85 s10 blazer 2.8 4wd vacuum/emission diagram - Hot Rod Forum : Hotrodders Bulletin Board
Hotrodders.com -- Hot Rod Forum



Register FAQ Search Today's Posts Unanswered Posts Auto Escrow Insurance Auto Loans
Hot Rod Forum : Hotrodders Bulletin Board > Tech Help> Electrical
User Name
Password
lost password?   |   register now

Reply
 
LinkBack Thread Tools
  #1 (permalink)  
Old 11-09-2004, 06:47 PM
boz boz is offline
Registered User
 
Join Date: Nov 2004
Location: dallas, tx
Age: 52
Posts: 1
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
85 s10 blazer 2.8 4wd vacuum/emission diagram

I recently bought this truck and have found several vacuum lines disconnected or burnt. Where could I get a diagram listing all vacuum lines including the 4wd unit, it does not engage.

    Advertisement
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
  #2 (permalink)  
Old 11-09-2004, 09:05 PM
Restore60s's Avatar
Member
 
Join Date: Aug 2004
Location: Kentucky
Age: 55
Posts: 291
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Vacuum Lines

I think you can still get the Haynes service manuals from places like Advance that covers the vacuum system. Also if you know anybody at the local GM dealer in service you will more than likley find a room full of old service manuals that you can make copies of. GM has most info on shop computers now but most dealers still have the old books. I've got 2 different dealers here and if I can't find something they let me make copies from their old shop library.
Reply With Quote Quick reply to this message
  #3 (permalink)  
Old 11-10-2004, 09:16 AM
Stinkin_V8's Avatar
Suburbanite Member
 
Last photo:
Join Date: Apr 2002
Location: SK, Canada
Age: 46
Posts: 323
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
I don't know it this helps but IIRC, there are three vacuum lines on the transfer case. One comes from the engine, one goes to the vacuum module that engages the front diff. Can't remember where the third goes, but they should be bundled together as the go into the transmission tunnel on the right side. Edit: the third line is the fluid overflow, ends up behind the right headlight

When you manually shift the transfer case, the vacuum switch on the case will engage the module in the engine compartment. The module pulls a cable that should engage the front diff.

It's common for the switch on the case to fail, but equally as common for hoses to be melted/split/fallen off. There are two electrical connectors on the console - one is from the T-case to tell you what gear it's in and the other is from the front diff to tell you if it's engaged or not.

I've got the Haynes S-10 manual and I don't remember seeing a vacuum diagram in there, but I could be wrong - it's been a long time since I looked.

Good luck.
__________________
When life hands you lemons, ask for tequila and salt

Last edited by Stinkin_V8; 11-14-2004 at 08:37 AM.
Reply With Quote Quick reply to this message
  #4 (permalink)  
Old 11-10-2004, 02:36 PM
chevelle_502's Avatar
Get out the ducktape...
 
Last wiki edit: How to rebuild an engine
Last journal entry: Front brakes
Last photo:
Join Date: Jun 2004
Location: Georgia
Age: 28
Posts: 213
Wiki Edits: 5

Thanks: 0
Thanked 0 Times in 0 Posts
I got your truck in the 2wd version. Good luck with the diagrams, I havent ever been able to find any of them. Checked the dealer shop books and all. If your vacuum setup on top of the engine is the same, there is a multi-connector where several of the vacuum lines converge. I tried to order said part and was left to 'fabricate"something of my own. have fun with it.
Reply With Quote Quick reply to this message

Recent Electrical posts with photos

Quick Reply
Message:
Options

Register Now

In order to be able to post messages on the Hot Rod Forum : Hotrodders Bulletin Board forums, you must first register.
Please enter your desired user name (usually not your first and last name), your email address and other required details in the form below.
User Name:
If you do not want to register, fill this field only and the name will be used as user name for your post.
Password
Please enter a password for your user account. Note that passwords are case-sensitive.
Password:
Confirm Password:
Email Address
Please enter a valid email address for yourself.
Email Address:

Log-in

Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.




Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools

Posting Rules
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On



All times are GMT -6. The time now is 01:41 PM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2014, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0 PL2
Copyright Hotrodders.com 1999 - 2012. All Rights Reserved.