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What did you do with your GMT400 today...or yesterday....

dbrannon79 said:
now I am gonna have to check my speedo and see how far it's off. I will do that maybe tomorrow, removing and installing 8 wheels plus two wheel spacers I'm wore out! the 93 had 2" spacers behind those factory rims so the center caps would fit over the axle hubs. eventually I will get the correct center caps for them and not need those spacers. I also think I have another set of factory steel rims but need the center caps and beauty rings to make them a full set. I would like both trucks to have their factory look. I also need to find some side steps for the 93 too. Wife's gonna be complaining about climbing in LOL
Click to expand...
We've checked our speedometers with our old suction cup Garmin.

I check my speedos by the reactions of the people around me.
 
So, what's everyone's opinion here?

What did you do with your GMT400 today...or yesterday....

This evening I decided to give these Volkswagen brake shields a go and mount them to my 96 Chevy truck.I’m pretty sure I can make these work by drilling and tapping three holes in the steering knuckle.It may need a slight trim here and there but I don’t mind doing that.These are from Amazon and...
www.thetruckstop.us

Whats the thoughts on this rim style vs the factory steelies? I might be able to find some center caps that show the Chevy logo.

I also thought about one day converting this one to have a short bed. don't know what would be involved in moving the diff forward or if there are spring hangers made to do that kind of conversion properly and still keep the factory rake. But I know the bed is dinged up behind the wheels and the passenger side has been cut off on the lower panel.

If I was to turn this one into a short bed, I think I would want a step-side, but not sure what it would look like. being short would also help with the turning radius too! maybe some of you guys might know what the easiest way would be to turn a long bed into a short bed and do it on the cheaper side, like finding what other truck's front spring hangers would work vs buying something aftermarket.
 
dbrannon79 said:
So, what's everyone's opinion here?

What did you do with your GMT400 today...or yesterday....

This evening I decided to give these Volkswagen brake shields a go and mount them to my 96 Chevy truck.I’m pretty sure I can make these work by drilling and tapping three holes in the steering knuckle.It may need a slight trim here and there but I don’t mind doing that.These are from Amazon and...
www.thetruckstop.us

Whats the thoughts on this rim style vs the factory steelies? I might be able to find some center caps that show the Chevy logo.

I also thought about one day converting this one to have a short bed. don't know what would be involved in moving the diff forward or if there are spring hangers made to do that kind of conversion properly and still keep the factory rake. But I know the bed is dinged up behind the wheels and the passenger side has been cut off on the lower panel.

If I was to turn this one into a short bed, I think I would want a step-side, but not sure what it would look like. being short would also help with the turning radius too! maybe some of you guys might know what the easiest way would be to turn a long bed into a short bed and do it on the cheaper side, like finding what other truck's front spring hangers would work vs buying something aftermarket.
Click to expand...
Time to go truck shopping. 😹😹😹
Distance between the rear spring hangers and cab mounts needs to be removed.
 
New batteries. Battery heater on passenger side.
Opened the hood and that blanket is nice and warm.
Turned the key to run, WTS lamp extinguished, twisted to start, it fired so fast I could not tell how fast the engine was spinning before it fired.
Seems all the money spent is becoming worth while.
Have it on high idle, IIRC 1800 RPMs, making sure fuel will not jello at near 10 above zero F then after it warms some more going to attempt a trip to church this morning.
After I make it back home, going to add more No.1 fuel to the mix.
Suppose to hit -25*F on Monday or Tuesday and I want no problems trying to get to work and home again.
 
To church and back home.
With the couple of miles I put on the truck, then, this morning stepping up the idle to about 1800RPMs for at least a half an hour, then to Rosebud to church and returned. ODO read 72 miles and it took 5.5 gallons of No.1.
I think I now have enough No.1 blended in so it should be able to withstand this -25+ F below zero thats on its way, if the Oldsmobile fails.
 
