r/GMT400

▲ 2 r/GMT400

My 1992 Chevy C1500 is blowing air from the defroster and the floor vents but not the dash vents. How do I fix that?

I just got the motor freshly rebuilt and it sat for over a year. When I got it back the AC controls weren’t working so they didn’t recharge it. I got it and fixed the AC controls so I charged it myself and it only blowing from the floor and defrost vents.

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u/Loljy — 4 hours ago
▲ 11 r/GMT400

Wondering what my truck is worth

I am selling my 1995 K1500 and was wondering what people on here think it’s worth. I live in Michigan and I listed it for $6000 for it but I’m willing to go down in price. I want to sell it quickly but I don’t want to give it away either, since I have $5,000 invested in it not including the cost of the truck itself. Below is the description for the ad:

-245k miles on body

-Healthy tbi 350 with 200k miles, new rear main seal, oil pan gasket and intake gasket. New radiator, plugs / wires. Has had a new cam / valvetrain put in recently. Short tube headers with dual exhaust.

-Freshly rebuilt NV3500 5 speed manual transmission, new clutch and throwout bearing.

-Recently rebuilt rear end with Detroit truetrac locker, 4.10 gears front and rear.

-6 inch lift on 35in mud terrains.

-Body has little rust for being a midwestern truck, needs bodywork and paint.

-Interior is nice but has a cracked dash. 5% tint on side and back glass. Has a trailer controller and an aftermarket radio.

-Only issue with the truck is 4x4 currently doesn't engage, the linkage isn't hooked up and I haven't really looked into it.

u/Northern_Advice — 5 hours ago
▲ 0 r/GMT400

Still misfiring

I attached a print out of my scan tool. It’s a new 5.7 vortec. Less than 5k miles on it. I noticed a misfire on 7 followed by by misfire on 2. I swapped plugs and wires with neighboring cylinder and it remained on 7. So I looked at the cmp timing and it was at 9 degrees so I figured that was it. I fixed it but still misfiring. So I replaced the cap and rotor with the brass vented blue one. Still the same thing. I did an injector balance test. Each injector primed to 60 psi and dropped down to 22psi and 1 or 2 of the injectors dropped to 24 which I’m pretty sure it’s still in spec. I did a leak down test for the fuel lines and it went from 59 psi to 58 ish psi in 10 mins. So no leaks. I haven’t done a compression test yet and I’m wondering if that’s bad or the rocker is bad on 7. Map and maf are fine. I haven’t sprayed the spark wires with soapy water yet to see if it’s arcing yet.

***Unfortunately I have no money as I just came out of a coma (not even joking ) a couple months ago so even being 24 I’m still recovering slowly and it’s like 103F outside so I’m just pretty frustrated. Typical gmt400 shit so I’m hoping some here can help me. I have a decent scan tool if anyone wants to know more data lmk I’ll send more

u/Marrkk18 — 5 hours ago
▲ 11 r/GMT400

Alternator Upgrade, Options/Opinions?

Hi all, just looking for options are an upgraded, higher output alternator. Ive seen some people upgrading to a AD244 unit. Mines either a 105, or a 124, with the 96.5 belt. I noticed my gauge twitching, and my lights ever-so flickering while under load. Battery reads fine, but alternator drops to about 12.7 while driving, every-now and then. Battery is less than a year old, grounds are new, and the headlight dimmer switch is new. Was wondering, is anyone running this exact alternator in there 5.0/5.7 vortec?

u/United-Difficulty-12 — 16 hours ago
▲ 92 r/GMT400

My wife inherited this 1997 3/4 ton earlier this year.

We brought it home last month. Replaced brakes, oil, shocks, tires and detailed the interior. Truck is in amazing shape at 150k miles.

u/kenny2525 — 21 hours ago
▲ 160 r/GMT400

“Grandma’s Green Truck”

2 year update. Nephew and I, more like him wanted to paint some thing since he had started auto body collision school. That and the black single stage paint that she paid for $300 was peeling off.

