screen and enter RPO code ATT to replace the standard captain's chairs with the power-release 60/40 bench seat. Because you are not trying to force a separate luxury or air-suspension bundle, the standard, premium D07 Fixed Floor Console remains active. The system will accept this change immediately without triggering a warning message.   3)Apply Heavy-Duty Hauling Capability: Input RPO code NHT (Max Trailering Package). The commercial terminal will automatically bundle the required trailering hardware and software modules to support the diesel engine's maximum towing capacity.   5) Layer the Premium Tech and Glass: Separately add code C3U (Panoramic Power Sunroof) and code UKL (Super Cruise) to the order screen.   6) Run the Final Validation: Click the "Validate Order" button at the bottom of the interface.
    • revmanii
      Looking at ordering a '26 WT because I want a std cab, std bed

      By revmanii · Posted

      Spent the last hour or 2 googling and reading up on the spacer thing. I don't like the loss of thread contact on the slip on spacers, but it appears you can get "extended" lug nuts that reach into the hole of the wheel to get back the lost threads. Looks like the only true hubcentric slip on spacers are at least .375". I'd want as little as I could get away with and don't want to cause other clearance issues going any thicker. Bora seems to offer what appears to be a well made .375" spacer and extended lug nuts. I searched here and did find a couple threads recommending Bora. But not cheap. By the time I buy spacers and lugs, new TPMS sensors, then pay a tire shop to install the new sensors, I suspect I'm going to be in over $400. Thinking about running out and getting some washers to put behind the wheel to see if .375" is enough to clear calipers, turn lock to lock without rubbing, and to see if the wheels/tires look strange pushed out a little. This would just be to check fitment.
    • Core-Lokt
      Road Master Active Suspension

      By Core-Lokt · Posted

      Roadmaster makes some quality parts; I have their sway bar. I considered the RAS, but I ended up bagging. I didn't know what kind of ride I'd get with RAS, and the bags have interior jounce bumpers, so I can run 0 pounds pressure. I figured I'd have the best of normal suspension ride with assist on-demand. But it seems you got pretty much the same in one item.

  • GM-Trucks.com Clubs

  • Popular Contributors

×
×
  • Create New...