1988-98 Chevy & GMC OBS Trucks | What To Know BEFORE Buying an OBS Truck 

same......

Same lol

Got mine yesterday 😁

Same

I have a 89 3500 single axle I just bought it's a step back but a step up from my 70 C10 1500

Hey, I was just given a 90 k2500 (6 lug) it's a ext cab short bed 350 auto. The transmission needs rebuild, not leaving first gear, and the interior is wrecked from both doors sagging and not sealing, especially the passenger side, I could basically see through. I need some advice on what to do, where do you find your parts? It'll be my first transmission job. 315k miles

An old geser in his 30s

Update: Had a shop stick a new crate tranny in her. She's back to being my DD now. Also picked up a C3500 dually haha.

Teach me my paint is peeling 😔

I've been looking at an 89 chevy stepside, it has a 305 would you say it's a reliable vehicle? Looking to get my first trucj

@@paralegalparaplegic8177 Your best bet is to just trial and error, watch tutorials and do a small corner. Just tweak it. Hardest part is keeping the dust off the fresh paint.

I’ve owned one for two years. They’re dude magnets lol

@@thebsmithimages6544 I’m sorry you’ve had that experience 🤣 I hope you mean like in a friendly hey cool truck attention lol.

This is true. My gf sister wouldn't fck me till I had a truck capable of driving into the woods where nobody could catch us.

no doubt

@@irishuwould5185 that’s exactly what I mean lol. I’ve only had maybe 3-4 girls comment on it. Other than that, all dudes lol

Thanks for the info!

How do I know if my fuel injectors are going bad or fuel pump can’t tell can you help ??(96 c1500)

@@chrisvilla485 what's your fuel pressure? Here was my issues. My fuel psi was running in the hi 30's.knowing it was low and I needed to be above 55psi. I had already did a complete tune up including through TB cleaning and fuel filter change. Knowing that I could not dead head my fuel pump easily since the spider injectors and regulator was under the upper intake. I had no information when the pump had been changed or if the spider injectors were upgraded and it had 179k. I decided to roll the dice and replace the fuel pump first with a Delphi and then I knew in the back of my mind I may have to replace the injectors if that did not solve my problem. After fuel pump was replaced my pressures were 58 psi key on engine off, 61 at idol and 65 when I snapped the throttle using a cheap old harbor freight gauge. It solved my problem. Truck ran great. I knew the history of these trucks know fuel pumps were the most common failure and I was right. Sorry for the long explanation now to attempt to answer your question from my perspective is I don't know with diy tools. If it's running rich and your plugs are black or flooded or some off them are then that might tell you something like leaky injectors and if your running lean that could tell you low fuel delivery such as fuel filter, leaking pressure regulator or weak fuel pump. That could include a vacuum issue also will cause a lean condition and your pressure regulator is operated by vacuum. So to definitely tell you fuel pressure regulator or fuel pump is higher than my pay grade using simple home garage tools. I just narrow it down by the most common problem by what's the percentage rate such as the most likely is 80% of the time it's the pump. I am from Las Vegas and I am not well rehearsed in using a pico scope. If your really unsure you have to have a good mechanic not shade tree type to use professional diagnostic tools. If you have low fuel pressure and you have changed your filter I would first change your pump with a good pump not a cheap one. If you psi leaks down fast or loses prime after key off and your plugs are not flooded I would guess pump. Sorry I can't help anymore I am not a professional mechanic. Side note I plan on replacing my injectors for the following reasons. First I do not know if they have been replaced and I plan on keeping it a long time plus at the same time I know the lower intake gaskets are prone to leaking so I want to upgrade the gaskets to the ones that have metal in them instead of the just plastic OEM style. Then I know everything has been done and upgraded and it's the only thing left in my situation for a peace of mind. I am in the long haul. Sorry I cant help more.

@@Z71Garage thanks brother for all of your info now I can narrow it down to the fuel pump because I recently did a full tune up and it ran good for a week then it just started sputtering as if there was no gas in the truck . But thanks again man really big help !

Injectors can be tested via fuel pressure drop test easily with a proper scan tool. Each injector should drop equal pressure when activated sequentially.

Same !!😊

I got 91 c1500 Cheyenne 5 speed manual transmission, live it.

Sorry for your loss but it sounds like your step fathers legacy will live on through his/your 88 Cheyenne every time you drive it

I appreciate the kind words Michael, thank you for watching!

sell me that truck!

Glad it was helpful!

Well said!

Thanks for the sub!

Great info James! Thank you for the quality comments. Hopefully it will benefit another OBS owner when working on their truck!

Glad it was helpful!

Until it leaks which they all do. Not cheap to replace. Vacuum booster usually never goes bad.

Thank you

Cool, thanks!

What year ?

