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    P0342 DTC - Random and Intermittent - L31, cammed, 0411, 24x ignition, BB tune

    This is on '98 K2500, which now has a cam, 0411pcm, and 24x ignition, as well as 24x tune. Since making these mods, I keep getting 2 codes intermittently - P0706 and P0342. During the 0411 swap, I did install the 4 wires that tie into the transmission range switch (I spliced behind the gauge...
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    Recommendations on rear axle rebuilder in Houston

    I'm finishing up my '96 stepside build, and am in process of installing disc brakes in rear from AZProPerformance. When I opened up the diff cover, dark brown gear oil came out, looked horrible. The magnet on the diff cover had some decent size metal chunks, and the spiders are definately...
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    Throttle Body shaft seal replacement

    I have a '98 K2500 with L31 vortec engine. I recently performed a cam swap, and have been chasing a few vacuum leaks. I performed a smoke test on the engine, and found smoke coming out at the throttle body shaft spring area. I removed the TB from the engine, and proceeded remove the throttle...
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    Please Help - Getting Codes after Cam Swap

    '98 K2500 w/L31 & 4L80e. I just completed a cam swap, along with 24x ignition, and 0411 swap. I went with Comp Cams 08-501-8 for the cam. I upgraded the valve train with springs, offset retainers, etc as well. Blackbear provided the 24x tune for 0411. I have it all buttoned back up, and the...
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    Anyone using GM Performance 88958652 lifter trays on L31 ??

    Was wondering if anyone is using these LS style lifter trays, which appear to be designed for the SBC. Sure seems like a cheap and handy upgrade to do while changing a camshaft out. or replacing the common plastic intake gaskets which fail. From what I read, the claim is 2 spins of the cam and...
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    Is Marine 395 cam the right one for '98 DD K2500 L31

    Hey Guys, Wanted to ask a quick question about the 395 GM cam. Based on all the previous posts I've gone thru, it sure looks like this '395 cam is the one to go with for all around performance/mileage/towing. The other cam I was looking at is Comp Cams 08-409-8. The Comp cam has more...
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    Great Find for Used OBS trucks

    Wasn't sure where to post this up. Since I use this part of the forum the most, figured to put it here. I think I may have found a nice place to source OBS trucks in outstanding condition. These are all Oregon and Washington trucks, and me being from TX, I was surprised to find them all in...
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    Dyno/Tuner Recommendations - Houston TX

    Hello, I've recently upgraded a new crate L31R with camshaft, rockers, valve springs, higher stall TC, and a 24x CPC ignition upgrade, along with an LS 0411 pcm to run the engine. I started the below thread related to the engine upgrades...
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    Distributor installation problem

    I have had a new L31 crate Engine installed for about a year. I just did the 411 PCM swap and got a black bear tune. When checking camshaft offset retard I was at -26°. I was able to get it to -4° before the distributor ran in to the intake. Yesterday I decided to redo The distributor install...
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    0411 swap problem - getting $0281 error code on autocal

    96 chevy SBSC with L31R I just got my flash/tune from Blackbear, and am trying to install thru OBDII port using an Autocal. I keep getting a $0281 error code when trying to load the tune to 0411 ecm. BB says that is a communication error code, and could be issue with OBDII port wiring or...
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    What cam for single cab 2WDshortbed with new L31R

    Hey Guys, I've been watching these forums for a while and finally able to play with my 96 SC stepside. This is now my hotrod truck, and its in great shape: has relatively new 4L60e Goodwrench rebuilt tranny; with stock 3:73, I just put a new L31R crate longblock in with stock intake. I...

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