97 sierra 3500 speedo/shifting problem - Truck Forums


Reply
 
 
 
Thread Tools Search this Thread
  #1  
Old 12-29-2008, 07:18 AM
Thread Starter
 
Join Date: Aug 2007
Posts: 13
Default 97 sierra 3500 speedo/shifting problem

Hello guys
I have a 1997 gmc sierra 3500/454/4l80e. It has started shifting erratically and also has not been indicating speed correctly. torque converter lock up is cycling. I changed trans filter/change fluid. Scanned for codes, no powertrain codes up. I jacked up truck and ran up to speed speedometer still not indicating correctly. I put DVM on transfer casespeed switch and it appeared to read correctly
ac voltage increased with wheel speed about 600 mv@ 45 mph. I have nothing to compare that to,also my manual shows two VSS, one also on transmission but the component I think is it has different color wiring . Anyone know what /where that sensor is? thanks in advance Cort
Reply With Quote
  #2  
Old 01-03-2009, 08:04 PM
Thread Starter
 
Join Date: Aug 2007
Posts: 13
Default RE: 97 sierra 3500 speedo/shifting problem

well I replaced both vss and still no fix. no codes up but still ****ting all over the place and speedo still not right. I am thinking PCM any ideas ...any one. Come on throw something out there thanks cort
Reply With Quote
  #3  
Old 01-03-2009, 08:59 PM
 
Join Date: Dec 2007
Location:
Posts: 214
Default RE: 97 sierra 3500 speedo/shifting problem

try posting in the chevy silverado area, there are more guys that browse over there
Reply With Quote
  #4  
Old 01-06-2009, 02:48 PM
Thread Starter
 
Join Date: Aug 2007
Posts: 13
Default RE: 97 sierra 3500 speedo/shifting problem

thank you !
Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
Speedo/E-brake light/down shifting/crank shaft problems all at once silvercav General Motors Tech 2 03-11-2010 11:08 AM
shifting problems/erratic speedo troc Chevy Silverado/ GMC Sierra Forum 0 01-06-2009 03:27 PM
Shifting problem when low on fuel teri7 Dodge/ Ram 1500 Forum 0 11-25-2007 01:14 AM
1991 sierra 3500 battery problem drhino General Motors Tech 0 05-04-2006 03:24 PM
SPEEDO PROBLEM KOBRA2 Chevy Silverado/ GMC Sierra Forum 2 03-07-2006 10:48 PM


Tags
1997, 3500, 4l80e, 97, erratic, forum, gmc, indicator, problem, problems, shift, shifting, sierra, speedometer, working

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not 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 Off
Pingbacks are Off
Refbacks are Off



All times are GMT -5. The time now is 05:29 PM.