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  1. 84GMCSierra

    Radiator mounting

    Good Morning members. I have an 84 Sierra, base model with a 350. I put in a new stock radiator last year, but the upper mounts for it are homemade. I have these brackets which look correct for my truck, but online images show different types of mounting. Can someone let me know if the pads...
  2. 84GMCSierra

    Emissions question

    I have an 84 Sierra C2500, base model, and it came from California but didn't have the emissions stuff on it. I'm living in Northern Arizona right now, but thinking of moving to Tucson. If the truck didn't come with the emissions stuff, I shouldn't have to add it if they have requirements for it...
  3. 84GMCSierra

    Axle ratio help

    Hello everybody. I'm trying to figure out what the gear ratio is on my 84 base model 3/4 ton Sierra is. The SPID says GQ1 Rear Axle - Standard. I tried finding it online and the GQ1 isn't listed. Can someone help me out with this please? Engine is a 350, and the trans is a TH400. I'm hoping they...
  4. 84GMCSierra

    Bed rail "cap" width

    I'm trying to get the width of the "cap on a long bed square. The part where the stake pockets are. I can't measure mine as it's in the shop. I'm working on 2 racks that will go under my topper to hold a canoe etc. I have access to tons of scrap steel tubing etc, so want to build something like...
  5. 84GMCSierra

    3+3 for sale

    Not mine but have seen this on FB Marketplace in Sedona, Az. Doesn't look too bad. Moderator: If this isn't allowed, can you let me know where to put it? Thanks and Happy New Year There's a rough 73 C10 in Old Town Cottonwood Az that I'll try to get pics of and post that's for sale.
  6. 84GMCSierra

    Chevy for GMC Hubcaps

    I have 2 different 3/4 ton Chevy hubcaps that I want to trade for GMC caps. These are in good shape. I have an 84 Sierra so would need the 6 stripe ones
  7. 84GMCSierra

    Frame dimensions

    Good Morning everyone. Would the frame on a 90 C30 be the same as my 84 C2500? I have a chance to get a receiver hitch cheap but want to make sure the frames are the same. Standard long bed on both
  8. 84GMCSierra

    Crossfire cap

    Good Morning everyone. Hope you're having a good weekend, and if you're on the east coast and are in the hard hit areas, hope you're all ok. I have a question about those crossfire distributor caps. I saw them on the Performance Distributor website, and was wondering if anyone uses those on your...
  9. 84GMCSierra

    Flywheel tooth count

    Is there a way to find out the tooth count on an original flywheel for an 84 Sierra 2500, with a 250 and TH400? I could get under the truck, Mark one tooth and rotate the engine counting the teeth but I'm looking for an easier way if there is one. Engine has been changed in the past and I'm...
  10. 84GMCSierra

    Wire size

    What gauge is the wire going to the starter solenoid? 84 Sierra 350/TH400. I need to fix mine so want to get the right stuff. Thanks
  11. 84GMCSierra

    Question about parts in catalogs.

    Question for everyone. I different catalogs, why is it that some parts cost more for one side as opposed to the other? Example is left side costs more than the right, yet they are pretty much identical. Another question is wiring. I was looking at a taillight harness for my 84 C2500, and the...
  12. 84GMCSierra

    Brake light keeps going out

    Good Morning everyone. Got a question about my right brake light, on my 84 C2500. I've replaced the socket/pigtail twice now, and the brake light keeps going out, then will start working again. When it works, it goes for quite awhile then all of a sudden it quits working. Taillight on the right...
  13. 84GMCSierra

    Back window sunshade

    Just thought I'd post this for anyone interested. I came up with another use for a sunshade. I screwed 3 binder clips to the inside of the cab, and clip my windshield sunshade into them to keep the sun out. Works pretty good. I tuck the shade behind the seat.
  14. 84GMCSierra

    Something Different

    Thought I’d break away from the norm with my gauge bezel. I had some Krylon Fusion matte blue left from other projects so sprayed my bezel then outlined the gauge openings. Came out pretty good. Will try to get it out in tomorrow to see how it looks. Now I want to do my steering column the same...
  15. 84GMCSierra

    Turn signal lever

    I have a base 84 Sierra and looking for a replacement turn signal lever with the chrome finish. Everything I see online is for trucks with wiper delay(mine doesn’t have delay). I have a Dorman lever but didn’t realize it’s for trucks with delay until today. I’m not real concerned but the marks...
  16. 84GMCSierra

    Cig lighter phone holder issue

    Is there a deeper or better power port/cigarette lighter for our trucks to use a phone holder in? I have an original one socket in my 84 Sierra but the phone holder I have isn't tight in it, like it doesn't go in far enough, and I'm seeing small sparks when I try to plug it in. It has a usb...
  17. 84GMCSierra

    No Defrost

    Good Afternoon members. I have a question concerning my defrost not working on my 84 C2500. I'm wanting to know if this little "pot" could be the culprit? The defrost worked for a couple years then went screwy and quit working, but the regular heat works just fine. The "Defroster Actuator" is...
  18. 84GMCSierra

    tighter steering

    I have a 3/4 ton 84 Sierra and was wondering if there is a way to get tighter turning on it? I know these long beds don't turn on a dime, but I'd like to be able to get into straight in parking spots easier than a 3 point turn. Is there a way of doing this?
  19. 84GMCSierra

    Front end dress up.

    Got me some new park light housings and a set of bumper guards for my plain jane Sierra. Guards dressed it up a little. Will add some wheel arch moldings eventually just to break up the white.
  20. 84GMCSierra

    Horn wiring

    I have a question for you all. I bought an air horn off Amazon, and it only haas 2 wires: Black and Red. Black obviously goes to a ground, but can I connect the red to the factory green horn wire to use the factory horn button?
  21. 84GMCSierra

    350 Valve Cover Oil Fill Tube

    Anyone here have one of these fill tubes you're getting rid of preferrably a factory one? I can buy a chrome one from Autozone but I don't want chrome. Want one I can paint to match my engine. Thanks
  22. 84GMCSierra

    Cowl Screen

    Good Afternoon everyone. I have a question about the cowl screen. I just pulled mine out and couldn't believe the amount of pine needles under it. I thought hese were supposed to stop a good portion of debris from getting in? I do have one small square hole, but was wondering if I could put some...
  23. 84GMCSierra

    Horn recommendation

    What do you all recommend for a loud horn? I had one stock horn on my 84 Sierra when I bought it, and found one for the right side at U Pick It in Prescott, but they aren't very loud. Is there a good under hood mounted air horn fairly reasonably priced that will get attention?
  24. 84GMCSierra

    New brake lines

    Has anyone here had issues with Inline Tube parts? I've used them for years and they seem perfect. I posted on a FB group and was told to check the flares as they can be bad etc. I replaced the steel rear axle lines a month or so ago, and they are fine and going to do fronts today. A question I...
  25. 84GMCSierra

    Defroster not working

    I'm having a problem with my defrosters. When I put the blower on, the air is only coming out of the larger door in the ductwork near the floor(1st pic).I cant tell if there is anything missing from the vacuum connection on the back of the control panel so maybe someone here can see anything...

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