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

FSO doesn’t add up to me because that solenoid is either on or off.

Plugging intermittent return line is a possibility- but doesn’t feel right with your description.
I just ran out there to look at it. it's still connected but my rigging is a wire ran through the hole in the spade and folded over then a normal male spade crimped on to that wire connecting to the female spade in the harness. not great but it's what I had done when I first got the truck running when I bought it. then neglected to go back and fix it right!! oopsies!
 
Nothing more permanent than a quick fix to get home! 😂
If you did get water in the fuel- the factory filter is maxed by time it turns on the light. Filter change now.
This is the part where I promote FASS water separator filter. I like the fass LP with filters because it’s designed to work together and does it well. But if that isn’t an option, consider getting just the filter & a stand alone base.

A buddy in Salt Lake City did his that way for a ford, he got a bad dose of water and had the truck stall on the hiway. Because he heard me yelling about fuel pressure gauges for years- he saw his plugging up as he drove down the road.
He pulls over, drains some fuel then spins off and dumps the filter on the side of the road, runs his electric pump to refill system. Starts truck, pressure goes up some and he makes U turn back to the fuel station.

He goes in asking for manager and tells people as he goes past- “don’t buy fuel right now, it’s full of water.” Talks to manager, who just took his $100 bill a little bit ago. Starts truck to show how it’s running rough- They pump from his tank into a container after pouring in another filter worth.

Manager has him pump his entire tank into the main fuel tanks at the station. Manager shuts down all pumps- then drives across street and fills a small fuel can to put in his truck tank. Manager gives him $300 cash with apologies He drives across street where the manager put another $100 on a pump for him to fill up. Manager was Super glad it was an old diesel not a new cp style truck.

My recommendation when you have water- drain that tank and at a minimum use the water separator funnel- but even then- the price of a tank of fuel vs replacing ip & injectors makes the safer choice that you just have a bunch on weed killer now.
 
Yep Wouldn't be a bad idea to get a new filter!! I will plan that along with checking the fuel for water. I really hope it's simply my permanent jerry rigging that's the issue LOL

I couldn't imagine what would happen if water even the slightest amount made it past the OEM style filter into the IP
 
Well I think I determined what is happening with my truck! the same thing happened again at the same intersection this morning on the way to work! slowing down from 60 going into the turn lane and the RPM gets really low, starts chugging and almost stalls out. when I noticed it I followed @Will L. recommendation and popped it into neutral. RPM came back. when it was time to take off I switched it back into drive and it was fine the rest if the way to work.

The lockup in the TCC is not releasing!! What do I do now!! This truck uses the TCI aftermarket trans controller and I have not had any issues with it in the past! Though the trans has always had a hard shift from 1st to 2nd since I got it running. plus the PO said it was fully rebuilt back in 2018.
 
Well I think I determined what is happening with my truck! the same thing happened again at the same intersection this morning on the way to work! slowing down from 60 going into the turn lane and the RPM gets really low, starts chugging and almost stalls out. when I noticed it I followed @Will L. recommendation and popped it into neutral. RPM came back. when it was time to take off I switched it back into drive and it was fine the rest if the way to work.

The lockup in the TCC is not releasing!! What do I do now!! This truck uses the TCI aftermarket trans controller and I have not had any issues with it in the past! Though the trans has always had a hard shift from 1st to 2nd since I got it running. plus the PO said it was fully rebuilt back in 2018.
Its just a solenoid inside the transmission pan. Easy enough to change out.
I once had to do one on my 1987 K1500, twenty below and in a snow drift.
It was an easy enough task but that snow and cold was not a nice situation.
That was on a new reman transmission.
The co. Sent over transmission fluid, a new internal wire harness and that solenoid.
They also sent me a check for $150.00 for the troubles. 😹😹😹😹
 
Found the TCC PWM solenoid. placed the order to arrive this Satuday. according to RA I need two of the?? One is for the downshift 3-2.

I am wondering if I should also replace the 1-2 shift solenoid too. I can't find a good quality harness and get it by this weekend so I will just plan on doing the solenoid and see if that helps.

1778773671646.png
 
went ahead and ordered the 1-2 shift solenoid too. figured might as well since I have already replaced the ECP solenoid a while back and it hasn't seemed to fix the hard 1-2 shift. good thing is this pan has a drain plug so I won't make too much of a mess and I can save on the fluid this time!

I used a GM re-usable gasket when I had the pan off last time too so that's a plus. it should still be clean too. it hasn't been too long since I had done this.

1778775451330.png
 
This weekend is going to be fun filled!! I have our friends Mercedes I had already promised to try and fix a power steering leak on, plus bringing the ole'Betsey the dodge ram back up to par for the road for my daughter since her car is out of commission from the hit and run. now the "hope and prayer" trans fix on my 93.
 
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