PDF of Square Schematics & GM Training Manuals

[hatzie]

** Added GM Delco radio manuals Oct 2015...

Over the years I have collected a bunch of GM service literature.
I own GM 1967-1980, & 1983-1991 GM Light Truck schematics as well as 1973-1991 GM Light Truck and 1984-1987 D-series CUCV Parts manuals. I also own many of the 67-91 Unit-Repair/Overhaul, Service, and Emissions Driveability Manuals.
Links to PDF Scans of service and STG manuals and a links to the Parts manuals. You'll need the FREE Adobe Acrobat reader to open these files. Get it directly from Adobe here {http://get.adobe.com/reader/}
If you're not interested in Adobe products there are several lightweight alternatives. wikipedia.org List_of_PDF_software
TechRepublic Review of five-lightweight-and-free-pdf-viewers/ an important fact they left out is... Foxit is Ad supported so factor that in.


Please Save these files on your local machine. Do not open in your web browser. The Mediafire PDF reader is not compatible with the Searchable PDF document type. The OCR text is visible along with the page image in the same space.

If you're good at loosing files Google "Void Tools Everything" and download direct from the developer. I've used this file search tool for years. It will find any misplaced file...

It looks like Mediafire has begun compressing PDF files as .gz GZIP archives. You can un-compress it with a universal file archive tool.
I use 7-ZIP because it opens darn near all archive formats, it's lightweight & fast, it's free, and so far it comes with no spyware or adware. http://www.7-zip.org.

Last and Not Least... These scans make a nice electronically searchable reference. But. I highly recommend buying used or even new paper copies. There's nothing like holding the book in your hands...

1973-1991 GM Light Truck Service, "Unit Repair" or Overhaul, and Wiring Manuals.

Notes;
-The earlier service manuals are interesting. They're geared toward troubleshooting rather than changing parts. They have a lot of basic procedure and theory of operation information you don't normally find in aftermarket and modern OEM service manuals.
-The Unit Repair and Overhaul manuals have in-depth GM re-build information on Axles, AC compressors, Hydro-Boost, Engines, Transmissions, and Transfer Cases.
-68-86 GM wiring manuals are 11.5"x36" fold-out pages. My scanner has a max page length of 34". These manuals require that I scan from each end, save as 0 compression TIFF, and stitch where the diagrams aren't real busy in GIMP 2.8 64bit.
-75 & 76 Light Duty Service & Overhaul Manual Supplement are supplements to 1974 Light Duty Service and Overhaul Manuals
-74, 75, 76 Medium & Heavy Duty service manuals are supplements to 1973 Medium & Heavy Duty Manuals.
-78 & 79 Medium & Heavy Duty service manuals are supplements to 1977 Medium & Heavy Duty Manuals.
-87-91 GM wiring manuals are A3 pages. I scanned these from cover to cover.
-87 wiring diagrams have an odd layout.
-81 & 82 8.5x11 GM wiring diagrams can be found in the back of the service manuals but these are a bit harder to follow as they don't carry the circuit from end to end on one page like the 11x36 pages.

