Question about 1995 GMC Jimmy

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Vacum lines on the transmisson should there be any lose hoses

My jimmy will not shift out of first was told it could be a vacuum hose come lose

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  • GMC Master
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There is no vacuum lines to transmission
the problem with the first gear only you have to retrieve the code of transmission problem first and take trans. o?l level

Posted on Apr 25, 2015

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Posted on Jan 02, 2017

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SOURCE: 1998 gmc jimmy has no 4x4 anymore

Hi there. under your battery is the 4x4 actuator. there should be a vacuum hose that is connected to it. this actuator is the one that will lock your front diff in 4x4. this hose could fall off and you will not have 4 wheel drive without it connected.If that hose is connected, there is another hose which comes from the vacuum switch up the back of the engine and over toward the driver side of the engine compartment. it tees off and one end goes to a little resevoir on the engine hood. with the engine running, check to see if you have vacuum to this hose. also with thye engine running press the 4x4 switch and make sure that the actuator os working. the vacuum should **** the diaphram in and hold it in. If there is vacuum to the diaphram when 4x4 is engaged but the diaphram doesn't hold, you will need a new actuator. Hope this helps you.

Posted on Dec 29, 2008

  • 1 Answer

SOURCE: a/c comes out of front defroster. I also found a vacuum hose lose near the front firewall and I cant find out where it goes.

vacuum hose over top of engine attaches to vacuum outlet port on intake manifold by pcv outlet port. this line is vacuum supply to heater controls.

Posted on Jul 10, 2009

  • 186 Answers

SOURCE: not sure where 4WD vacuum hoses hook up at

Isn't that an electronic motor on the case? If so then it's just a vent for the T-case. If not then it would go to a round ball canister on the fender.

Posted on Aug 02, 2009

ZJLimited
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SOURCE: looking for a vacum line diagram so i can print it 1996 gmc jimmy

GMC S10/S15/Sonoma Pick-Ups 1982-1993 Repair Manual
VACUUM DIAGRAMS (See Figures 1 through 85)

Below is a listing of vacuum diagrams for most of the engine and emissions package combinations covered by this manual. Because vacuum circuits will vary based on various engine and vehicle options, always refer first to the vehicle emission control information label, if present. Should the label be missing, or should vehicle be equipped with a different engine from the car's original equipment, refer to the diagrams below for the same or similar configuration.
Check the link autozone.com (free register), select the year ('91 sample), Brand, Model, Sub-Model, Engine Size and make the next root...
1991 GMC TRUCK S15 4WD 4.3L TBI 6CYL REPAIR GUIDE >> EMISSION CONTROLS >> VACUUM DIAGRAMS

I really hope helps with this (remember rated this help). Good luck.

Posted on Jan 07, 2010

  • 17 Answers

SOURCE: I need a vacuum hose diagram for 1999 gmc jimmy

go to a parts store and get the haynes manual. they have them for pretty much everything. they're only like 20 bucks and you can rebuild your car by going through it...they have wiring, vaccuum, brakes, everything. or google it. or check with GM, they should have that info

Posted on May 01, 2010

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1 Answer

I have 1995 gmc jimmy 4l60e trans long gates shift from 1 to 2


I am old school and do not know if vacum modulator still used , check if hose still ok . Modulators used to be cheap .
Hugh

Mar 10, 2017 | 1995 GMC Jimmy

1 Answer

My 1966 Tbird C6 downshifts too soon. What is the purpose of the vacum hose to the ******?


It's nice to hear about the good ole days. You likely have a vacuum leak, and it doesn't necessarily have to be at the modulator. Vacuum loss anywhere on the engine will result in no, or insufficient vacuum to the modulator. I remember the vacuum motor that controlled the "Hide-away" headlights would develop a vacuum leak and cause shift problems. The modulator may be faulty and the easiest way to find out is by pulling the hose of the modulator, if ATF runs out of the hose then the modulator is faulty. The kickdown may also be stuck. This is the metal rod that goes from the carburetor linkage to the transmission. The rod should move up and down freely at the transmission.

