Question about 1991 Chevrolet C1500

1 Answer

1991 chevy pickup not shifting

My 1991 chevy pickup with automatic tranny is not shifting into 3rd gear. Fo a while it helped to turn the ignition off and restart but now that does not always work. Does this system use a vacuum modulator or would this be a TCM problem? Where is TCM located? Thanks in advance for any help. Chuck

Posted by on

Ad

1 Answer

  • Level 2:

    An expert who has achieved level 2 by getting 100 points

    MVP:

    An expert that got 5 achievements.

    Scholar:

    An expert who has written 20 answers of more than 400 characters.

    New Friend:

    An expert that has 1 follower.

  • Expert
  • 91 Answers

1991 chevy pickup not shifting - b85f3b28-0a87-431e-bab0-3cb80e429a6c.jpgT.C.M. MODULE & WIRING HARNESS. GMC. $ 147.49 Chevrolet C1500 2WD PICKUP, 1991, 1992, 1993. Chevrolet ,you can see clearly what you need!
Watch out because not necessarily is the TCM,If you put more details may be we are able to help you out!

Posted on May 29, 2013

  • chuck humble May 29, 2013

    sometimes like usually when I first start it up it will work fine for a while. If it shifts into 3rd or 4th it will stay there until I stop or slow down then it will stay in 2nd. When it is acting this way, moving the shift lever won't shift the tranny in or out of 1st or second gear. sometimes when it does finally shift it is at a higher rpm and it shifts hard, never slips. Sometimes when its acting up I will stop the truck and turn off the ignition, when I start it back up it will work for awhile.

  • Wesley Nov 26, 2019

    Mine is doing the exact same thing

×

Ad

5 Suggested Answers

lovelle40

mac mcknight

  • 26 Answers

SOURCE: ''88 chevy K2500 won't shift past 2nd gear

Tha vacuum modulator will not keep the truck from shifting,it only helps with sift quallity.it sound like you have some internal problems and will need to take it to a transmission shop

Posted on Jan 02, 2009

Ad

Anonymous

  • 2 Answers

SOURCE: 88 s10 pickup truck will not shift from 3rd gear to overdrive

need more info i had a 1984 chevy half ton and first, second, and third worked fine but lock up didnt work. the problem was there was no vacum at a switch under the hood on the fire wall also your shift linkage could be out of adjustment. try driving down the road and raise up a little on the shifter.

Posted on Jan 25, 2009

Bruce Hathcock

  • 3600 Answers

SOURCE: c6 Transmission wont shift into 3rd gear

The shift shaft has stuck. The modulater shifts threw all gears so if you pull the hose off and there is no fluid leak then the modulater valve may be good. You could try turning the adjusting screw inside the vachumm hose and if that does not work pull the oil pand and lube all the shift solinoids they may have rusted fron condensation. Use a screw driver to get it to move the shift levers and buy some lucas trasmisson oil and run it in there it will soften the seals. Hope this helps.

Posted on Jul 09, 2009

BB1BUD

  • 462 Answers

SOURCE: transmission wont shift to second

DON'T KNOW WHAT YEAR YOU HAVE BUT THE TRANSMISSION MODULE NEEDS TO BE PROGRAMMED TO WORK PROPERLY.

Posted on Jul 12, 2009

MNfisherman

Nate Stansfield

  • 11896 Answers

SOURCE: my 88 2500 k pickup not shifting into 3rd or 4th

common problem. It will need rebuild or replacement. They are common tranny's do due this, there are many out there and reasonably priced.

Posted on Oct 06, 2009

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

My 1991 Ford e350 automatic transmission won't shift into gear


Check the emc on the tranny. Ford and chevy have a problem with the location of where the tranny ecm is located. It it located where water soaks it. Also, check the tranny fluid, if it out it won't shift into gear.

Nov 03, 2015 | Ford Cars & Trucks

1 Answer

I only have 2nd and 3rd gear in my 1991 honda accord lx


Sounds to me like the shift solenoids on the transmission are bad or need to be cleaned up. They are located on the outside of the transmission case, on the front, straight below where the distributor is. They are in pairs and bolted to the tranny by two or three #10 bolts. There are two pairs on the tranny.You can try cleaning the screens on them or worst case, you may have to replace them to get the tranny to shift normally again.

Jan 03, 2013 | 1991 Honda Accord

1 Answer

1993 Chevy Silverado will not shift in to 2nd 3rd or Overdrive.


Are you sure its stuck in first gear, Its probably in second.. It sounds like a stuck or open shift solenoid in the tranny (4L60E hydra-matic). Depending on the year and type of tranny this was a default setting to either only second or only third gear, should some electrical or transmission hydraulic fault occur. Another common problem for that year is a faulty ignition switch at the key cylinder. It will fail and not send power to the tranny (thus not powering up the shift solenoids). The default (or limp home mode) is when both solenoids are commanded off. They will be both commanded off in second gear (even when the tranny is operating normally).

Jan 30, 2011 | 1999 Chevrolet Silverado 1500

1 Answer

Hesitation or slight bucking when shifting from 2nd-3rd.


Why are you shifting from 2nd to 3rd gear ? is this a standard or automatic? If its a automatic its normal for the torque converter to catch up with the speeds of the tranny. To save the life of your tranny try to let the tranny do the work by itself and don't shift unless in adverse weather conditions.

Jan 14, 2011 | 1998 Mercury Mystique

1 Answer

1975 chevy blazer with a hydro-matic 350 automatic


check your kick down cable attached to the carb, it may be out of adjustment and forcing the trans to stay in "passing gear"

May 28, 2010 | Chevrolet Blazer Cars & Trucks

1 Answer

My 88 2500 k pickup not shifting into 3rd or 4th


common problem. It will need rebuild or replacement. They are common tranny's do due this, there are many out there and reasonably priced.

Oct 06, 2009 | 1988 Chevrolet C2500

1 Answer

Transmission shifting problem


You need to get a hold of your local Chevy dealer. There was a bullitin on slide shifting on these years. There is a wire that has to be jumped on the computer to solve this problem. Hopefully it hasn't already ruined the transmission

Sep 28, 2009 | 1999 Chevrolet Blazer

1 Answer

1988 Chevy shifts late


Only if its a 3 spd tranny. If O/D then check tv cable on carb. If good you can check gov also. Whats fluid look/ smell like?

Jul 21, 2009 | 1999 Chevrolet Silverado 1500

2 Answers

It's an automatic but it won't shift from 2nd to 3rd.


I would have to say it is the tranny check the fluid make sure it is clean and at the correct level

Apr 16, 2009 | 2003 Chevrolet Silverado 1500

Not finding what you are looking for?
1991 Chevrolet C1500 Logo

2,275 people viewed this question

Ask a Question

Usually answered in minutes!

Top Chevrolet Experts

Marvin
Marvin

Level 3 Expert

85223 Answers

Jonah Oneal

Level 3 Expert

14092 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22485 Answers

Are you a Chevrolet Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...