• 1973
• ST333-73 1973 Chevrolet Passenger Car and Light Truck Overhaul Manual
• ST330-73 1973 Chevrolet Light Truck Service Manual
• 1973 GM CK Light truck Wiring Manual
• ST-331-73 1973 Chevrolet 40-60 Medium Duty Truck Service Manual
• ST-332-73 1973 Chevrolet 70-90 Heavy Duty Truck Service Manual
• .
• 1974
• ST333-74 1974 Chevrolet Passenger Car and Light Truck Overhaul Manual
• ST330-74 1974 Chevrolet Light Truck Service Manual
• 1974 GM CK Light truck Wiring Manual
• ST-331-74 1974 Chevrolet 40-60 Medium Duty Truck Service Manual Supplement
• ST-332-74 1974 Chevrolet 70-90 Heavy Duty Truck Service Manual Supplement
• .
• 1975
• ST330-75 1975 Chevrolet Light Truck Service and Overhaul Manual Supplement
• 1975 GM CK Light truck Wiring Manual
• ST-331-75 1975-76 Chevrolet 40-90 Medium & Heavy Duty Truck Service Manual Supplement
• .
• 1976
• ST330-76 1976 Chevrolet Light Truck Service and Overhaul Manual Supplement
• 1976 GM CK Light truck Wiring Manual
• ST-331-75 1975-76 Chevrolet 40-60 Medium & Heavy Duty Truck Service Manual Supplement
• .
• 1977
• ST330-77 1977 Chevrolet Light Truck Service Manual
• ST333-77 1977 Chevrolet Passenger Car and Light Truck Unit Repair Manual
• 1977 GM CK Light truck Wiring Manual
• ST-331-77 1977 Chevrolet 40-60 Medium Duty Truck Service Manual
• ST-332-77 1977 Chevrolet 70-90 Heavy Duty Truck Service Manual
• .
• 1978
• ST330-78 1978 Chevrolet Light Truck Service Manual
• ST333-78 1978 Chevrolet Passenger Car and Light Truck Unit Repair Manual
• 1978 GM CK Light truck Wiring Manual
• ST-331-78 1978 Chevrolet 40-90 Medium & Heavy Duty Truck Service Manual Supplement
• .
• 1979
• ST330-79 1979 Chevrolet Light Truck Service Manual
• ST333-79 1979 Chevrolet Passenger Car and Light Truck Unit Repair Manual
• 1979 GM CK Light truck Wiring Manual
• ST-331-79 1979 Chevrolet 40-90 Medium & Heavy Duty Truck Service Manual Supplement
• .
• 1980
• ST330-80 1980 Chevrolet Light Truck Service Manual
• ST333-80 1980 Chevrolet Passenger Car and Light Truck Unit Repair Manual
• 1980 GM CK Light truck Wiring Manual
• ST-331-80 1980 Chevrolet 40-60 Medium Duty Truck Service Manual
• ST-332-80 1980 Chevrolet 70-90 Heavy Duty Truck Service Manual
• .
• 1981
• ST_330_81_1981_Chevrolet_Light_Truck_Service_Manual
• ST_333_81_1981_Chevrolet_Passenger_Car_and_Light_Truck_Unit_Repair_Manual
• 1981 GM CK Light truck Wiring Manual Will scan and post if I can purchase or borrow one for scanning. 8.5x11 schematics are in the back of the service manual.
• ST_356_81A_1981_Advance_Information_Shop_Manual_Supplement
• .
• 1982
• X8232_1982_GMC_Light_Duty_Truck_Service_Manual
• 1982_GM_CK_LIGHT_TRUCK_Wiring_Manual_Pgs_1B-1G*** NEW 3-6-2016 ***
• .
• 1983
• ST_330_83_1983_Chevrolet_Light_Truck_Service_Manual
• ST-386-83 1983 Truck Wiring Covering CK P G-Van 10-30 & ST GM Light Duty Trucks
• .
• 1984-1987 CUCV
• US Army Technical Manuals TMs jatonka CUCV-TM download page
• .
• 1984
• X8432_1984_GMC_Light_Duty_Trucks_Service_Manual
• X8430_1984 GM CK 10-30 Light Truck Wiring Manual
• .
• 1985
• 1985 GM CK Light Truck Wiring Manual
• ST 382-85 1985 GM CK Light Truck Service Manual
• ST 382B-85 1985 GM CK Light Truck Service Manual Correction and Revision Pages
• .
• 1986
• X8632_1986_GMC_CK_G_P_Light_Duty_Truck_Service_Manual
• X8637_1986_GMC_Light_Duty_Truck_Unit_Repair_Manual
• 1986 GM CK Light Truck Wiring Manual
• .
• 1987
• ST_330_87_1987_Chevrolet_Light_Truck_Service_Manual
• ST_333-87 1987 Chevrolet Light Duty Truck Unit Repair Manual
• X8736_1987_GMC_Light_Duty_Truck_Fuel_and_Emissions_Including_Driveability
• 1987 GM RV Light Truck Wiring Manual
• .
• 1988
• X8832_1988_GMC_RVGP_Light_Duty_Truck_Service_Manual
• ST333-88 1988 Chevrolet Light Duty Truck Unit Repair Manual
• X8836_1988_GMC_Light_Duty_Truck_Fuel_and_Emissions_Including_Driveability
• 1988 GM RV ST CK P G M Light Truck Wiring Manual
• .
• 1989
• ST_350_1989_GM_RV-P_Light_Duty_Truck_Service_Manual
• X8937_1989_GMC_Light_Duty_Truck_Unit_Repair_Manual
• X8936_1989_GMC_Light_Duty_Truck_Fuel_and_Emissions_Including_Driveability
• 1989 GM RV & P Light Truck Wiring Manual
• .
• 1990
• X9032_1990_GMC_RVGP_Light_Duty_Truck_Service_Manual
• ST50290SB_1990_Service_Bulletins_Supplement
• X9037_1990_GMC_Light_Duty_Truck_Unit_Repair_Manual
• 1990 GM RV & P Light Truck Wiring Manual
• .
• 1991
• X9132_1991_GMC_RVGP_Light_Duty_Truck_Service_Manual
• ST333-91 1991 Chevrolet Light Duty Truck Unit Repair Manual
• X9136 1991 GMC_Light_Duty_Truck_Fuel_and_Emissions_Including_Driveability
• X9130 1991 GM RV & P Light Truck Wiring Manual
• .
• 1995 GM Transmission Transfer Case Overhaul Manual for NV3500, NV4500, 4L60E, 3L80E, 4L80E, NP241, & NP231
• 1998 GM Manual Transmission and Transfer Case Overhaul Manual for NV3500, NV4500, NP246, NP241, & NP231
• NP233 Transfer Case Overhaul Manual

