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    4.3 liter heavy duty version

    In my quest for knowledge about the gmt400s I've came across multiple incidences of a 4.3 liter heavy duty version which came on 2500s with 8500 pound gvwr and above. It had 5 less hp than the standard duty 4.3 and 5 less lb torque. Does anyone know the difference between the two? Im curious...
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    High volume oil pumps

    Has anyone here installed one of these? I have a 4.3 liter that runs 30-35 psi and I'm going to be replacing oil cooler lines, oil cooler gasket and the pan gasket (all leaking). If I get one of these pumps I'd like to know if id have to clearance the pan. I called melling and they said its a...
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    Hub centric wheel spacers

    I have some rubbing on my tires and I'm thinking about getting some 1.5 inch spacers...I know a lot of people don't like them but I want to keep my stock rims and don't want to dish out a bunch of money for rims with less back spacing. That being said I'd like to know if anyone else uses them or...
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    rear suspension torque specs

    I have a 1991 gmc Sierra and my repair manual is missing, could someone tell me the leaf spring front eyelet bolt torque specs, the rear eyelet bolt torque, the shackle to mount bolt torque and the u bolt torque. Thanks.
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    body lift pics and questions

    I ordered a performance accessories 3 inch body lift a few days ago and I've been prepping my truck and its rusty bolts for the install. Does anyone have pics of how much manual 4wd shifter sticks out after the install and how a manual transmission shifter looks after the install? Did anyone...
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    body lifts

    What is the smallest body lift kit I can get for one of these trucks? I can only find 2 and 3 inch kits, is there any 1 inch lifts?
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    14 bolt help! Small hole in tube

    I finally bought a 14 bolt today for 120 bucks. I plan on rebuilding it, but I found a problem while wire brushing rust, there is a 1/8 inch hole in the tube where the old shackles rubbed the tube. What do I do now and has anyone else had this problem?
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    electric fan accessory switch

    Can someone let me know what wire to connect my electric fan to on my 1991 gmc k1500. I'm tired of the fan running when the truck is off. I have the control module that allows it to come on and turn off at certain temps but now I just want to know what wire to tap into to get it to shut off when...
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    Light duty brakes to f44 brakes

    I have a 1991 gmc sierra k1500 non f44 truck. I am in the process of upgrading it to the f44 truck. Currently I am replacing the front hubs, rotors, and calipers with the f44 parts. For now I can only do the front, I don't have the money for a 14 bolt yet. But I am wondering if I should upgrade...
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    Cab corner problems and solutions

    I was working on my truck today and found out my drivers side cab corner is pretty rusted considering I pushed on it and dented it haha. Anyway I know I'll have to replace it but I'm curious as to how common this problem is with these trucks and what kind of ideas are out there to prevent it.
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    33s on gm 16x6.5 steel rims

    Would like to see what 33s look like on the gm steel wheels, at least tell the type of tires and size. Like to hear what are some of the better tire combos with these wheels.
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    Upgrade non f44 chassis to f44 chassis

    I've been curious if I could update my trucks front suspension and brakes to the f44 brakes and hubs. Everything is original and needs changed from rotors to pads and calipers. Can I upgrade to the f44 rotors and calipers without changing the master cylinder? What is the real difference between...

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