1991 Chevy s10 2.8 5 spd speedometer not working :(

Check the fuses, mine did the same thing, I replaced the fuse in the fuse panel and it works great now.. easy fix

On a 91 S-10 with T5 the speedo is electric so start with the basics. I would crawl under and check the connector at the tranny. Its exposed to muck and grime etc. Check the wire, connector for damage and corrosion. You won't find an adapter on a 91 T5 which will be either a nwc 192 or nwc 201 model. That's only found if the tranny is a pre 89 or 87 which was gear drive so no speedo cable either. The sensor on the tranny itself can be replaced if needed.

Check the fuses as DBCON suggested which is a nice clean thing to do. The rest will involve getting dirty under the truck.

My 1991 S10 w/ the 2.8L will start but to keep it runnign you have to keep the
throtle down and it will die once you let off the throtle. please help me i love my truck and dont want to have to sell it because of some sort of simple fix! please help me

I would say broken or loose speedo cable. 50-70 dollar fix but do not know with out looking

Hey Fellow LoRider ! Im an Ole Skoo Rider From Riverside Cali. ---------------------------------------------------
Any way Without any Detail on your Problem with your 1991 Chevy s10 2.8 5 spd speedometer not working . Gives Me Noda to go on B U T we can Attack this Starting with Technical Service Bulletin I Found that May Apply to your Problem or may Not but must try any & All

9216chevy04
Number: 91-98-8C
Section: 8C
Dates: October 1990

Corporate Bulletin No.: 067104
Subject:
MALFUNCTION OF THE SPEEDOMETER
DRIVE GEAR, DRIVEN GEAR AND/OR SPEEDOMETER

Model and Year:
1987-91 S1 (LLV POST OFFICE VEHICLES)

TO: ALL CHEVROLET DEALERS

Some of the above postal vehicle chassis may experience a malfunction of the speedometer drive gear, driven gear, and/or speedometer adapter.
Effective January 24, 1990 with chassis' VIN 1GBCS10E2M2901183, a new driven gear was installed in production. The new driven gear can be recognized visually as the following table illustrates.
GM PART # COLOR # OF TEETH NEW 3987920 BLUE 20 OLD 3860347 YELLOW 24
IMPORTANT: The new driven gear has eliminated the need for the speedometer adapter.

Recommended service procedures are outlined below:
Service Procedure # 1
1. Remove and discard speedometer adapter (GM Part # 368025).
2. Remove original speedometer driven gear and inspect for damaged teeth. If damaged, follow service procedure # 2. If it is not damaged, replace the (yellow) 24 tooth driven gear with the (blue) 20 tooth driven gear (GM Part # 3987920).

For vehicles repaired under warranty use:
Labor Operation: # T1611
Labor Time: .3 hr.
FAILURE CODE: 92
NOTE: The above procedures do not apply to 1991 Postal Vehicles (LLV) with L38 engines. Effective August 13, 1990 with chassis VIN 1GBCS10A0M2912017, a new engine (L38) and rear axle ratio (GU6) were installed in production. As a result of the axle ratio change, a new driven gear is required. Use (gray) 22 tooth driven gear (GM Part Number 3987922) if vehicle is equipped with L38 and GU6.

Service Procedure # 2
1. Remove and discard speedometer adapter.
2. Remove driveshaft and rear transmission extension housing.
3. Replace both speedometer drive and driven gear with:
Drive Gear (blue) GM Part 96040176 Driven Gear (blue) GM Part 3987920
NOTE: The above procedures do not apply to 1991 Postal Vehicles (LLV) with L38 engines. Effective August 13, 1990 with chassis VIN 1GBCS10A0M2912017, a new engine (L38) and rear axle ratio (GU6) were installed in production. As a result of the axle ratio change, a new driven gear is required. Use (gray) 22 tooth driven gear (GM Part Number 3987922) if vehicle is equipped with L38 and GU6.

Parts are currently available from GMSPO.
WARRANTY INFORMATION
For vehicles repaired under warranty use:
Labor Operation: # T1612
Labor Time: 1.0 hr.
FAILURE CODE: 92

THIS is ONE of a Few Trouble spots I Will Send to you