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

299,705

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.

48,555

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.

1 people found this helpful.

Your Answer:

GMC Jimmy Experts

  • #1
    tennisshoes
    Reputation
    330
  • #1
    Andrew Olsen
    Reputation
    330
  • #3
    1oldman
    Reputation
    280
View All

Related Models For Sale

Used Chevrolet Blazer
735 listings starting at $900
Used GMC Sierra 1500
816 Great Deals out of 60,745 listings starting at $1,495
Used GMC Yukon
333 Great Deals out of 22,560 listings starting at $2,900
Used GMC Envoy
44 Great Deals out of 1,599 listings starting at $1,990
Used Chevrolet S-10
4 Great Deals out of 899 listings starting at $995
Used Jeep Wrangler
204 Great Deals out of 15,160 listings starting at $3,000
Used Chevrolet Silverado 1500
1,869 Great Deals out of 159,082 listings starting at $1,200
Used Chevrolet Tahoe
675 Great Deals out of 38,596 listings starting at $995
Used Ford F-150
2,398 Great Deals out of 200,117 listings starting at $1,300
Used Jeep Grand Cherokee
1,162 Great Deals out of 73,779 listings starting at $1,000

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use.