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    98 C1500 L31 Rear 02 Delete in HPTuners

    So, now that I have my son's truck running (Goodbye Passlock!) I want to tune out the rear o2's using HPTuners. I've done a lot of searching (on the forum, on Youtube, and Google) but everything i've found gives me the impression that deleting the rear o2's is nothing more than unchecking the...
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    98 C1500 Starts but shuts off after 1 - 2 seconds

    My son has a 98 C1500 with the L31 vortec motor. The truck has 210k miles on it. He started having an intermittent issue where the engine will start then shut off after 1 - 2 seconds. Usually, he could cycle the key several times to get the truck to start, but a couple times he had to borrow his...
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    Speedo Issues

    My speedo just started reading 10 mph high. Now, please keep in mind, my truck is not stock, nor does it have any of the factory speedo wiring. No DRAC, No VSSB, etc..... My truck has the TCI EZ-TCU running the factory speedometer. This issue cropped up when I switched from the 93 speedo only...
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    Manual windows/locks to power windows/locks

    I've read BHBurban's write up and searched a lot of forums. I have several questions that I haven't found good answers to. My truck is a 93 RCSB Cheyenne. I would prefer to use the 95+ harness with relays over the 88-94 harness: Will the 95+ harness plug directly into my 93 fuse box? Will the...
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    power distribution block retrofit

    Has anyone retrofitted the underhood power distribution block from a 99+ truck into a 88-94 gmt400? I am in the process of removing all the unnecessary wiring from my truck (all factory computer wiring) and would love to get rid of the fusible links on the firewall and relocate that cluster of...
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    4l80E VSS

    So I am currently swapping my 4L60e over to a built 4L80e. The 4L80 did NOT come with a VSS. Can I use the VSS from my 4L60? I am using an aftermarket controller so I only need the rear VSS, not the ISS. If I can't use the 4L60 VSS, what would you recommend?
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    93 4L60e to 4L80e

    The 60e is headed out the door. Rather than deal with a mediocre piece of ****, I'm going to swap in a 80e. I have most of the wiring figured out (swap white and brown wire at the trans connector, add ISS wiring, etc). My truck is now carb'd, but the stock computer is running the 60e with a...
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    93 A/C Wiring

    Anyone know if the A/C wiring runs through the PCM on a 93 1/2 ton pickup? I'm about to buy the TCI EZ-TCU and have gotten rid of the factory FI. I'm curious if I can completely ditch the factory PCM and wiring. I looked at the wiring diagrams I could find and it doesn't appear to but I would...
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    4L60E late shift all gears (2,3,4)

    TPS is showing 0v - 4.5V at WOT. I noticed this before with the V6 but it wasn't as noticeable as it now with the 350. Shifts into 2nd at 20 mph, 3rd at 40 mph and I haven't gone above 55 mph yet but it did not shift into OD. Trans has a decent 1-2 shift, nothing earth shattering but definitely...
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    TPS sensor wiring

    Anyone know the specifics for the wiring. My truck (93 chevy c1500 4.3 harness) has the round TPS connector and I am converting it to a flat connector. I need to know which wire is ground, 5vdc and sensor output for the carb tps conversion I am using. My chilton manual diagram shows which pin...
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    Removing old harness during swap

    Anyone removed the stock engine harness/computer ect while swapping to an LS motor? If so, was there anything that shouldn't have been removed? I want to get rid of the stock harness completely when I swap my truck. It's a 93 4.3.
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    Dome Light Connector

    Anyone know which slot the connector for the dome light plugs into on the stock junction block under the dash? I thought I took a picture before I ripped everything apart but apparently I didn't. It is a blue connector attached to the orange/white wire running from the dome light on the driver...
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    93 4L60e to 4L80e questions

    Anyone know how I go about keeping the stock speedo without stock computer, etc? The research i've done indicates the VSS is different between the 60 and the 80. Can I swap the 60 VSS in? Do I need to make changes to the harness? PS: The tbi crap is going away and i'm gonna convert the 80 to...
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    Big Block Mk IV vs Gen V/VI

    Pro's/Con's After mulling over doing an LS swap, I think I'm going down the lesser traveled path of going big. Anyone know the differences between the big block generations. Finding a gen v/vi in the junkyard shouldn't be terribly difficult and I'm going carbureted initially so I don't care...
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    Reman steering box with slack

    So I have installed 4 reman boxes across two different trucks (both GMT 400s) within the last 12 months and every single one had 3"-4" of slack after installing. Anyone ever had this phenomenon? I put the Z86 quick ratio box in my 93 RCSB (reman from Oreilly) with all brand new front end parts...
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    93 Chevy RCSB

    I picked up this truck after the hounding the owner (a buddy from work) for the past 3 years. I got it cheap and it is exactly what I wanted. 4.3 V6, 4L60, 254,xxx miles, all original for the most part, a perfect platform imo! As purchased: I have done some cleaning, mounted two BMW...
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    Stock Shackle Length?

    Anyone know what the stock rear shackle length is for a 93 RCSB 2WD? I've done some searching but haven't found anything definitive. Thanks!
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    Quick Ratio Steering Box

    Anybody used the AGR box vs a factory quick ratio box (F41 Monte Carlo SS, WS6 TA) in their truck? It seems getting an AGR is 50/50 on being good out of the box. I can get a new reman F41 MC box for $150 delivered vs the $400 AGR box. Thoughts?
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    195 degree temperature switch

    Anyone know of factory temp switch that I can use to kick my electric fans on/off at 195? I don't need anything fancy or high price. The one I know of from mid 80's F-Body kicks on at 207 and thats too hot for me being in deep south Texas. For the curious I am running a factory style dual e-fan...
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    Fuel Pump Assembly O-Ring Replacement

    Anyone know if it's possible to buy a new o-ring for the fuel pump assembly? When I pulled my assembly the other day I noticed the o-ring was missing. My assembly is working fine (now) and I don't want to buy a new assembly only for the o-ring. Thx!
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    Fuel Sender/Gas Gauge Issues

    Hello all. I have a 98 Z71 that is having issues with the fuel sender. I've had the truck for a year and the gas gauge has been stuck on empty. I pulled the cluster and checked the gauge. It is fine. Today I pulled the bed and started checking things. I noticed someone had already replaced the...

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