Question about 2002 Chevrolet TrailBlazer

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I turnthe key and vehicle won't start.Tach gauge goes all nutty and there is like a gear sound coming from the dash.What could be the problem?

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  • 71 Answers

Clean you battery teminals and cable ends. Sounds like you're not making good contact.

Posted on Oct 22, 2013

6 Suggested Answers

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Posted on Jan 02, 2017

tommyboinow
  • 324 Answers

SOURCE: tachometer gauge

your relay is going bad, replace it.

Posted on Nov 26, 2008

  • 188 Answers

SOURCE: no tach reading, stuck in third

sounds like a relay to me. but you can get oil for gear box that frees berrings.

Posted on Mar 25, 2009

  • 41 Answers

SOURCE: The tach and speedometer in my 95 Cheyenne work

Sounds light trans module on side of transmission to me it controls speed rpms and gear selection

Posted on Apr 26, 2009

  • 2 Answers

SOURCE: when i turn the key I get no dash lights, 97 blazer

I had the same exact thing happen to me, I have a 97 blazer and after hours of screwing around with it and several different options... it turned out to simply be the ignition switch.

Posted on Feb 10, 2010

Testimonial: "Cheers really appreciated that the second opinion was very helpful, mine also just turned out to be just the ignition switch. SO what will be next ???"

  • 12 Answers

SOURCE: 94 chevy k 1500 dash cluster has no tach. Will a

If it plugs in, it will work. In fact the wiring may already be there for the tach as many are.

Posted on Mar 03, 2011

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1 Answer

On my 2002 Trailblazer, when I start the engine, all my dash warning lights on and gauges stop working, the speedo and tach still work.


There is a known problem with the ignition starter switch that causes this, this is the switch that the ignition key operates when you turn it.

Sep 25, 2016 | 2002 Chevrolet TrailBlazer

1 Answer

95 bmw 525i no dash lights no tach no tremp gauge and fuel gauge pegged way past full


Why was the battery missing to begin with? I would start by checking all fuses under dash and Central hub. Check for burned in-line fuses,if any, coming off of battery cables.

Jan 16, 2014 | Cars & Trucks

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2004 Ford Taurus, Tach and fuel gauge going crazy


Ford 150 Van No Start No Crank Same problem aftermarket remote start problem !
Watch the second part too . Do you know what a wiring diagram is ? Look under dash or the hood an see where the remote start is hooked up , what wires ! You can find a wiring diagram here at http://www.bbbind.com/free_tsb.html Enter the vehicle info. year , make , model an engine size . Under system click on engine , then under subsystem click on starting . Click the search button , then on blue link . You'll see all the componets in the starter circuit .

Apr 11, 2017 | 2004 Ford Taurus

1 Answer

The mountaineer won't start. When i turn on the headlights the lights on the dash board goes dim and the gauges be moving fast.


Sounds like you have a low voltage problem.Take a volt meter and battery voltage first it should be 12-12.7 volts not running and key off.Then start engine and check the voltage coming out of the alternator it should be 13-14.7 volts.If one of these are not within these specs then replace which everone that is bad.

Aug 10, 2011 | 2005 Mercury Mountaineer

1 Answer

89 VETTE. ALL GAUGES IN DASH NOT WORKING . THE DASH LIGHTS DO WORK . RADIO HAS NO SOUND . INTENA DOES GO UP AND DOWN . SPEDO GAUGE NOT WORKING , FUEL GAUGE NOT WORKING , TACK NOT ...


Do you know that all this stuff was working when it was parked? Lets assume it was. Most of this stuff works with the key on or in the acc. position. You are going to need something to check for voltage. At least a test light better yet, multimeter. The dash lights however, come off the headlight switch. Start by checking for power at the fuse for the gauges it's marked "inst" for instruments it protects all the gauges including the tach and speedo. With the key on you should have power on both sides of the fuse. The antenna won't come up until you get the radio to come on. If you have power at the fuse, Your going to have to start taking the dash apart to see where the "open" in the circuit. If you have no power at the fuse, it comes from the ignition switch, it's down low on the steering column. ( I hope you're skinny)

As for the brakes, since it's been sitting that long I would be pulling the wheels off and looking for a seized caliper.

If your going to do your on work on this car I recommend investing in a good manual, try to find a factory book on ebay. or Craig's list.

This is a way cool car, have fun with it!!!

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2 Answers

97 Jeep Wrangler Dash Gauges Arent Operating..everything else ok!


ck the engine to body ground.located back side of engine and srew to firewall.

Jun 01, 2009 | 1997 Jeep Wrangler

2 Answers

Temp gauge stay on cold.


Switch ig. on, ground the sender unit wire for about 3 seconds see if the temp. gauge moves, if so change sender unit, if not then it is a faulty gauge reader.

Jan 15, 2009 | 2001 Chevrolet Impala

1 Answer

Problems on dash of car?


This a wild guess but it sure sounds like maybe the dash has come ungrounded somehow. Many dash instruments share a common ground to the frame of the car and all kinds of crazy things can happen if the connection goes bad. I have also seen a dash go nutty like that if the car's engine computer crashes. Turning off the car and back on "reboots" it.

Jan 14, 2009 | 2001 Chevrolet Malibu

3 Answers

No tach reading, stuck in third


sounds like a relay to me. but you can get oil for gear box that frees berrings.

Oct 31, 2008 | 1995 Chevrolet Tahoe

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