Jump to content

some electrical probs. 82 GMC sierra

82GMC91CIVIC

Recommended Posts

82GMC91CIVIC Enthusiast

82GMC91CIVIC

Posted
Posted

i just bought a 1982 gmc sierra classic a couple days ago. i paid 900 and this truck's main purpose is to be a beater until i get my civic running again.

 

the truck was originally a diesel but the owner before the previous owner swapped in a gas 350. ive looked it over and from what i can tell its pretty half ass.

 

1. the speedometer doesnt work.

 

there are two cables that go into the cab but not up to the speedometer. i traced both cables back to the transmission and one plugs into it while the other isnt connected at all. i just want to know which speedometer cable i need to use with this swap because the two i have are different.

 

2. i dont know how to switch between the two fuel tanks.

 

there is a switch on the dash that is a green two position one with about 4-5 wires coming out of it. i tried switching it but nothin happened. i just want to make sure this is the switch for the gas tanks and if its not what does it do?

 

3. mystery foot switch to the left of the brake pedal.

 

figured out the foot switch was for the highbeams. never would have guessed myself. thanks

 

 

i still dont know how to switch the diff though

 

i was informed that this truck has a two speed differential but once again the owner didnt know how to use it. i think this switch might do that but im not sure.

 

also related to this there are two fat black cables that arent connected to anything by the diff. and one fat black cable that looks like it should go to the battery.

 

by the way if it helps the engine is a 350 out of an 81 car (i was told) with a 3 speed automatic transmission. the truck is a 82 sierra classic dually 2wd.

 

any help would be greatly appreciated. sorry about the long post. ill have some pictures later if you guys like that stuff. (im from honda-tech.com)

Archived

This topic is now archived and is closed to further replies.

Go to topic listing

  • Recently Browsing   0 members

    • No registered users viewing this page.

  • Forum Statistics

    250.4k
    Total Topics
    2.7m
    Total Posts

  • Member Statistics

    342,840
    Total Members
    8,960
    Most Online
    appletrav
    Newest Member
    appletrav
    Joined

  • Who's Online   4 Members, 0 Anonymous, 404 Guests (See full list)

  • Latest Articles

  • Posts

    • newdude
      2 speed transfer case optional now?

      By newdude · Posted

      This is a 1/2 ton thing ONLY.  All HDs 2020-2026 have the two speed transfer case, with Autotrac as an option.     1/2 tons 2019-2026, regular 4x4s come with a single speed case (no 4LO!), and trucks with Z71 ordered, or all Trail Boss trucks come with the 2 speed case.  2 speed case is also an option on WT, and is also standard on High Country.  
    • newdude
      Different requirements for oil filters?

      By newdude · Posted

      2013 5.3 still to this day calls for the PF48 filter.  Which as a 15psi bypass pressure.     There is a TSB, 17-NA-157 that talks about the PF-63 and PF-64 filters which have a higher bypass rating of 22psi.    TSB HERE - temp.xml   "Beginning in 2012, the oil pumps began to regulate main gallery feedback instead of pump out pressure. This means that the oil pump now does not begin to regulate until pressure is built up to the main gallery. This change reduces the amount of time it takes to provide oil to the engine bearing and lifters during extreme cold start conditions.  Main gallery feedback oil pump control systems are present on the following engine families which use Spin-on oil filters: Small Gas Engine (SGE), Large Gas Engine (LGE), High Feature (HFV6) Gen2 and Small Block Gen5 gasoline engines. These engines with the main gallery feedback oil pump control systems are factory built with an ACDelco® oil filters"   It also calls out what engines use those filters.  The gen 4 small blocks were not on that list (LMG, LC9, L9H, L92, L94, L20, L96).  Gen 5 small blocks use the higher pressure filter.          That all said...   Your 7045 Napa filter is the PF63 equivalent, with 22psi bypass.  You are already using the higher bypass pressure filter.  You CAN keep using it, you don't technically have to use it though.  
    • Grumpy Bear
      Different requirements for oil filters?

      By Grumpy Bear · Posted

      Do you know WHY the filter relief setting was increased to 22 psig?    When the new system goes into the second stage the pump volume ramps up considerably. It was found that the 15 psi filter bypass setting put the filter in bypass on a warm engine when the second stage was activated. Raising the filter bypass setting forced the filter to do what it designed to do. Filter. Preventing debris from circulating during high load, high rpm operation.    So next question is how did GM find this out? VLOM/lifter failures and a deep dive by Melling Corp.    Last question. Is it required? Look at it like this; a motor may be equipped with a rev limiter. But it only works if the set point in reached. That 22 psig setting only matters if the pressure differential across the filter media exceeds 15 psig during normal warm operation. Second stage kicks in around 3000-3500 rpm.    I can't answer your question because I don't know you and how you use the truck. But I think there is enough information here to let you decide for yourself. 😉
    • Coastie05
      give me some tips to make my truck look better

      By Coastie05 · Posted

      Go back to OEM wheels. 
    • newdude
      2020 Trailboss 6.2 replacement

      By newdude · Posted

      Probably not their first rodeo, so it should go as planned most likely.  Typically the service manager or tech doing the swap will put some seat time to shake it down after they get it all put back together.  We usually put 50-100mi before we hand them back so if something happens, its not after you get it.  A coolant leaks, oil leaks, a ground left off or loose, vibration, etc.     The new engines so far have been good?  There's been a couple that have popped out there again (the replacement engine) but most have been okay.  

  • GM-Trucks.com Clubs

  • Popular Contributors

×
×
  • Create New...