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#1 |
Registered User
Join Date: May 2015
Location: Tukwila Washington
Posts: 378
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Re: 1990 Chevy K1500
I Put the rear on jack stands and determined the passenger side brake cable was seized. I replaced that and now the parking brake holds. The brake light is on and I get a code 3 “Open Dump Valve or ECU Malfunction”. I’m not sure how to proceed on this, I disconnected the battery to clear the codes, but the brake warning light remains on.
I put some epoxy on the knock sensor and gave it a day to cure. I was poking around underneath and touched the battery wire at the starter. The stud in the solenoid is loose, I can rotate the wire, stud and nut together. The truck starts fine, but it will be a problem on the side of the road. I also noticed a wire on the driver’s side coming from between the rotor and backing plate. It looks like a ’95-up ABS rotor was installed… I’ve been reading about the RWAL system and the brake warning light, Next thing is to ohm out the connector to the dump valve, when I get some time. I want to drive this truck, so I filled up the gas tank and got a load of gravel. The bed went low with ½ yard, my ¾ ton truck handled the weight better, but at least I wasn’t rubbing the 33” tires on this K1500. I pulled my flatbed trailer out of the bushes and went for a drive. The K2500 is partly dismantled and I loaded up the longbed, front clip, hood and bumpers. The scrap yard is paying 1 cent a pound, so maybe $10.00 for these truck parts. I decided to keep them and make an art fence. That bed floor would make a nice shed roof, I couldn’t buy corrugated tin at that price. I’ll put an ad up before I get out the torch… No more check engine or check gauges light and no fluctuating temp and oil gauges. I hope the shorted knock sensor was all that was the problem, only one way to find out, drive! The truck didn’t come with door keys, so I bought a pair of door lock cylinders, when I get time…
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'47 Panel to '88 K2500 Frame Swap Mechanical Speedometer Drive Solution 1947.2 1 ton Chevy Panel 1955.2 Chevy 6700 Bus/RV 1990 Chevy K1500 |
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#2 |
Registered User
Join Date: May 2015
Location: Tukwila Washington
Posts: 378
|
Re: 1990 Chevy K1500
It’s been awhile since I updated this. I replaced the lock cylinders. I don’t remember if I replaced the starter, but probably. I was trying to find a good cheap rack to haul lumber. I could not find one narrow enough for the stepside bed. I did locate a shortbed rack for $150, the price was right so I bought it. We set 2x4’s across my bed and set the rack on that to get it home. I cut the rack rails to fit my bed, and welded with Oxy-Acetylene. I located some kind of nut sert to bolt it to the bed rail. It works well. I have been using this truck for weekend projects since I picked it up a year ago. I decided to drive it to work last week and it started shifting hard on the way home. Grinding when going into reverse, and hard to shift forward gears. Last weekend I checked out the clutch hydraulics. I found no sign of leaks. Dirty fluid, I changed the fluid, and attempted to bleed the clutch system by placing a cinderblock on the pedal and cycling the bleeder valve, I did this several times. That didn’t fix it. I was able to press the clutch, start the truck and release the clutch to move. I drove it to the shop in 1st gear, it would not shift with the engine running. The stick didn’t feel sloppy, so I think that connection is o.k. I had read about a pin breaking where the stick attaches on top. I also read about the pilot bushing binding causing the input shaft to spin. The one post I read about the pilot bushing turned out that replacing it did not fix the issue. This is a 1990, so the transmission is probably a 5LM60. The guy I got it from said he replaced all the fluids, I wonder if something other than GM synchromesh fluid was put in the transmission? It’s been at the shop for a week, still waiting to hear back. They tried bleeding the system with no change.
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'47 Panel to '88 K2500 Frame Swap Mechanical Speedometer Drive Solution 1947.2 1 ton Chevy Panel 1955.2 Chevy 6700 Bus/RV 1990 Chevy K1500 |
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#3 |
Registered User
Join Date: May 2015
Location: Tukwila Washington
Posts: 378
|
Re: 1990 Chevy K1500
Looks like it needs a new clutch...
__________________
'47 Panel to '88 K2500 Frame Swap Mechanical Speedometer Drive Solution 1947.2 1 ton Chevy Panel 1955.2 Chevy 6700 Bus/RV 1990 Chevy K1500 |
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