What's new
CK5
Register an account today to become a member! Once signed in, you'll be able to participate on this site by adding your own topics and posts, as well as connect with other members.

2001 3500-HD / 2002 3500-HD - NEW build with 2002 truck now .

8.1 bbc vortec / nv4500 / 4.63 rear 1.5ton truck was a 12ft flatbed dump now 10ft flatbed dump .
Overview Gallery Discussion
Next mod DONE on new bed . Used the tread plate off the headboard cut down and flipped them around and welded them on the rear sides and added 1 each of the same backup led lights as the rear has .

Here is the performance of just 1 shooting out the side . I can say looking in my mirror i can see behind me and now beside me real good .

And just to meat the need need of my OCD i matched the angle on the sides aa the rear lights .

20210913_204057.jpg

20210913_204134.jpg
 
Got my FREE picked up off the road mud flap . . Then my purchased 1 showed up today . I mounted them up tonight after work. I think it MAKES the truck . Worst part the better YELLOW is on left and was road free unit . . Paid for unit half as much yellow is right size .

Also trimmed off the lower end of the tail pan 2.25" and this got me what was needed to do full dump action without hitting the trailer hitch .

20210914_195059.jpg

20210914_183919.jpg
 
so almost 1,700 miles in to this ol girl and all i can say is i am on the hunt for truck #2 . . . :bow:

already scoping out another 01 but its a 8.1/auto truck no dump 11ft bed . has cruise / a/c / power seats . . . had a reman engine installed around the mileage time they say the early 8.1L had the problem .
 
sweetk30 said:
so almost 1,700 miles in to this ol girl and all i can say is i am on the hunt for truck #2 . . . :bow:

already scoping out another 01 but its a 8.1/auto truck no dump 11ft bed . has cruise / a/c / power seats . . . had a reman engine installed around the mileage time they say the early 8.1L had the problem .
Click to expand...
What problem?
 
sweetk30 said:
The 50k mile or less thing i have read a few times . Oil pump problem if i recall . Miles on it now and when egine swapped add up to this area of miles problem if i had to guess .
Click to expand...
The only oil pump issue I remember was around 2005. The supplier of the oil pump driveshaft changed something about the metallurgy and was causing the ears that went into the pump to snap off in the pump. Pump stopped running and would starve the engine for oil. It was a small part of the production population and most of the time they would fail in the first 1500 miles or less. IF the driver shut it off as soon as the light came on you could get away with putting another pump driveshaft in it.

I had one RV in transit to a dealer loose one in NM. I didn't risk it and had them get a new engine. I brought the used engine home and it ended up in Larry's Suburban.
All we did was put the pump shaft in. We did check the rod and main bearings and they were ok.
 
Hay @ZooMad75 i found some stuff on line saying the fuel sender OHMS is the normal 0-90 range . But you told me 40-250 on this one . . Wounder if older was older range ?
 
Looking back at the manual the 2001 3500hd works on the 40-250 ohm scale for both the single and dual tank setups.
 
@ZooMad75

So if one wanted to fool the system with a resistor between the 2 wires do you know anything about this ?

I do plan this winter to run new wires and ditch the system and have the local dealer reflash the pcm to single .
 
Knowing how GM programming is vin based I'm not sure the local dealer can actually turn "off" the second tank.

They will get the VIN from the programming system when they plug into the truck. GM will only show what is available for that vehicle based on it's option content. So if it came with dual tanks it's not going to have the calibration for single tank operation.

This does have a fuel pump balance module anyway. That is what is turning the transfer pump on and off and sending an average reading of the two tank level sensors to the pcm for that to pass onto the cluster.

So you can fake it with a resistance value in place of the rear sending unit. The problem I see is if you put either a 240 ohm resistor or a 40 ohm resistor the gauge is either going to have you run out of fuel at a half tank (240 ohm resistor) or not be able to fill up past 1/2 tank (40 ohm)

The system averages the values. So if the front tank is empty and the rear tank is full it's going to show 1/2 tank. If you fill the front tank and it thinks the rear is empty it's not going to show past 1/2.

I'd say eliminate the balance module completely, but that module is what is providing the 5v signal for the main sending unit. On a single tank that feed would be from the ECM.
 
Last edited:
Ordered TAYLOR plug wires # 79286 in 10.4mm size like the 8.1L guys on here say to run . Also a set of ACDelco double platinum plugs and there is a rebate on them so i am getting $16.00 back on the set . Got the set shipped for $55.00 off rock auto for just under 1/2 price of reg store prices and saved around $3.00 with the discount code .

Going to check my fuel pressure and adjust it up maybe . Already started running prem gas octane fuel after a few weeks of 87 octane and my self and helper each noticed a bit better power fell in the way it pulls the trailer .
 
Info in the 8.1L thread says it gets rid of a skip undsr low rpm load and all around better running . I figure these guys know the 8.1 engines so fun what they know WORKS
 
mrk5 said:
What's the advantage with 10.4mm wires?
Click to expand...
Mo powah!

Main reason is it cures the ignition breaking up if you lug it in a higher gear at low speeds. I've felt it with stock wires and creeping in 3rd or 4th had the 8.1 sputtering. It's an odd way to drive one but the 8.1 has the torque to pull it.

In Moab I found between obstacles I was cruising in low range and 3/4 on the trans a lot. The engine is barely running at idle and it don't miss or sputter. You can almost hear each cylinder fire it's going so slow. They won't run like that with the teeny wires that are stock.
 
ZooMad75 said:
Mo powah!

Main reason is it cures the ignition breaking up if you lug it in a higher gear at low speeds. I've felt it with stock wires and creeping in 3rd or 4th had the 8.1 sputtering. It's an odd way to drive one but the 8.1 has the torque to pull it.

In Moab I found between obstacles I was cruising in low range and 3/4 on the trans a lot. The engine is barely running at idle and it don't miss or sputter. You can almost hear each cylinder fire it's going so slow. They won't run like that with the teeny wires that are stock.
Click to expand...
Interesting. I lug the 454 a fair bit on the trail because I tend to run the 4l80 in manual mode. I'll have to pay closer attention to how it runs and see if maybe I could benefit from the bigger wires.
 
You must log in or register to reply here.

Latest Posts

Top Bottom