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  1. G

    I’ve been offered a 6.5 swapped 88k 2500 for a cheap price, should I buy it?

    Meanwhile im over here with less than 5K total investment in any one of my 6.5Ls and id trust almost all of them to california tomorrrow. Most expensive initial investment has been $2500. 6.5Ls are like 4.3Ls. Buy one with an automatic, and you'll hate it. Dump money into trying to make it...
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    98 454 lean and fuel pressure

    make sure purge solenoid is working and you arent developing alot of vacuum in the fuel tank, that would make the pump work harder.
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    Evap solenoid replacement

    It was a year thing, I think 96-97 had the double solenoids and the old school charcoal canister and either 98 or 99 went to the new style. Im going to be changing mine in the cold as well on my 97, as it seems to work at idle but will develop horrendous vacuum at road speed. actually imploded...
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    Vortec 454 Oil Recommendations

    alot of 454s on irrigation wells run 15w40 diesel oil. In a gas pickup application I like running 10w30
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    NV4500 gear lube change suggestions

    also has to be a full synthetic fairly heavy oil to tolerate the gear and bearing load. Synchromesh is good enough for the synchros, but the bearing and gear load is the other half of the needs of the NV4500, so the 12346190 (or redline or amsoil equivalent) is about the only one that can meet both.
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    Arteb Headlights / Taillights End-of-Life (?)

    reading more, are the Arteb headlight mounts included with purchase? I see there was fitment issues with the stock brackets.
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    Arteb Headlights / Taillights End-of-Life (?)

    So i must live under a rock, I just found out about these, and I am interested! (admittedly I dont frequent gmt400.com much, lol) So these are plug and play, no adapting necessary for stock harness and light sockets, correct? I dont like hacking up harnesses if I dont have to, but would love...
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    GCWR -Suburban

    DOT doesnt pay attention to "tow ratings" (aka GCWR) because acceleration is a factor in their ratings, Identical chassis, brake system, and axle ratio will have different ratings because a certain engine option will accelerate faster. you cant tell me a 454 is somehow safer with 2K Lbs more...
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    Floor shifter boot

    88-91 sm465 boot 88-94 mg5/92-94 NV4500 boot or 95+ boot? also, where are you finding the screws?
  10. G

    Wiring harness swap from 6.5 to 5.7

    is the 6.5 wiring for an automatic or manual?
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    Decent affordable recommendations on brake control? For Towing anything from a few snowmobiles / quads to a Small car trailer

    check the website but pretty sure the voyager is at least proportional, Im afraid the sentinel is timer based. Me personally I tow pretty heavy and really like the Tekonsha prodigy P3. i have about 5 of the units scattered across the fleet. it has a removable plug on the back so you can share...
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    What and how many miles a year do you tow with your Gmt400?

    All the time with my old girls, the 95 K2500 odometer was at 471,*** to finish this year, did 4 trips to California, plus a handful of regional hauls. Ill have to go back in the fuel log to see what odometer was at the beginning of the year, I know its gotta be at least 10K miles. All of them...
  13. G

    Best manual transmission for 350 small block

    Where did you find that if you dont mind me asking? 2 or 4wd? Thanks!
  14. G

    What year was the nv3500 stick mostly found in the 95-99 OBS trucks ? 96-97? 4.3 or 5.7 trucks

    look for a later one, pretty sure they followed the NV4500's switch to internal slave cylinder in 1996. While harder to change, there is less to go wrong than the 95 and older with a fork and pivot ball. Shift boot and tower changed for the GMT800, so you are preferably looking for a 96-98...
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    3 spd manual to automatic

    id much rather have the 4.3L and SM465 (im assuming thats what you are calling a 3 speed manual) than a 350 and an automatic. The automatic will be way less reliable, 350 is going to suck gas and still be slow, the 4.3L is slow but good on gas. plus the weight distribution is better with the V6...
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    Installing filter on power steering system - which way does the fluid flow at the brake booster?

    Ive always heard to plumb it to the cooler return, as the return from the brake booster needs to have zero restriction or else it might hang the brakes slightly.
  17. G

    Charcoal canister question (7.4)

    Yes, the solenoid on the side of the intake
  18. G

    Best quality fuel tank for these?

    Well, right or wrong I have a Dorman on its way. Blame L31MaxExpress and my buddy who used to run a automotive repair shop (still does,but basically for his own use and close friends and neighbors, cows and crops keep him too busy to bother messing with outside customers. :)) he didnt hesitate...
  19. G

    NV4500 gear lube change suggestions

    Echoing the previous sentiments, I run Amsoil equivalent to the gm 12346190 spec and get along great. We ruined a nv4500 years ago with royal purple. They are definitely picky.
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    Best quality fuel tank for these?

    Hey all, I have a 97 C3500 that is in need of a fuel tank. Im finding that Dorman and Spectra are the main contenders for a new tank. I was curious if anyone on here has ordered a tank recently and can give feedback on the quality? I really wanted GM, but its NLA, and I doubt I can find a...
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    97 7.4L ate a fuel pump, fuel tank under vacuum. related?

    I figured I'd give an update, Farming is done for the year so I have a little time to mess with stuff. Pulled the pump, (through the hole cut by previous owner...hack...) and found a mess! lol The tubes are all bent to crap and the bottom of the tank is sucked in, so apparently a 454 makes...
  22. G

    Charcoal canister question (7.4)

    Im working through a recent purchase of mine, a 97 454,and i thought it had a weak pump, nope,pump is fine, however, I think the purge solenoid was stuck open and it sucked the tank in and bent the pump assembly enough that the pressure hose off the electric pump popped off the feed tube. So...
  23. G

    1998 6.5 2Dr Tahoe

    Make sure its getting up to at least 160 degrees and TCC is locking. The loud engine part makes me wonder if the ECM feed Coolant Temperature sensor (in the thermostat housing) is bad and the ECM thinks its -40 degrees out and has the timing advanced quite a bit. If this sensor is bad, TCC wont...
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    Engine swap for towing

    fix what is wrong with the 6.5L, they aren't a power house, but they are a lot better than yours when everything is working correctly. If it blows black smoke and the glow plugs dont work, check fuses in the underhood box. if ENG-I or ECM-I is blown, unplug your shorted out fuel heater (wire...
  25. G

    3500 tow rig

    I dont like how the LS family pulls a trailer, but then again I dont like how an automatic pulls a trailer either. lol I vote keep the 5.7L, and consider going to a Tremec TR4050 if the 80E ever goes down on you.

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