@@theevilempire6935 Mines a 90, Codington Red, dropped 6-9, trans planted a 502HO, 700R4 built ETC

Vans are awesome and are already seeing an uptick in popularity... maybe the next "new" trend? Keep an eye out for the video, we are on it!

I've a 92 excab c1500 Silverado. The Interior is done. It's cracked all to hell and ripped while the door panels are held on by zip ties. Lol. The 350 was rebuilt 30k ago and trans 10k according to the previous owner ...It's a 8ft bed with tow package. A fn Boat. Hahah. But no smoke and fires right up. Will through the tires which are now too old to smoke right off. Hahah. I have it sitting now out back. Went and cranked it last week. It does need cooling flush from sitting 3 years prior. Cleaned up the moss and debris and put new battery. I plan on one day paining it or dropping the drive train into a better looking body. Lol. I may also then eventually rebuild if needed and get her to about 400 HP or 375hp. Nothing too crazy. Just like to know I can baby her and keep it a sleeper. I wish I had headers on it and maybe upgrade as is too many choices. Lol. I agree with the comment. I have no idea what it was bored to. There is no stroke evidence as the previous owner said. The harmonic balancer looks stock. Only reason I know it's rebuilt is it doesn't smoke. It's readibg 198k

Nice, I have a 93 Cheyenne long bed, 4.3 v6 (thank God) single cab automatic. I was wondering why my truck has square lights instead of Chinese eyes. MFD (Oct. 1992)

@@dr.auggie1109 lol Chinese eyes. The single headlamps were base & were available on all trim levels except the Silverados which the Chinese eyes came standard on but optional on the other trim levels.

@@kevinrichards3288 thanks, makes sense. I'm from Texas and that's what we call em ha but I thought it had something to do with the reason my 4.3 v6 came with a oil cooler

@@dr.auggie1109 my favorite ones are the square bodies which were the last Chev & GMC fullsize pickups & SUVs right before the OBSs. They were built from 73 - 91, except the reg cab pickups "half tons & three quarter tons only" were done in 1987 & same with the one ton reg cab pickups in 1989.

@@kevinrichards3288 my tbi is throwing major codes so I'm going to do a natural asp carb swap. It's a v6 4.3 262ci I was curious about the cfm carb size ? What do u recommend from your experience. 670? 880? 720? I'ma 21 century mobile mechanic so I'm not familiar with thos

It's 88 to 95 because they are tbi while 96 to 98 are fuel injection

@@Batman-ro7mh I love my 94 Silverado 5.7

@@irishuwould5185 I’m literally going to go buy one tomorrow it’s a nearly perfect step side example for 6500$

@@omarbueno9834 that’s exactly what I paid, mines a step side also extended cab

it’s also because people are now starting to appreciate the square dash

Nice!!!;

Ya this is one thing I haven't saw mentioned much in the comments either. You want the manual transmission if you can find one b/c the auto's never lasted if you worked them much at all.

I believe there a better trans then the 93-94 4l60e. To make a 700r4 happy comes to govner spring and do the vett servo mod and do some research on a good lockup converter. I got one a lifted 92 k2500 on 35s . Gearing it for the proper gear size helps and a external trans cooler .

Lol ok. I have a 700-r4 in my 1991 Camaro. 33 years and still shifting great.

Yeah...nope. They would burn out in less than a year if you towed in overdrive, and/or over capacity. If you actually took care of the 700r4, you'd have one like mine, over 250k and still shifting strong.

What website?

@@Ace-44 tbh i forgot it was a while ago ill check my saved websites later see if i remeber

4l80e...

Have you tried LMC?

Yes but no luck

@@roycervantes43 Tried Rock Auto?

TAKE IT. Life advice-it’s free always take the car!! The brakes, calipers and drums aren’t an issue as those would’ve have to been replaced at some point anyway. I would keep an eye on the brake and fuel lines if it’s sat for a while, but Like you said most major things are working and fine, so just slowly replace the parts over time and in a year or two you’ll have a second car that everyone will want!

@@redditman1122 Yes, I decided to go for it and give it the love it needs. :) And, off course it will love me back ;) I had a 78 Suburban with a 454 and a 85 K5 - I do love the squares.

no

The stepside was only available for the half ton trucks which the diesels were for the 3/4 and 1 ton trucks.

Good to know cause I say a blue set diesel for sale thing was complete shit box 📦 now it makes perfect sense.

GREAT

Mr. Wobble Waffle, if you can't sleep, go out into the garage, grab a wrench, take something apart and put it back together. What can I say.. it works for me

I see what you did there 😂

@@FirstPlaceAutoParts I think I'll take your advice from the video time stamp instead.

@@Blobby_Hill 😂😂😂

Right? Somehow the previous generation trucks got the "square body" moniker. Could definitely have applied to the OBS trucks as well