Question about 1999 Chevrolet Blazer

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99 chevy blazer,the speedometer dont work - 1999 Chevrolet Blazer

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  • 189 Answers

Check the front wheel hub assemblys on each wheel tomake sure that the wheel speed sensors are connected to them,and not wore thru somewhere.

Posted on May 02, 2010

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Posted on Jan 02, 2017

  • 172 Answers

SOURCE: needed a jump for 99 blazer. now speedometer has

Speedometer is elect, does odometer still work?, check fuses, if its not prob the speedo circuitboard.

Posted on Aug 29, 2009

terseo
  • 92 Answers

SOURCE: 99 chevy blazer 4x4 vacume diagram

you can buy a chilton or haynes manual at a parts store, or on ebay. Sometimes on ebay they sell the diagrams that are emailed to you in an ebook as well..

Posted on Sep 20, 2009

  • 580 Answers

SOURCE: why wont my 99 chevy blazer temperature warm up?

You may have vapour lock in your heater lines. Start engine, put heat lever on high, disconnect one of the lines on your heater core, the one on the flow out side, & see if you have any air coming out. Once antifreese comes out stick line back on & retighten clamp. Make sure your cooling system is topped off. Also your water pump may not be functionihg to it's maximum. Take rad cap off cold & view flow rate. If inadequate you may have to replace the water pump. Good luck!

Posted on Dec 09, 2009

Z71guy
  • 154 Answers

SOURCE: speedometer stopped working

Pretty common problem with these. Here's a guide to learn how to fix GM instrument clusters yourself, I used it to fix mine and it worked great.How to guide for Trailblazer instrument cluster repair

Posted on Oct 05, 2010

jturcotte
  • 7768 Answers

SOURCE: 2002 chevy s10 blazer 4x4.

Hi, the speed sensor is powered by the PCM via the 10 amp fuse labeled IGN E under the hood. I don't believe your problem is the fuse, as the truck would not likely run if that fuse was bad. The more likely problem is with the speed sensor itself. Sorry I do not have a test procedure for this sensor, so I can't guarantee a new sensor will solve the problem. What you can do is while the truck is jacked up with the drive wheels off the ground (use 2WD), use a voltmeter to back-probe each terminal of the sensor with a voltmeter (put the other probe to chassis ground), and check the voltage with the car running in park versus running in gear. One of the terminals will have a reference voltage and the other the signal. If the signal changes with speed, the sensor is probably working, and the problem would then more likely be the instrument cluster. Let's hope it isn't the cluster, because they are more expensive. A new sensor is just $22 at Autozone. I have pasted instructions below for replacing the sensor. Please let me know if you have questions, and thanks for using FixYa.


Removal & Installation

  1. Raise the vehicle.
  2. Remove the bolts (1, 3) securing the front transaxle brace (2) to the transaxle and right cylinder head.
  3. Remove the electrical connector at the vehicle speed sensor.
  4. Remove the retaining bolt (1) and the sensor (2). Twisting the sensor while pulling outward will aid in removal.

jturcotte_1134.gif


Fig. Removing front transaxle brace (2) after removing bolts (1 and 3)




jturcotte_312.jpg

Fig. Removing vehicle speed sensor (2)



To install:


CAUTION Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.

  1. Install the vehicle speed sensor and the retaining bolt. Install a new O-ring seal on sensor if necessary. Tighten the bolt to 10 Nm (89 inch lbs.).
  2. Install the electrical connector at the sensor. Install the bolts securing the front transaxle brace to the transaxle and right cylinder head.
  3. Lower the vehicle.

jturcotte_1135.gif

Posted on Mar 01, 2011

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I have a 99 blazer 4x4 it is humming in he rear end we had the rear bearings n seals changed new diff cover new fluid and it is still humming what is it??? PLEASE HELP!!!


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Replace the speed sensor on the tailshaft of the transmission. It needs this signal to perform both functions.

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Apr 30, 2010 | 1999 Chevrolet Blazer

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Speedometer stopped working


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Jan 15, 2010 | 2004 Chevrolet Blazer

1 Answer

Why wont my 99 chevy blazer temperature warm up?


You may have vapour lock in your heater lines. Start engine, put heat lever on high, disconnect one of the lines on your heater core, the one on the flow out side, & see if you have any air coming out. Once antifreese comes out stick line back on & retighten clamp. Make sure your cooling system is topped off. Also your water pump may not be functionihg to it's maximum. Take rad cap off cold & view flow rate. If inadequate you may have to replace the water pump. Good luck!

Dec 09, 2009 | 1999 Chevrolet Blazer

1 Answer

99 chevy blazer 4x4 vacume diagram


you can buy a chilton or haynes manual at a parts store, or on ebay. Sometimes on ebay they sell the diagrams that are emailed to you in an ebook as well..

Sep 20, 2009 | 1999 Chevrolet Blazer

1 Answer

Needed a jump for 99 blazer. now speedometer has stopped working.


Speedometer is elect, does odometer still work?, check fuses, if its not prob the speedo circuitboard.

Aug 25, 2009 | Chevrolet Blazer Cars & Trucks

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Digital display cluster


Chevy is known for using a cheap grade of wiring harnesses that corrode over time and short out. my 93 s10 blazer had a bad wire in the transmission harness resulting in only 2nd and 3rd gear and wouldnt shift by itself, i dont know if im right but something to check into.

Aug 08, 2008 | 1993 Chevrolet S-10 Blazer

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