Installation of the Dash Skin is completed on the ‘99. I tried to fit the suggest 3D printed carbon fiber fiber strengtheners over the Dash Skin, but they never allowed the attaching screws to bite, so they were not usable. That was $40 plus $24 for the can of great paint wasted.

The Dash Skin came w/o holes for the screws, so it was not designed for the screws to go through it. As all three of my screws had broken through the original dash, I needed something to hold it. So I drilled the Dask Skin and was able to get 2 of 3 screws in. I will revisit the third.

The Dask Skin does as billed, but it is no the structural end all solution for the dash. For that I think you’d need a replacement dash. It looks good, but not sure it will stop the rattling.


IMG_7298.jpegIMG_7299.jpegIMG_7300.jpegIMG_7301.jpegIMG_7302.jpeg
 
Today, dinner time, drove home the truck. Left it idling, stepped up on switch 1. IIRC, 900 or 1,000 RPMs. Came back out about fifteen to twenty minits later, LP pressure on 0.
Jumpered the Oldsmobile and put the truck into the garage.
IDK, maybe them fuel filters was suffering after the gelling experience. It was only -5 degrees F at lunch time. I think it was -18 below when I went to work and no problems.
I’m about atta loss with this lift pump pressure in this cold weather.
Is it because of that summer blend fuel. I do have about 12 gallons of No.1 in the tank and it should be fairly well blended by now.
So last night after work changed fuel filters, all three, installed the other battery blanket and now have two cords hanging from under the hood.
Blankets and block heater.
Next will be a battery tender.
I had no such problems last winter but then I had been driving and burning winter blend fuel right up to and through the cold weather and keeping a healthy dose of No.1 at each tank filling.
 
MrMarty51 said:
Today, dinner time, drove home the truck. Left it idling, stepped up on switch 1. IIRC, 900 or 1,000 RPMs. Came back out about fifteen to twenty minits later, LP pressure on 0.
Jumpered the Oldsmobile and put the truck into the garage.
IDK, maybe them fuel filters was suffering after the gelling experience. It was only -5 degrees F at lunch time. I think it was -18 below when I went to work and no problems.
I’m about atta loss with this lift pump pressure in this cold weather.
Is it because of that summer blend fuel. I do have about 12 gallons of No.1 in the tank and it should be fairly well blended by now.
So last night after work changed fuel filters, all three, installed the other battery blanket and now have two cords hanging from under the hood.
Blankets and block heater.
Next will be a battery tender.
I had no such problems last winter but then I had been driving and burning winter blend fuel right up to and through the cold weather and keeping a healthy dose of No.1 at each tank filling.
Click to expand...
Use the antigel additives.

If you have Biodiesel - B4 or higher. Double dose

Messing around, you're going to kill your lift pump.

I mostly use either white Power Service or whatever I have around.

I like Optilube.

I don't like any antigel additive that has to be kept warm until it's mixed with diesel.

I used to keep bottles in the truck to add when I got fuel on the road. If they gelled in the tool box, I never bought them again.

Winter Anti-Gel Diesel Fuel Additives (BLUE)

www.opti-lube.com www.opti-lube.com







.
 
Will L. said:
Could be.
Also could be something wrong in the fuel system.
You have a list in your signature but nothing about the fuel system-
Walk me through your fuel system-
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Airdog.
quadstartuning.com

