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    ‘99 K2500 died and won’t restart

    This actually happened way back in September but I had a family emergency and haven’t had time to work on the truck til now. So, I was driving my ‘99 K2500, literally the first time after the new exhaust, ign coil, cap, and rotor installed, and it was running fine. About 2 miles from home, the...
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    4wd push button wonky? Or t-case?

    New problem in my ‘96 K1500. Went to shift it into 4lo, no lights on the push-button actuator were lit. No biggie, right? Well, I put it in neutral and pressed 4lo, and I hear the case shift, then immediately shift back. Both 4hi and 4lo lights are now blinking, then after 3 seconds they stay...
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    ‘99 on the road finally, now rattles in first

    I’ve finally had time to get my 2500 back together and on the road, and I’m hearing a weird rattle noise I need help diagnosing. I don’t think the truck rattled when I brought it home a few months ago, but it ran so poorly on the drive home I may not have noticed. It only happens in reverse...
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    Replaced key tumbler on my ‘97, now won’t run

    In addition to the miss I’m trying to diagnose on my ‘97 K2509, I’ve now run into another issue, The old ignition tumbler would no longer turn. No biggie, followed the steps to replace the ignition tumbler, and the new one turned like it’s supposed to. Problem is, it won’t start the truck...
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    New-to-me ‘97 misses but throw no codes

    Been a while since I’ve posted on this forum! My ‘96 K1500 is still running great as my daily, and I just picked up a ‘97 K2500 from a buddy to be my new tow pig. The ‘97 is a 350 4l80e with 123k miles, and sat for about 2 years before I got it. I got it running in his driveway (poorly) but it...
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    ANOTHER "my '96 GMC idles high" thread

    Man, I'm getting fed up with this truck. After chasing high idles issues for two years now...the high idle is back (it does periodically go away)!!! Or I guess I should say, never really left! @&$#! Here's the symptoms: After warm-up, the truck will idle at 900 in P, 750 in D. Not terrible...
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    '96 randomly runs like crap, then fine

    after a month on my new timing chain, cap, rotor, plugs and wires, my truck runs great! Right up until it doesn't. Symptoms: -miss at idle -way down on power -missing, backfiring, and overall crap running at part throttle When this happens, I get 5 codes pop up according to the shop: -faulty...
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    Unusual GMT400 builds?

    back when I had my old '69 C10, I remember finding a lot of pictures of purpose-built 67-72s that were very unique in their construction. I guess most were sold a cab/chassis trucks, and then after delivery they were built to be cable layers, welding generators, convertible cattle haulers, etc...
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    O2 sensor spacer?

    i asked over at 67-72 , but wanted to ask here too. Can I run a catless exhaust and put a spacer on the rearmost o2 sensors to avoid CEL? My '96 is emissions exempt because I have farm tags so I was toying around with this option.
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    Random Miss at 65-70

    My GMC is running great, and has been for a while. Over last winter I put in new plugs, wires, cap, rotor, TPS sensor, water pump, and did some odds and ends on the interior. Been using it this way all year, having driven about 10000 trouble free miles. Then, two days ago, I am noticing it's...
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    W/T Picture Thread?

    Any other fans of the base model W/Ts offered in this body style? I honestly prefer the aesthetic of the sealed beam grilles of this package to the fancier ones. Here's my former (precursor to the w/t) '88 C1500. This was as base as it got: no Ac, no overdrive (reason I didn't like it), no...
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    Hi from Central MD!

    Hi, I'm Adam! I'm a dairy farmer here in Maryland and my truck of choice is a '96 GMC 1500 Z71. Just picked the big boy up about 6 months ago and have put almost 10000 miles on it since then! After replacing the TPS, the GMC runs like a top and is comfy enough my wife and infant daughter can...

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