305

  1. 89Sierra305

    305 TBI Header (?)s

    I have an 1989 GMC Sierra 2WD with the 305 TBI (not Vortec). It's a SCLB. I bought the truck from some guy who was going to strip it for parts for another truck but he ran into some interchangeability issues and changed his mind before he even got into it. Anyway the engine threw a rod on me...
  2. H

    5.0 manual trans swap bin file

    Since the trans in my stock 1995 c1500 with a 5.0 (305) died on me this morning, I have decided it is time to finally put in a manual. for this, I've decided to just go with a nv3500, (the truck is completely stock and makes very little power so I'm not too worried about strength). I can't find...
  3. A

    98 c1500 4l60e not working after 2 rebuilds

    I have a 1998 Chevy Silverado c1500 with the 305 engine and a 4l60e. About 2 my check engine came on saying “transmission component slipping.” I decided to take it to my mechanic and he told me I needed a rebuild after the rebuild the transmission worked okay except that when I would floor it...
    • Alchip
    • Thread
    • 1998 305 4l60e transfer case rebuild transmission problem
    • Replies: 15
    • Forum: Transmissions
  4. mint88

    Mystery Wires 5.7 350

    I own a 1988 C1500 that originally had a 305, but I swapped it to the 350 and have a couple mystery wires. Any guesses? More pictures will be in the comments. Having a hard time uploading other pictures, so here is a link. Thanks!
  5. McSweeney

    Possible vacuum leak not sure need help

    So i have a 97 305 vortec that I replaced spider injectors on and i never bothered to check the intake manifold pressure prior to install. So after i checked it with one of those fixd scanners and map is reading 4psi at idle which from my experience is way too low. Replaced map and nothing...
  6. J

    93 GMC K1500 Code 45

    Hi everyone, I have a 1993 GMC K1500 I bought with 160k miles a little while back, and it has an issue I have been totally unable to fix. My mechanical knowledge is pretty limited, but I figured this would be a good car to learn on. When I first bought it, it would randomly stall at idle every...
  7. Oldschool88

    1988 305 - 1995 350

    I'm new here and I have a question. I have a 1988 GMC C1500 that had a 305. I recently swapped it for a 350 out of a 1995 Chevy K1500. This is my first swap so what do I need for a wiring harness? Will the harness match up with the truck as well? And is there anything else I need to do to get it...
  8. C

    305 rebuild with performance parts

    Hi, I posted another thread about engine swaps awhile ago but still haven't ruled out keeping the 305 thats currently in my truck, so I don't need people telling me to rip it out and get rid of it. so please bite your tongue if you're gonna say something bad about the 305. Anyway, Ive never done...
  9. C

    Would like advice/info on engine swap

    Hi, I currently have a 92 c1500 with a 305 TBI, 700r4 combination. The 305 is feeling pretty weak and i've been researching new engines. I thought about rebuilding the 305 but id rather drive the truck up until a new engine is ready and it just doesn't seem worth it in the long run and resale...
  10. Kyle H

    Engine knock (newbie)

    I have a new (to me) 1998 gmc K1500 stepside with a 5.0l 305 Vortec. And I have an engine knock I have a small inclination about what it might be. Main or rod bearing. Push rod. Or idk but any help or possible other options that I dont know, are very much appreciated. Engine knock is light tap...
  11. Jgoodyear4

    305 Vortec to 335 stroker

    Has anyone here stroked a 305 (Vortec specifically), and what were the horsepower results? I have done the research and I understand I could swap into a 350 to make more power, and I am also considering that. However, I would be interested in doing a stroker on my 305 Vortec depending on the...
  12. Jgoodyear4

    97 305 vortec needs a little more power

    I have a low mileage 97 305 Vortec. It is a low mileage original engine and I intend to keep it in the truck however, it could use a little more power. I have read the argument about swapping to a 350 or an LS a million times and that is not what I am trying to do, I don’t necessarily want a...

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