GM STG (Service Training Group) Textbooks and References

AC

• 11004.00-2 GM STG Fundamentals of Air Conditioning

Axles & Steering

• 1973-1980 GM Dana 44 Front Axle
• 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
• 1980-1983 GM Corp (10 Bolt) Front Axle
• Quick Req Parts & Illustration 1973-1983_Front_Axle_Hub_Gears_Front_Driveshaft_Steering_Linkage
• GMC_1500_2500_3500_Power_Steering_Service_Training_Booklet
• Driveline vibration diagnosis thread on this board

Brakes

• 15000.01-1 GM STG Base Brake Systems
• 15001.00-2 GM STG Drum Brakes
• 15004.50-2 GM STG Introduction to ABS.pdf
• 15005.11-C GM STG Light Truck Kelsey Hayes ABS Brake Bleeding Procedure Quick Reference Card

Cruise Control Systems

• GM STG 1968-1982_Cruisemaster_Cruise_Control
• GM STG 1984 GM Cruise III Training and Service
• GM STG 1992-1998_CK_Electro_Motor_Cruise_Control Used on the T400 chassis gas and DB2 diesel trucks. This is simple and self contained so it can be adapted to earlier vehicles.

Diesel

• ST37182_Chevrolet_Diesel_Fuel_Systems_Manual
• 1978-1980 GM STG Oldsmobile 350N Diesel Engine
• 1981-1985 GM STG Oldsmobile 5.7L 350DX Diesel Engine
• 16015.03-1A GM STG 1981 Advanced Diesel Stanadyne-Roosa-Master Injection Pump & Fuel System Troubleshooting (DB2 Series Injection Pump)
• 16015.05-1C 1987 GM STG The 6.2L Diesel Engine
• TSB_89-329-6 1982-1989 6.2L_Hard Starting Cold HPCA (Housing Pressure Cold Advance) Replacement ** NEW Mar 23 2014 ** Not my scan...
• 16015.12-1 1991 & 1992 GM STG 6.5 Litre V8 Turbo Diesel Engine ( DB2 Mechanical Fuel Injection System )
• 16015.15-2 1994-1995 GM STG 6.5 Litre V8 Turbo Diesel Engine ( DS4 OBD I Electronic Fuel Injection System )
• GMT9495DSLUD 1994-95 GM P Series & 1994 GM CK Series Diesel Electrical Diagnostic Supplement
• 1996-2000 GM STG 6.5 Litre V8 Turbo Diesel Engine ( DS4 OBD II Electronic Fuel Injection Systems )

Electrical

• 1901-1 GM STG Delco Truck Charging Systems
• 16201.00-3 GM STG Charging and Starting
• 1007-2 Windshield Wiper Systems
• GM_STG_18001_02_VA_Wiring_Assembly_Repairs*** NEW OCT 14, 2015 ***
• Packard Electric Repairing Wiring Harnesses

