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    Speedo/mph not working and transmission not shifting

    Check continuity between VSS and buffer, 15 amp fuse, ground, likely something with buffer or signal to it because both speedo and trans are not working and they are separate feeds to ECM and cluster. Scan tool would also check for inputs to ECM.
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    1989 K3500 SRW Brake Upgrade

    I am sorry for the delayed responce. Yes I was able to keep a working parking brake. I had to get creative with a couple of parking brake pieces to get it to work. I used a short cable from a Dodge truck I think, it was like 10 inches long to get me closer to the 2001 truck cables. I had to weld...
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    1989 K3500 SRW Brake Upgrade

    I still love how well it tows. More power and mileage than the 454 ever had. I had to tow a Jeep Wrangler on my car trailer behind my 2005 Silverado 1500 5.3 while I was doing this swap and it reminded me of how much less power the L33 has than a 8100. It towed no problem but there was no...
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    1989 K3500 SRW Brake Upgrade

    This is with the hydroboost lines re-connected.
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    1989 K3500 SRW Brake Upgrade

    I welded the studs on the original mount and put everything on the truck. The hydoboost unit is from a 2004 Avalanche. I has the larger accumulator and came with the proportioning valve seen in the picture. I used it because it was readily available at the wrecking yard when I went there one day.
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    1989 K3500 SRW Brake Upgrade

    At this point in the swap I wanted to swap to the GMT800 master cylinder. My thoughts were fluid capacity for the giant calipers, 1/4" brake lines on both front and rear for the big calipers and a larger bore to feed the big calipers. The size of the master cylinder where it fits into the...
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    1989 K3500 SRW Brake Upgrade

    The lower shock bolt mount on the 1999 lower control arm worked. I had to pull out the shock and press out the lower steel bushing and shorten it and reinstall it.
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    1989 K3500 SRW Brake Upgrade

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    1989 K3500 SRW Brake Upgrade

    The rear axle is the 14 bolt. I was 1.5" wider than the original rear axle but that was only .75" per side and it is barely noticable.
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    1989 K3500 SRW Brake Upgrade

    I installed the front lower control arms and knuckles and all the 2002 2500HD brakes on the front. The 2002 brake hoses worked with some modifications to the mounting bracket. I used a tapered reamer that was 2 inched per foot to ream the upper ball joint hole. I made a 3/16" thick large washer...
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    1989 K3500 SRW Brake Upgrade

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    1989 K3500 SRW Brake Upgrade

    I decided to try the brake upgrade that Lawrence Tolman was showing on his Youtube channel. I have a 1989 K3500 SRW. I got a set of knuckles and lower control arms from a 1999 Silverado 2500 and a complete rear axle from a 2002 Silverado 2500HD. I started with the rear and removed all the...
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    Show off your valve covers and engine bays

    8100 in my 1989 K3500.
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    1989 K3500 8.1 Liter

    My car is about 3600 pounds with out me in it. There was a delay at the start line with an oil spill I think and I got talking to the starting line official. I was asking him if he had a car. He said he did not but liked to play a game with the track ATV to try and cut the best light against the...
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    1989 K3500 8.1 Liter

    The truck is doing good. It is put away for the winter now. It was working good when I put it away. I have been doing some research on going to disc brakes on the rear. Still finding some different opinions on whether or not bolt on caliper brackets will fit. I have brackets that are labelled...
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    1989 K3500 8.1 Liter

    I updated and installed my CTS2. I took the truck for a drive today and it worked well. All it did was show me data. I didn't use the performance meter or anything. It was a bit expensive to be just gauges but I do not really have any other space for stand alone gauges. It will read codes and...
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    1989 K3500 8.1 Liter

    It definitely works well. Better mileage and more power.
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    1989 K3500 8.1 Liter

    I have the stock fuel tank and stock sending unit. I used a fuel pump from a 1995 Chevrolet Astro van. They have a similar steel style of sending unit where the fuel pump is removable not a plastic module. That pump is rated at a max of 85PSI and 35 GPH. I think I would have to be wide open for...
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    1989 K3500 8.1 Liter

    Thanks Eric. The 454 mounts bolted to the 8.1L. When you remove the stock 8.1L mounts there are bosses for the old style clam shell mounts. I used the stock 454 mounts and the metric bolts from the 8.1 mounts. My other block was not this rusty. I did sand blast the holes and run a thread chaser...
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    1989 K3500 8.1 Liter

    Thanks. The car was faster. The only change was the weather. Every year a bunch of friends and I rent the track. This year the date was late. We were worried about the weather but it ended up being perfect. There was a little bit of sun off and on to keep the track warmish. The temperature was...
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    1989 K3500 8.1 Liter

    Sorry for the delay. There has not been much to report. I think I am close to done with the truck. Hopefully just maintenance from here on out. This picture is it loaded up heading to the drag strip. It towed very well. It had triple the power the 454 TBI did. I was even able to pass slow cars...
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    1989 K3500 8.1 Liter

    I wondered why the sensor had 3 wires but only used two of them on this engine. I had debated replacing that sensor but noticed it was worth a small fortune. The 2001 sensor was considerably more expensive than a 2003 one though. I ended up grabbing a connector off of a 1994 C1500 and ordered a...
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    1989 K3500 8.1 Liter

    I am using a new Echlin sensor from NAPA for the 454 threaded into the opposite cylinder head than the 8.1 liter 3 wire gauge for the computer. The head had a 1/2"NPT hole so it fit right in. With the other testing I did I am suspecting the sensor. I also think the gauge read OK on the 454. I...
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    1989 K3500 8.1 Liter

    The temp gauge in the dash still reads high. The scan tool says the engine is at 190 degrees most of the time. The in dash gauge says 250ish and makes the "check gauges" light come on. Using an infrared temp probe on the thermostat housing the temp is about 190 Fahrenheit when the engine is up...
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    1989 K3500 8.1 Liter

    The cruise control was an easy fix once I realized what I had done wrong. I had tied into the TCC brake input wire instead of the CHMSL wire. Instead of getting 12 volts when I stepped on the brake it would take 12 volts away. Since this went well, I installed a set of limiting straps. This way...

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