Jet black paint, mid coat binder and Premium High Solids Clear Coat from SPEEDOKOTE all with are holding up to this South Texas weather. Atlas Super shift Pearls from DIDSPADE color goes from green, blue and purple the website hase a 360 on the color. High build primer from Oreillys paint section. 50 gallon compressor from Harbor Freight and Amazon paint guns don’t know which ones some like ar5000

Color idea came from “Donk Outrageous Paint Job”
YouTube channel that made me pulled the trigger on the color was Spraywaycustoms with his Dirty Sprite paint job. Dipyourcar, gt performance, truegritcustom, Whitley auto works, have great pearls paint jobs if yall like to visit for ideas.

u/DatJayAr — 1 day ago
▲ 91 r/GMT400

Marketplace find update

As a few of you may recall, about 4-5 days ago I made a post about a truck I found on marketplace. Anyways, I made the drive out there today, paid $2,800 for it, and attempted the drive home. The first 10-20 miles was miserable, (it slightly overheated and was backfiring anytime I tried to give it throttle) but after that it went smooth. It ran almost like new going over the cascade mountains. Im happy to report it made the 300 miles home without needing to be towed or trailered! It definitely needs some work but it will get taken care of eventually.

u/Bored_box_2081 — 23 hours ago
▲ 40 r/GMT400

How is this deal

If there’s a better subreddit to ask these questions you can delete

1989 K1500

350 tbi nv3500

$5k

I’m going to check it out this week but just wondering what you guys think is a good deal is

Thank you

u/Same_Leather_9341 — 24 hours ago
▲ 10 r/GMT400

Fuel injector, install fail

How do I safely removed the plastic piece without removing the lower intake manifold? This is a 4.3 engine but I’m aware this is the same style of injector for larger engines

u/01Cloud01 — 1 day ago
▲ 9 r/GMT400

This a normal 0-50 for a stock motor truck?

Truck is lifted on 33’s with a 4l60, looking to either ls swap this truck or try and build this 350 just torn on what to do.

Gonna be putting straight axles and 40’s under it here in the next few months so I need some more power for the hills in my area.

u/Ok_Accountant3067 — 1 day ago
▲ 16 r/GMT400

Gremlins but today it's the AC

Just bought this suburban and its got some gremlins but right now with this heat, i Need some help with an AC issue.

Replaced the compressor on my 99 burb. AC was blowing cold front and rear, went for about an hour drive and stopped for lunch. Came out from lunch and rear is only blowing warm. If I switch the rear to heat, it gets hot and when I move it back it goes back to warm. Lines going to the rear AC arent cold. I checked pressure with the gauges and no sign of a leak. Im a bit stumped.

u/Glittering-Unit3995 — 1 day ago
▲ 3 r/GMT400

How do I find a g80?

I’ve looked on Facebook marketplace and called multiple junkyards and I can’t find a GT4/G80 differential I live in the Dallas metroplex area and I just need something soon

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u/Financialguyjay — 1 day ago
▲ 192 r/GMT400+1 crossposts

Got lucky at the junkyard today

I had another truck with the storage box a few years ago and wanted another for this one. Didn’t realize they were kind of hard to find until recently when I started looking

u/Sweet_Employer_7477 — 2 days ago
▲ 18 r/GMT400

Thoughts?

The key is turned on half way and all I do is add power from the battery and the starter won't turn over but this one injectors fires please help out

u/Hungry_County4938 — 2 days ago
▲ 13 r/GMT400

What is most common to cause AC to short cycle? Worked fine yesterday

Started her up today and the ac is short cycling, I put my guage and it’s the same exact Freon level it was 2 months ago when I checked it. Ignore the green no she’s not leaking.

u/Prestigious-Pass2942 — 2 days ago
▲ 5 r/GMT400+2 crossposts

1997 K1500 TCCM where!?

Does anyone know where to locate the 4x4 TCCM for a 1997 K1500? My mechanic kind of just stopped working on the truck after ripping everything out (see photos). Is the TCCM accessible from what is shown here? My understanding is it would be like 4”x6” box so I don’t know how we are missing it. Push button 4x4.

u/East_Amphibian488 — 1 day ago
▲ 28 r/GMT400

Seat replacement or reupholster?

should I spend the time looking for a new one from a junkyard or online? Should I just spend the money to reupholster it?

u/Sensei_Grape — 2 days ago
▲ 6 r/GMT400

Fuel gauge

Does anyone else have an issue with fuel gauge working from full to just under 3/4 then just befor half a tank it starts bouncing all over the place and jittering? Could it be the cluster? Also the blue highbeam light stays on when headlights are off and goes away when they are on, so bad wiring maybe?

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u/StarDustEther_bro — 2 days ago
▲ 118 r/GMT400

Here's my 89 5.3 5 speed. Its been my daily for the last year or so

Its been lowered and c notched, but im thinking about lowering a touch more and changing the wheels.

u/BlockShot345 — 2 days ago