AirDog Lift Pump System

Complete, filtered, fuel system upgrades for your 6.5L diesel! These kits will replace your stock tank strainer sock, lift pump, and filters; replacing them all with the best quality modern components available. We offer a few different lift pump setups to suit different needs. The main reason...
quadstartuning.com quadstartuning.com
Installed that same time as the new engine.
Also installed Leroys pendulum sending unit/pickup tube assembly.
Kept the FTB FFM and installed a sending unit at the IP and another at the LP.
I had fueled the truck during the warm fall weather, was going to rebuild my engine but orderd the new Optimizer. That took some time, then assembling the components to the engine, ordering parts and components, putting it all together took it to the cold months.
Stuck with a tank full of summer blend fuel.
When it was below zero, drove the truck less than a mile to the bulk fuel station and it was gelled up most the way there. Got in 6 gallons of No.1 and had a hella time getting it back home.
Added some Stanadyne 1,000 to the tank, figured 4 ounces to the 30 gallon tank but I poured in about 6.
Got a warming spell then drove it the 60 mile round trip to church and home, got in another 5 gals of No.1.
With this cold spell predicted I added about another six or so ounces of the 1000. Drove it about 5 miles after that Then it set on 1500 or so high idle for about a half an hour, to work about a mile and it set and warmed there in the about 900RPM high idle, to home yesterday and let it set on the 900 high idle for about 20 minutes. Got in the truck and FP was on 0 on both sending units.
I drove it into the garage and about as soon as i was ready to shut it off FP went to normal 9 pounds. Didnt have time to diagnose it then.
let it warm for the afternoon. Changed fuel filters after work. Before changing filters FP was still reading 9 pounds.
This evening going to cut the filters open and see whats within.
 
Last edited:
Ok- so both pressure gauges were zero?

The gauge on the LP- is it on the output of the lift pump or before the lift pump?

Did you install a heater in the liftpump pump? The better (finer micron) filters can gel easier than larger flow units. Like the airdogg ff-2 is a 2 micron and the ffm Declo unit is 5 microns. This is the biggest drawback of better filters, so airdogg & fass offer screw in heaters for their liftpumps.

The airdogg should be fine- that doesn’t hurt them as bad as it does the other design
 
Will L. said:
Ok- so both pressure gauges were zero?

The gauge on the LP- is it on the output of the lift pump or before the lift pump?

Did you install a heater in the liftpump pump? The better (finer micron) filters can gel easier than larger flow units. Like the airdogg ff-2 is a 2 micron and the ffm Declo unit is 5 microns. This is the biggest drawback of better filters, so airdogg & fass offer screw in heaters for their liftpumps.

The airdogg should be fine- that doesn’t hurt them as bad as it does the other design
Click to expand...
Yes, both gauges were on zero.
The AD lift pump has a port for a sending unit/gauge.
It seems to be post pressure regulator as it shows a maximum of about 10 PSI.
Only heater is on the FFM. I’ll get the AD heater on the way.
I just can not fathom that this is giving me this many problems.
Two or three winters and not one problem with fuel, only with failed LPs.
 
@MrMarty51 what are your outdoor temps currently? I would try taking a sample of fuel from the system and ether let it sit outside in the cold or put it in the freezer just to see if the problem is gelling and if so, what roundabout temp is it gelling at. Idk if fuel works the same as water in a sense when it's flowing through the lines it won't gell like when you let your faucets drip, but I would suspect it's gelling up in the lines before or after the LP.

it could also be that the tank is fully gelled and has not been able to fully thaw and mix well with the #1 or the additive. it's like trying to thaw a turkey that's frozen solid. if that tank is full and fully gelled or froze, it's gonna take a few days of warm weather to fully thaw. you might have globs of gelly in the tank and possibly getting sucked to the pickup tube creating a restriction.
 
One way to eliminate the theory on the tank not fully thawed, if you have enough fuel cans, rig you up a pump to siphon the tank out into fuel cans. then go fill up with fresh #1 treated. but before filling up, dump about 5 gallons of #1 in there and go drive, drive it like sloshing the tank real good and long enough that the return fuel from the engine has warmed the 5 gallons to the point it's had the chance to melt any left over globs of gelly, then go fill up with #1 treated. alternatively you can pre-warm the 5 gallons of #1 before dumping it into the tank too, but still get it sloshed around in there good before filling up.

save on the fuel you siphoned out for when warmer weather comes / test freeze it making sure it's not gonna gell up before mixing it back into the tank.
 
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