Recent content by Enginebuilder

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    88-95 EGR System Testing

    Came back to this thread to determine if it had helped anyone. I just printed this out to help a friend diagnose their EGR issue. When I originally wrote this, I had the factory service manual on hand, and was able to look at the wiring diagrams and vacuum diagrams. If anyone has those...
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    Repair or replace G80?

    So, the price of a junkyard rear axle was only $300, came with everything but the drums and shoes. Got it cleaned up, replaced the axle seals and put on a fresh coat of paint. I'll be taking out my old axle, and over the course of the next year or so, will rebuild it with a TrueTrac...
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    Repair or replace G80?

    I was apparently intoxicated when I found a TrueTrac for my truck at $450. They're actually about $750 for the 14 bolt... That takes it squarely out of my price range. Is there a better differential that can be sourced in a junkyard?
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    Repair or replace G80?

    As to how long this one lasted, I have no idea. I would assume that I would have heard or felt the differential go, but I never did, so I'm assuming that it failed prior to my owning the truck. If that is the case, I've driven it like this for almost 20k miles... My understanding (and...
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    Repair or replace G80?

    Winter is here in full force in Alaska, and so I've been working on my truck, taking care of maintenance items that have gone too far. After dropping the cover in my rear differential, I notice that the small gear mechanism for the Eaton G80 has sheared a number of splines. This leaves me in...
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    1992 K1500 4hi won’t engage

    This issue is pretty common, actually. Check your linkage, as suggested above. If that doesn't take care of the issue (it probably won't) then you'll have to replace the synchronizer assembly inside the transfer case. A full rebuild kit doesn't cost much (less than $300) and if you have...
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    Did I break my truck?

    Do you have a multi-meter?
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    Blower motor relay failure?

    I'm really interested in where, exactly, you found the connector that failed, and where this system actually grounds at. I've been having the *exact* same problem with my '95, and diagnosed it as an intermittent ground; I've spliced an auxiliary ground into the ground circuit as an expedient...
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    OBD cable for 1995 GMC 2500?

    Hey folks, just wondering what cable & software ya'll are using to monitor the OBD port. I've got a 1995, that I'd like to scan/log, so any recommendations on which cable and software would be compatible would be greatly appreciated.
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    Rebuild kit for NP241-C?

    Looking for recommendations as to which kit I should get, and from whom. Truck is a 95 K2500 w/ 4L60E. Thanks in advance, -Eric
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    285/75/16's on stock K2500?

    I've got a 1995 GMC Sierra K2500 (heavy half, really, as it's a six-lug) 4x4. Looking to put new tires on it, and a friend recommended the following tires: Goodyear Wrangler Duratrac 285/75/16's I'm using the stock rims, on the stock suspension. Will these fit? Would hate to spend that...
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    1995 transmission and transfer case interchange?

    Hello all. I have a 1995 GMC Sierra SLE with 5.7 TBI, Automatic 4L60E, and an NP241 manually shifted x-fer case. With 200+ miles on the odometer, but an above-average body and frame, I'm rebuilding the drive line a bit at a time *before* things fail. Just finished rebuilding the engine...
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    1995 ECM Pinout

    Hey folks, was wondering if those of you with a 1995 FSM could scan the ECM/PCM connector pinout? I'm trying to chase down an electrical gremlin, and knowing which wires at the ECM go where would be a huge help. FYI: Truck is a 1995 GMC K2500 5.7 w/AT
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    ABS light will blink when I retrieve codes but engine light will not

    Are you sure you are shorting A to B in the ALDL connector? Does the check engine light illuminate when you turn the key to the "on" position, but do not start the truck? If the light doesn't come on, verify that the bulb in your cluster is good. If the bulb is good, the light doesn't...
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    idle problem. Vacuum? MAP sensor? Brake Booster?

    Disconnect the brake booster vacuum hose and plug it with your thumb while the engine is idling. If the idle cleans up, voila- brake booster failed.
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