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  1. B

    Differential compatibility

    K1500 differential won't work? Put 5 lug axles on it? Have one I could get for nothing but for some reason thought it wouldn't work. Can't recall why.
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    Differential compatibility

    I have a 97 c1500. What year rear differentials would be compatible? Were 4.10 a common option or should I just have mine rebuilt,? thanks
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    How to get gauge working??

    Now I need figure out why that wire wasn't consistent 5v and where it came from. Lol.
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    How to get gauge working??

    I edited my post when you replied. May be info there you would find interesting and missed. About sender and the buffer output. Yeah. Far as I can tell it's fine It sweeped when I turn key on and went back to 3/4 full which should be about right.
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    How to get gauge working??

    First off. I appreciate your help through this, as otherwise I would have never figured this out. Those diagrams are priceless. The sender units are totally different. The opening for the lock ring is way smaller on the v8 unit. The v8 is all metal sender. 4.3 was plastic, 4.3 uses quick...
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    How to get gauge working??

    So today I learned some things the hard way, after removing the truck bed. I test fuel pressure other day and it was a little off spec, so I put a dw200 in the factory module. Had planned use an ac delco sender for a 5.7 but as it turns out. It will not fit 4.3 tank. Why gm made different...
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    How to get gauge working??

    I wonder why the buffer is ground on the pcm and why buffer pin D also went pcm. There's also a green wire from in tank pressure sensor, dk green that was cut at the 4 pin connector on firewall but its showing it goes to vcm 25 evap.. So 3couple wires probably causing this issue. Vcm 25 evap...
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    How to get gauge working??

    There is a fifth connector on top of the pcm.
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    How to get gauge working??

    That's what's confusing. Is the one green/white pin D on buffer, did go to the 5.7 pcm in my truck.. But I left it out, as the 96 pinout sheet had it marked as unused. So then I thought my 5.7 pcm may be a 98 pcm but then it's my understanding the buffer module was only used in 97 models. So...
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    How to get gauge working??

    Do you have the page 1 and 2 for that schematic?
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    How to get gauge working??

    Sorry, AK49BWL, I didn't even realize you had replied till I went type .
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    Nv3500 to 5.3 pedal feel

    Hold up there, dont get too technical my brain is still on dial up. Lol. Yeah I get what your saying. Today it shift into reverse fine. No hint of grinding. And the truck had sat for over a day, so if it was going bleed down. It had plenty time do it. But pedal feel is still easy compared...
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    How to get gauge working??

    So after trying bypass the fuel buffer module, it finally sunk in that the buffer converts the varying resistance/ground signal from fuel sender to a voltage signal, that goes to the gauge. So next step is remove cluster and figure out why the fuel gauge isn't grounded
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    Nv3500 to 5.3 pedal feel

    How would it get air in it? I didn't touch the hydraulics. I unbolted trans and slide it back enough to switch engines,. Won't hurt to bleed it but seems like being untouched, thst variable shouldn't have changed.
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    Ls swap fuel gauge ??

    So after trying bypass the fuel buffer module, it finally sunk in that the buffer converts the varying resistance/ground signal from fuel sender to a voltage signal, that goes to the gauge. So next step is remove cluster and figure out why the fuel gauge isn't grounded.
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    Nv3500 to 5.3 pedal feel

    Just noticed you replied. Finally test drove the truck today. Clutch master was full. I've never put any fluid in it. So no leaks. Had trouble getting it into reverse. But forward gears were fine. Pedal is still crazy soft as compared to before. I stopped on a hill put it in first. Engine off...
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    How to get gauge working??

    So this is what I've found so far. Ohm meter across purple and ground, at square 4 pin connector at firewall, does vary. It was .15 ohms when tank was emptyish and near 100 ohms when I filled tank up. Supposed be 0-90 so close enough. I put ground wire to the purple/white output on the buffer...
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    Ls swap fuel gauge ??

    So this is what I've found so far. Ohm meter across purple and ground, at square 4 pin connector at firewall, does vary. It was .15 ohms when tank was emptyish and near 100 ohms when I filled tank up. Supposed be 0-90 so close enough. I put ground wire to the purple/white output on the buffer...
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    How to get gauge working??

    This will be long but im going present what ive found and hope someone can fill in the pieces im missing. I have a 97 cheyanne. Originally a 4.3, previous owner swapped in a vortec 5.7. It ran fine, everything worked for couple years as it should,. I recently put 5.3 in and combined...
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    Ls swap fuel gauge ??

    As of right now I'm stumped. Tested purple/white wire from fuel pump and found 12v. Should be ohm resistance. Then I test negative cable disconnected to negative post and found 5v. Then switch continuity test. Removed the 2 positive cables that are on my battery. The positive to starter shown...
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    Ls swap fuel gauge ??

    I didn't touch the fuel side, my year pump is supposedly fine for ls swap. I disconnected the lines at the firewall and bought pfte adapter to go to ls quick connects. Was able test the buffer module behind the glove box and I was getting voltage on the purple wires black/white low reference...
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    Ls swap fuel gauge ??

    Have 97 c1500. Put a 2004 5.3 in it. So far only test it idling but it idled fine and gauges did what they should. But of all things that possibly could go wrong, noticed the fuel gauge is past full, 3 o'clock position and stuck there. I've had truck for few years and no issue before. I'm...
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    Ls swap wire question

    Finally figured out the mystery brown wire, went to a transmission connector, some option my truck wasn't utilizing. None of the schematics I found, made any sense in regard figuring that one out. Went over the lt1swap videos and he made reference to that wire and even he wasn't sure...
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    Ls swap wire question

    So the mystery wire I've clipped, is. Brown, goes to D8 on c100 connector, and is on circuit 441. I've found it in the schematic link at the end of this message, but unfortunately. I'm terrible at reading schematics. First thought it was a power wire but it's extremely long and I recall...
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    Ls swap wire question

    I meant the 2004 green connector pinout 49 for the abs wire. They are both yellow, I'll try that. I'm still not sure about the brown inj 3 wire. Haven't had a chance mess with it but hopefully soon.

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