Fuel Systems

• 16009.10-1A GM STG Fuel Injection
• 16009.06-1A GM STG Port Fuel Injection
• 16009.07-1A GM STG Advanced Port Fuel Injection
• 16009.BB-2 GM STG 1992 Port Fuel Injection SYSTEM DIAGNOSIS 1992 GM V8 RPO LB9, LT1, LT5, L98 and 1992 GM L-4 RPO LE4, LN2, LD2, LG0, & L40

Transmission / Transfer Case

• 14003.01-3 GM STG NP208 Transfer Case
• 1973-1984_NP205_Quick_REQ_Parts_Sheets
• 17001.11-1A GM STG Turbo Hydramatic 700R4 Automatic Transmission
• 17021.24 GM STG Hydramatic 4L80-E Transmission Electrical Supplement

Tech Writeups

• List of SAE rated hoses to use for Fuel, Oil Cooler, Transmission Cooler, and Vacuum Booster. http://67-72chevytrucks.com/vboard/s...d.php?t=696742
• List of Hose Clamp types.http://67-72chevytrucks.com/vboard/s....php?p=7471241
• Dual Tank Theory of Operation. http://67-72chevytrucks.com/vboard/s...d.php?t=754061
• Voltage Drop Testing Start at Post #18.http://67-72chevytrucks.com/vboard/s...d.php?t=720690
• PC & Android Based ALDL (Assembly Line Data Link) Diagnostic Software and Interfaces.http://67-72chevytrucks.com/vboard/s...d.php?t=698079

1973-1991 GM Light Truck Parts and Illustration Catalogs

Hosted at: http://gmpartswiki.com

It's hosted with free access by Ian Harding. My scans of the 1973-1991 CK RV parts catalogs are searchable PDF files weighing in at 80-100 meg for each catalog set.
The site is organized by printing date not coverage dates. This list should allow you to find which CK RV catalog you need to search.

• Catalog 51- 1973-1978 Feb, 1983 Printing GM CK G P Light Truck Parts
• Catalog 51A 1973-1978 Feb, 1983 Printing GM CK G P Light Truck Illustrations
• Catalog 52A 1979-1984 Sep, 1984 Printing GM CK Light Truck Parts & Illustrations
• Catalog 52D 1984-1987 Oct, 1986 Printing GM D1-D3 1984-1987 CUCV Military Light Truck Parts & Illustrations
• Catalog 52R 1985-1988 Jan, 1988 Printing GM CK 85-86 RV 87-88 Light Truck Parts & Illustrations *** Ian Harding scanned this catalog ***
• Catalog 52R 1985-1991 Sep, 1990 Printing GM CK 85-86 RV 87-91 Light Truck Parts & Illustrations
  
  Medium Trucks...
• Catalog 78TM 1973-1978 Sep, 1982 Printing GM 5000 & 6000 Medium Truck Parts
• Catalog 82TM-GR-F 1973-1982 Jul, 1983 Printing GM Steel Conventional & Tilt AND School Bus Parts & Illustrations

Light Trucks Parts Books on My Server...

Note: you need both Parts and Illustration books to have a complete manual.

1973-1978 C/K G P

• 51_1973_1978_GM_Light_Truck_Parts_1983_Printing
• 51A_1973_1978_GM_Light_Truck_Illustration_1983_Printing

1978-1984 C/K G P

• 52A_1979_1984_PARTS_CATALOG_1984_PRINTING
• 52A_1979_1984_ILLUSTRATION_CATALOG_1984_PRINTING

CUCV

• 52D_1984_87_CUCV_Parts_and_Illustration_Catalog

1985-86 C/K 1987-91 R/V

• 52R_1985_86_CK_1987_91_RV_LIGHT_TRUCK_PART_NUMBER_CATALOG
• 52R_1985_86_CK_1987_91_RV_LIGHT_TRUCK_PART_ILLUSTRATION_CATALOG

