my 99 gmc jimmy seems to have lost overdrive. the tach revs but the speedometer doesnt move. it will go into reverse.

Asked by Mar 04, 2015 at 10:46 AM about the 1999 GMC Jimmy 4 Dr SLE 4WD SUV

Question type: General

2 Answers

228,515

I always check my fluid first, is it burnt, low? If all is fine, you might have burned up the O/D band. Only way to know is have it diagosed by your mechanic or trans expert.

36,705

You may also have a bad VSS (Vehicle Speed Sensor). If CEL is on, see if it will give you a code. The VSS or Variable Speed Sensor, is an Electrical pulse sensor that sends a signal to the DRAC (Digital Ratio Adapter Control) informing it of the vehicals speed. From there signals are sent to the Power Train Control Module, and to the Cruise Control. If your Speedometer is not working, 99% of the time its caused by a defective VSS. On 2WD models, the VSS is located on the tailshaft of the Transmission, drivers side. On 4WD models, the VSS is located on the tailshaft of the Transfer Case, drivers side. You will need a 1" socket to remove the sensor.

Your Answer

Add photo

Related Questions

  • 99 gmc jimmy 4 answers

    So my car began to smoke and the check battery light went on and my car will start but not move. What could be the cause

    1999 GMC Jimmy

    -

    Maintenance & Repair

  • Jimmy goes forward but wont go go into reverse 1 answer

    I recently bought a 1998 GMC Jimmy. I bought it knowing it didn't go into reverse. I need help finding out whats wrong with it.

    1998 GMC Jimmy

    -

    Maintenance & Repair

  • 1998 gmc jimmy 8 answers

    why does my jimmy start and shut off after about 3 seconds?Had jimmy running fine but the starter give out i put another one on but wouldnt start.accendently took out security bypass for the remote ...

    1998 GMC Jimmy 4 Dr SLT 4WD SUV

    -

    Maintenance & Repair

  • My 1999 jimmy 4x4 4.3 l tries to accelerate on it's own 1 answer

    My Jimmy tries to accelerate if you are driving and try to stop for a light, etc, the Jimmy will slow down eventually, but the engine revs up and if you paying it take off on you. It also happen...

    1999 GMC Jimmy 4 Dr SLT 4WD SUV

    -

    Maintenance & Repair

  • My 1997 GMC Sierra 1500 is not shifting right 1 answer

    I got in my truck this morning to leave for work and put it in reverse to back out of my driveway and just sat there and revved up I've tried putting in drive and it seem like you want to catch bu...

    1997 GMC Sierra 1500 K1500 SLE 4WD Extended Cab SB

    -

    General

Search GMC Jimmy Questions

GMC Jimmy Experts

#1 Andrew Olsen
Andrew Olsen
Reputation 280
#2 tennisshoes
tennisshoes
Reputation 240
#3 1oldman
1oldman
Reputation 220
View All

Related Models For Sale

Used Chevrolet Blazer
1,125 listings starting at $1,995
Used GMC Sierra 1500
879 Great Deals out of 64,789 listings starting at $1,500
Used GMC Yukon
401 Great Deals out of 16,382 listings starting at $1,800
Used Chevrolet S-10
6 Great Deals out of 1,428 listings starting at $1,995
Used Chevrolet Silverado 1500
2,013 Great Deals out of 160,759 listings starting at $1,995
Used GMC Envoy
55 Great Deals out of 2,023 listings starting at $1,999
Used Ford F-150
2,426 Great Deals out of 211,450 listings starting at $895
Used Jeep Grand Cherokee
806 Great Deals out of 70,394 listings starting at $995
Used Chevrolet Tahoe
629 Great Deals out of 27,855 listings starting at $600
Used Toyota 4Runner
291 Great Deals out of 20,775 listings starting at $2,700
Used Jeep Wrangler
291 Great Deals out of 19,181 listings starting at $3,295
Used GMC Sonoma
4 Great Deals out of 471 listings starting at $2,700