Question about 1995 GMC Jimmy

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I bought a 94 jimmy and i cant figure out were the vacuum lines go. i found the hook up behind the distributor and the 3 hook ups on the transfer case but i cant get a diagram on where all these go. can you help me

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There should be a diagram under the hood, or on the firewall or even on the radiator bracket. Manufacturers put it anywhere under the hood.

Posted on Nov 10, 2010


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On my 1995 Gmc Jimmy i have the indash switch which i bought from a dealer. I checked accuator and cable. Cable was stuck but i freed it up. I had four hi working for about a day now it blinks and goe

Still sounds like a vacuum problem - not enough vacuum to hold the solenoid in. You could try directly applying a good vacuum source (either connecting to a good line on the truck or using a vacuum pump) to see if the solenoid is working properly. If that works, you will need to recheck ALL vacuum lines. You could also check for DTCs to see if it might be a computer problem.

Nov 16, 2014 | 1995 GMC Jimmy

1 Answer

I have a 94 jimmy that keeps loadingup the plugs and jumps timing but the timeing chain is not loose or strechedthe motor is strong but i cant keep it running

If you have a distributor cap with a rotor , it is possible that the gear on the bottom of the distributor is striped. It is driven off a similar gear on the cam shaft.

Feb 13, 2011 | 1994 GMC Jimmy

3 Answers

Were is the vac switch on the transfer case for the 4 wheel drive

Hi, the vacuum switch is located in the top of the transfer case, in the area where the front drve shaft goes out. There is a 3 vacuum hose connector that attaches to it. Good luck...Coop

Dec 26, 2010 | 1995 GMC Jimmy

1 Answer

I just bought a 95 gmc jimmy 4.3 vortec with 4wd and underneather on the frontend differential there is a bar sticking out that is welded to stay out and my jimmy will not go into 4wd at all why and how do...

I don't know what the bar is for, but I can help you troubleshoot the 4wd. I have a 1996 4wd Jimmy. The 4wd didn't work when I bought it. Here is what I found. The vacuum lines at the rear of the engine compartment were soft and gummy and some were rotted. I replaced every vacuum line I could find. Hidden underneath the battery tray is a vacuum operated actuator that engages the front axle. This line was not connected at all. I popped the push button assembly out of the dash to make sure everything was connected and replaced the light bulbs. Installed the switch back in the dash and went for a test drive. Everything is now working as it should. Did the testing on a dirt drive. Never on dry pavement. There are also electrical connectors underneath the vehicle that must be checked. They are attached to switches on the transmission and the transfer case. Let me know if this helps you get your 4wd working again.

Dec 25, 2010 | 1995 GMC Jimmy

1 Answer

Heat stuck on high heat with no blower working

Check your fuse on the side of the dash, driver side. Look to make sure the fuse has not gone bad, and replace if the fuse to your HAVC has gone bad.
The other thing that can cause this issue is bad vacuum line to your HAVC system. On the drivers side by the corner where the windshield meets in the engine compartment, there is where your vacuum canister. Follow the vacuum lines and look for any damaged lines throughout your jimmy and replace any damage lines.
Poor vacuum will cause the issues your have described and the other thing also that has been found is the vacuum switch to your 4WD on the transfer case to go bad and leak transmission fluid in to your vacuum line causing the same issues you have described.
Start from the beginning and 1.check the fuse, 2, check the vacuum line. 3 check to make sure there is no transmission fluid throughout your vacuum lines and replace the vacuum switch on the transfer case if there is. ($15.00 part at Auto Zone or Napa)
Thank you for using fixya and good luck

Jun 03, 2010 | 1999 GMC Jimmy

1 Answer

Need 95 gmc jimmy vacuum diagram. I have a loose

THat goes to your map sensor. If you look very closely under your hood there will be a vac line diagram there

May 09, 2010 | 1995 GMC Jimmy

2 Answers

Not sure where 4WD vacuum hoses hook up at

That hose is just a breather hose to vent the pressure inside the transfer case.

Aug 02, 2009 | 1997 GMC Jimmy

1 Answer

Wont idle


Jun 10, 2009 | 1989 Jeep Wrangler

2 Answers

Front drive, 4 Wheel drive won't engage

that vacume line goes back to the transfer case, the end that goes behind the motor hooks to a steel tube so it does not get hot from the exhaust., my guess it should be hooked up so it will feed vacume to the vacume ball so it can lock in the axels. if you start the car and shift into 4 wheel drive and listen under hood you should hear a hissing sound, that is vacume, if you can't hear it there, you may have to craw under the right side to hear it, probably came unhooked underneith the car

Feb 01, 2009 | 1995 GMC Jimmy

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