PDF of Square Schematics & GM Training Manuals

[Andrew S]

Thank you! Works now for me too.

Andrew

[UKNOWME]

Sub'd

[Got Smoke?]

Thank you so much for uploading these manuals! I HATE electrical problems and this will help me fix my brothers truck SO MUCH EASIER!

[Kainedogg]

Thank you so much for doing this. This is a labor of love and much appreciated.

[Richard2112]

Hats off to ya for the manuals. i DL'ed two of them.

Interested if anyone could upload a pdf of ------GMC Truck Unit Overhaul Manual Rear Axle HO52 HO72 H110.....X-4A-06

[hatzie]

Added 1978 Delco Radio Service Manual

[hatzie]

1978 radio manual link was incorrect. Fixed it.

[hatzie]

Add Delphi wiring connector textbook.
Color pictures of how to extract various terminals from many Delphi connectors to repair them. Appendix A has Power-window/lock connectors among others.

Terminology - Major Wiring Harness Components...................................................... 1-1

Connector/Terminal Families (Includes Recommended Removal Tools)..............2-1
Female Metri-Pack 280 Series..................................................................................2-2
Male Metri-Pack 480 Series....................................................................................... 2-3
Female (Pull-to-Seat) Metri-Pack 630 Series......................................................... 2-4
Female (Pull-to-Seat) Metri-Pack 150 Series......................................................... 2-5
Edgeboard ECM................................................................................................. ..........2-6
Female Micro-Pack 100..............................................................................................2-7
Female Pack-Con................................................................................................. ....... 2-8
Pin-Grip................................................................................................ ..........................2-9
Weather-Pack................................................................................................ ..............2-10
Tangless 100-W................................................................................................... ........2-11
Female Metri-Pack Tangless 280 Series................................................................ 2-12
Repair Methods............................................................................................. .......................... 3-1
Workmanship Standards........................................................................................... .3-2
Appendix .................................................................................................... .......................A-1
Wiring Assembly Repairs Video...............................................................................A-1
Other Connectors/Terminals.....................................................................................A-1

[frankyjoet]

hatzie, this is wonderful and will help me with now and future problems. thank you so much. my ride is a newly painted 3 stage paint midnite blue with pearl as 2nd stage. job done by me in my garage with an air compressor. 2 harbor freight hvlp guns. not bad for a novice. 73 gmc 3/4 ton 4 spd saginaw 350 bored out to 4.0 engine redone by a mechanic my neighbor. i did learn to reground the valves new valve stems. Added new piston (concave type) new roller rockers an rv cam crank was serviced. heads not touched. engine has to be broken in. has about 3 miles driven around the block. Added all kinds of after market items edlebrk carb intake man and hders from ebay. thanks again frankyt.

[hatzie]

I may be getting a Fujitsu Fi7180 A3 scanner for Christmas this year. It'll scan 11.68 inch x 18.3 feet vs my Fi5530C2 A3 scanner that only does 11.68 in x 34 in.
If I can swing this I can scan the 38inch fold out wiring manual pages in one shot. No post processing to stitch the pages and hopefully much clearer scans with the improved CCD & LED lamps. This means I may actually scan the P, G, & MD pages from the early wiring manuals.

[hatzie]

1982 CK wiring diagrams posted

[paintinx]

thx a LOT for your work!
It is a very helpful tool!

Best, Stef

[hotrodbear]

I downloaded the 1987 wiring manual to find a diagram of the bulkhead connector. It appears that what was uploaded was a 1988 manual. It said 1988 c/k truck on a title page and the connector I was looking for seemed to be of the later style. Is there a chance that the wrong manual got scanned? Thanks for all the great information though! This stuff is priceless!!!!!

[hatzie]

Originally Posted by hotrodbear

I downloaded the 1987 wiring manual to find a diagram of the bulkhead connector. It appears that what was uploaded was a 1988 manual. It said 1988 c/k truck on a title page and the connector I was looking for seemed to be of the later style. Is there a chance that the wrong manual got scanned? Thanks for all the great information though! This stuff is priceless!!!!!

You're looking for the RV series not CK. The CK squares ended in 1986. In 1987 the squares became RV models and GM began building the new 1988-98 T400 CK models.
The linked manual is a full line GM light truck wiring book that includes CK, G, P, ST, RV, & M series light trucks. There are bookmarks on page 1. Mouse over "RV Truck" and click.

[infinite-foamies]

X8832_1988_GMC_RVGP_Light_Duty_Truck_Service_Manual
1967-1978 GM Dana Axle Bill of Material Numbers. Dana Publication X510-8.pdf
1978-1998.5 GM Dana Axle Bill of Material Numbers. Dana Publication X510-9.pdf
Is invalid

Here are some manuals I have that may be useful:
700R4 ATSG
TH400 ATSG
TH350 ATSG
4L60E ATSG
4L80E ATSG

Haynes Diesel(including 5.7, 6.2, and 6.5)

[hatzie]

Dana moved the parts books.
Go to http://media.spicerparts.com/media
Type X510-8 in the search box.