Radios ********** NEW May 22, 2015
Before you download these manuals. You will need more than a passing acquaintance with electronics repair and a bench of electronics tools. This does not mean a 40W Radio shack soldering iron and a precision screwdriver set.
You will likely need at a minimum a good Benchtop DC power supply capable of at least 24v and 3A, VTVOM, Analog Volt Ohm Meter, Digital Volt Ohm Meter, Precision Temp Controlled Solder Station, and various hand tools... You may need a good Oscilloscope, frequency counter, and Audio signal generator.
If you think I'm trying to scare you... I am.
If you don't have all or most of the above tooling, lots of patience, and a fair amount of experience with electronics and your tools (you didn't just buy em)... farm it out to one of the many competent radio guys. You'll be many dollars, a bunch of frustration, and lots of time ahead.
I have been searching for these as a complete un-butchered GM Radio manuals for a very long time. Be aware that most "complete radio manuals" on Fleabay are not anything of the sort. The Manual Mafia separate these into the internal chapters, label the chapters as a complete manual for whatever radio is on the first page, and sell them one chapter at a time for $30-$50 a chapter. They are cutting a rare reference book into chapters and spreading them to the four winds.



Service Manuals & Info

• 1975: 6D-1975-2_Radio_Service_Handbook.pdf
• 1978: 6D-1978-1_Radio_Service_Handbook.pdf ** NEW October 9, 2015 **
• OEM Radio Wiring Connectors & Terminals: http://67-72chevytrucks.com/vboard/s...9&postcount=13

Useful Docs and Spreadsheets
What follows is an Excel 97 spreadsheet I put together several years ago to calculate the Speedo gears and engine RPM at various highway speeds. I was doing a "What-If" on transmissions, tires, and axle gear-sets and wanted to get transmission/transfer-case speedo gears as close to correct as possible. My 76 reads 1-2mph higher than actual speed. If my speedo reads 35 the local police dept's "Your speed is this" sign will read 33 or 34.

For Speedo gears you only need to edit the Tire Size & Axle ratio. The speedo gear table will automagically calculate the ideal Driven and Drive gears.
You then get to find which ones you can actually buy. You can edit the ratio adapter section to get you closer... If the gears you can actually buy are not close enough.

For the RPM tables you'll need to edit the transmission and Transfer case gear ratios as well. There are tables of ratios found in common trannys and transfer cases in the RH pane.

• RPM_Gear_Axle_Transmission_TransferCase.zip archive with Excel 97 XLS format and Libre Office / Open Office ODS format.
• Screen Grab of RPM_Table_Spreadsheet.ods open in Libre Office Calc

The Free Apache Open Office Suite https://www.openoffice.org/ and Free Libre Office Suite http://www.libreoffice.org/ 4.x and newer Office Suites "Calc" Spreadsheet applet will open and edit spreadsheets in Excel 97(XLS) & 2007 and newer (XLSX) formats. I lean toward Libre Office because the dev cycle for bugfixes and new features is shorter. Google Docs should open it on the web as well.
.XLS files sometimes have visual formatting issues in Libre Office and .ODS files have formatting issues in some versions of Excel. They will both open in either office package but I included both for more appealing visual layout in the office package of your chioce.

There are no Macros or VB Scripts. It's just a spreadsheet with some fairly complex formulas and color formatting.
MAC OSX and Windows Operating Systems since Windows XP have been able to open ZIP files without extra software if the functionality is not disabled by system policies. If you want a Free Open Source Archive tool get the 7-Zip tool http://www.7-zip.org/ If you don't like using 7Zip from the command line in Linux there's a GUI called PeaZip

Have a good one.

[joe231]

That's awesome!
Thanks for taking the time and sharing them.
Posted via Mobile Device

[Billy81]

Originally Posted by joe231

That's awesome!
Thanks for taking the time and sharing them.
Posted via Mobile Device

X2

[powerdriver 1958]

That will Help me a bunch , Thank You

[INSIDIOUS '86]

Somebody archive or sticky this?
Posted via Mobile Device

[Axle]

Thanks for taking the time to scan and make them available.

Alex.

[quadzero]

I have a 1983 Gm 10 bolt in my basement that I'm working on now, you just made my day. My hat is off to you, thanks.

[arrover]

Very cool. Thanks!

[hatzie]

Originally Posted by quadzero

I have a 1983 Gm 10 bolt in my basement that I'm working on now, you just made my day. My hat is off to you, thanks.

You're welcome.

[mopar346]

You have done a great service, one of the guys on the Jeep forum did that with all 3 CJ manuals, about 2500 pages THAT was a lot of work. I hate to know how many pages all these were.