Apr 11, 2013 | Ford Econoline Cars & Trucks

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My 2005 chevy impala started jerking and then it wouldnt chnage gears unless i press the gas all the way to the floor is it the transmission?


no on 05 chevy the transmisson shift is control by vacume look for a vacume line that is dry rooted or has come off start at the engine first then work the way down to the transmisson. a line off or dry rotted any where in the syastem will give you a hard shift sometiimes like a hard jerking motion when
shifting.

Aug 10, 2011 | 2005 Chevrolet Impala

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The idle is very high when i go from park to drive it is very hard ****. and the gears are not shifting the same its winding out . and does not go in to passing gear and using a lot of fuel my first...


Check the vacuum lines, intake, and the idle/air control valve. This can cause a loss in power and fuel economy. The transmission issue sounds like it is either slipping or you have a faulty shift solenoid.

Mar 30, 2011 | 1995 GMC Jimmy

1 Answer

Will shift into 4-wheel drive lo 4 hi but front won't pull. rear wheels spin in a bind, no pull on front it is on a chev s-10 2001 model auto trans.


It sounds like the transfer ase is working ok. My guess is the problem is vacuum related. Check all your vacuum lines for loose connections, rotted rubber, etc. There is one line that goes to a vacuum operate actuator under the battery. You will have to remove the battery tray and battery to get to it. That is a large diameter vacuum hose that has to make a sharp bend to attach to the actuator. When it gets old and weathered, it loses it's flexibility and comes off the actuator. It controls the switch that locks the front axles. If hooking it back up gets your 4wd working again, replace all your vacuum lines to avoid future problems.

Jan 11, 2011 | 1996 GMC Jimmy

1 Answer

Car starts rough idles very low almost dies while idling and will die when put in gear. will not accelerate up hills (loses power). have been told there are many vacuum leaks and the transmission will...


your vacum leaks has alot to do with it have vacum leaks fixed auto parts store sells the correct size hose you need at a ver fair price fix vacum leaks first then see how it runs after thatcheck fluid level in transmission and change transmission filter

Dec 23, 2010 | 1990 Cadillac SeVille

2 Answers

My heater will only blow out of the dash vents and won't move to floor or defrosters. Many have said to change the vacuum hoses. Can anybody tell me where to find them? Do I need to take apart the dash?


Heater flap works on vacum lines. My jimmy had same problem. Found out flap broke inside heater core. Gmc had a default. If something breaks it goes to defrost as safety precaution. Or a vacum leak in a hose to heater.

Nov 22, 2010 | 2001 GMC Jimmy

1 Answer

Transmission will get stuck in a gear and wont up shift to the next gear or it will constantly up shift and down shift


suggest you check for a vacum line off that goes to the transmission modulator valve, which controls the shifting in transmission.or may possibly just be a bad modulator valve on the side of the transmission. 1st check for a vacum line off, with engine running do you hear a whistling or air sucking sound on top or rear of motor? if so, follow that sound to a hose or small black hose thats off.if you are driving the car and start off in low drive and can manually shift to upper gears with no problems,your problem is either a vacum line off, or it's a bad modulator valve on the transmission. hope this helps!!!

Nov 10, 2010 | 1992 Chrysler Lebaron

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

1 Answer

Ca/heater controls **** in vent mode


Just fixed same problem with my '98 Jimmy for under $3. The vacuum line comes thru firewall (semi-rigid 3/32" hose) with the main wire bundle just below the brake powerbooster. After about 7" this line goes to the first 3-way 'T' connector with an inline adapter going up to 5-32". Hose 2 from the tee goes to connection on the inside of left front fender. Hose 3 from the tee goes to another 3-way fitting where the system gets vacuum ultimatley from a larger hose going to the plenum where the PCV hose attaches. Check ALL these hoses for rot or splits.

Aug 25, 2008 | 1997 GMC Jimmy

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