Both the X510-8 & X510-9 catalogs show up. I would download em and save them offline as Spicer may take them down permanently with zero notice.

The Haynes manuals are inexpensive and easy to come by so I won't be linking in the main post.

The 1988 link changed for some reason. I fixed it.
This is the whole Mediafire Archive without the explanations that I put in the first post of this thread... 1973-1991 squarebodies are in the squares folder. https://www.mediafire.com/folder/jjw...xehexw6/shared

[70K10Hunter]

I"ve been searching for specific info on my A/C system for awhile found your links and downloaded a few. theres a wealth of info here thanks.

[57NAPCO]

A big thank you hatzie, what a ol' truck blessing you've given us.

[Dads79GMC]

Thank you hatzie!!!! I have a 24 inch plotter that I plan on using to print the 1979 C10 wiring diagram out on....! I've used this thread several times and never thanked you.

Thanks Mike

[hatzie]

Originally Posted by Dads79GMC

Thank you hatzie!!!! I have a 24 inch plotter that I plan on using to print the 1979 C10 wiring diagram out on....! I've used this thread several times and never thanked you.

Thanks Mike

You can print the wiring diagrams at Fedex Office. You need to get the attention of the counter staff to print banner pages like these. If you ask nicely they can enlarge to slightly larger and wider pages. I would suggest doing it in the wee hours at one of the all night locations like Downtown Salt Lake City.
I'm going to re-scan some of the less than perfect wiring diagrams at higher resolution on the newer scanner, that handles 120" long pages in one shot, over Christmas this year... I HOPE...

[kikkegek]

thank again for uploading these manuals. Altough Im no longer active on these forums, but mostly on facebook, I have pointed tons of people to these topics, because of the awesome information you share here.

[Danmcg]

Hey Twisted, I tried the link you posted for your site and it didn't work for me. I get a 404 not found.

[gearheads78]

Has anyone downloaded any of these lately? I just tried to get a wire diagram for my 78 and now my cuputer is going nuts with virus warnings.

[hatzie]

Originally Posted by gearheads78

Has anyone downloaded any of these lately? I just tried to get a wire diagram for my 78 and now my computer is going nuts with virus warnings.

Just downloaded the 78 wiring diagrams to a USB stick. This PC is running Linux so I wouldn't assume my virus scanner would find Windows bugs. I checked the file with different virus scanners on four different windows machines and I'm not seeing any untoward attempted network traffic through the firewall from my guinea pig, Sitting Duck, where I opened the file.
No virus found by the software on the windows boxes.
I believe Mediafire does a virus scan on incoming files to avoid being a virus distribution hub.

That being said. It's the wild west out there. Ad servers are becoming virus vectors. That's why I run script and ad blockers even tho I'm running my own distro of Linux that has a low probability of infection with your garden variety Windows viruses. Android is Linux based and there are inroads by the malware creators into that ecosystem so I'm not saying that "Linux can't be infected". It most certainly can and viruses do exist for my OS.
I air gap the machine by unplugging the network cable when I'm not using the network.
I would highly recommend getting NoScript for Firefox and only temp whitelisting the minimum URLs to make individual web pages work til you get a handle on your comfort levels with various servers.
I largely run Firefox because Chrome tends to neuter ad and script blockers (no big surprise, Google is funded by advertisers) and I don't run the Microsoft or Apple browsers so I have no idea what's available for Safari or Edge.

[gearheads78]

Originally Posted by hatzie

Just downloaded the 78 wiring diagrams to a USB stick. This PC is running Linux so I wouldn't assume my virus scanner would find Windows bugs. I checked the file with different virus scanners on four different windows machines and I'm not seeing any untoward attempted network traffic through the firewall from my guinea pig Sitting Duck where I opened the file.
No virus found by the software on the windows boxes.
I believe Mediafire does a virus scan on incoming files to avoid being a virus distribution hub.

That being said. It's the wild west out there. Ad servers are becoming virus vectors. That's why I run script and ad blockers even tho I'm running my own distro of Linux that has a low probability of infection with your garden variety Windows viruses. Android is Linux based and there are inroads by the malware creators into that ecosystem so I'm not saying that "Linux can't be infected". It most certainly can and viruses do exist for my OS.
I air gap the machine by unplugging the network cable when I'm not using the network.
I would highly recommend getting NoScript for Firefox and only temp whitelisting the minimum URLs to make individual web pages work til you get a handle on your comfort levels with various servers.
I largely run Firefox because Chrome tends to neuter ad and script blockers (no big surprise, Google is funded by advertisers) and I don't run the Microsoft or Apple browsers so I have no idea what's available for Safari or Edge.

Thanks I will look in to it again