Thank you!

[hatzie]

Originally Posted by mopar346

You have done a great service, one of the guys on the Jeep forum did that with all 3 CJ manuals, about 2500 pages THAT was a lot of work. I hate to know how many pages all these were.

Thank you!

2,500 service manual pages is a bunch of work. Service manuals are pretty difficult. The pages are thin and they're usually glue spine bound like paperback books that you need to get carefully cut off.
I scanned @7,000 pages from all six 73-91 parts books and Ian Harding hosted them on gmpartswiki.com for us. They are posted by publishing date and not coverage date so... Thankfully they are all loose leaf 3 ring bound on heavy bond paper the sheetfeed scanner passed them through in several hours over 5 days.

Several reasons to do this. The parts manuals are searchable PDF files now and I can bag the originals to keep them dry and stuff them in a metal box in the attic.
Helm is no longer printing the wiring manuals and some of mine are getting a little yellow around the edges. Not brittle yet but that's the next step.
Electronic copies backed up to the cloud in several places keeps them available to everyone and it'll be difficult to loose access to them via age and acts of god.
It's good Karma too.

[BorgDog]

This is pretty awesome thanks!

Do you happen to know of a source that has pdfs of owners/drivers manuals for these years?

[hatzie]

Originally Posted by BorgDog

This is pretty awesome thanks!

Do you happen to know of a source that has pdfs of owners/drivers manuals for these years?

Maybe The Old Car Manual Project http://tocmp.org

[savatreatabvr]

Originally Posted by hatzie

2,500 service manual pages is a bunch of work. Service manuals are pretty difficult. The pages are thin and they're usually glue spine bound like paperback books that you need to get carefully cut off.
I scanned @7,000 pages from all six 73-91 parts books and Ian Harding hosted them on gmpartswiki.com for us. They are posted by publishing date and not coverage date so... Thankfully they are all loose leaf 3 ring bound on heavy bond paper the sheetfeed scanner passed them through in several hours over 5 days.

Several reasons to do this. The parts manuals are searchable PDF files now and I can bag the originals to keep them dry and stuff them in a metal box in the attic.
Helm is no longer printing the wiring manuals and some of mine are getting a little yellow around the edges. Not brittle yet but that's the next step.
Electronic copies backed up to the cloud in several places keeps them available to everyone and it'll be difficult to loose access to them via age and acts of god.
It's good Karma too.

My 1973 Chevy Light Truck Service Manual has 979 pages! It's almost exhausting looking through that thing, lol!

[hatzie]

Added 1991 RV P Schematics.
GM got serious about troubleshooting with these. This manual actually includes harness routing diagrams and component locators along with troubleshooting tables.

[puppy]

Thanks again!

Sticky! Sticky! Sticky!

[kikkegek]

YOU THE MAN!

I was just looking for a NP208 manual, because mine is leaking ATF and I wanted to see how hard is to take these babys apart...WOW, thanks for sharing!

[motornut]

sweet, thanks

[bigsj]

Thanks they will come in handy...

[Skunksmash]

Hell yeah brotha!!

[Redcap]

Thank you for sharing these! Adding them to my archives.

[MallorcaC10]

I am a new member from an island east off Spain, starting my restoration of a 1970 c20 with a 350 in it. Does anyone know where can I download or get a pdf copy of a manual?

Thanks a lot

[John Gilbert]

Not to sound unappreciative, but thanks to you posting this wonderful information I have now aborted my plans to actually be on time for a deadline, and spend at least four hours glomming this stuff.

Thanks!

[Twisted78SS]

As I have done for many others, I have these posted along with tons of other documents over on my site just on the off chance the boards lose them or your account goes away.
http://www.2heeldrive.com/Chevrolet/

I'm adding content fairly regularly, but let me know if you need something and don't see it listed.

[hatzie]

Originally Posted by Twisted78SS

As I have done for many others, I have these posted along with tons of other documents over on my site just on the off chance the boards lose them or your account goes away.
http://www.2heeldrive.com/Chevrolet/

I'm adding content fairly regularly, but let me know if you need something and don't see it listed.

I can directly link to the PDF files you copied to your site as Mirror-1 in the OP. Assuming it's OK to direct link to your site. My intention is to add at least one more mirror as time goes on.