Question about 1999 Chevrolet Blazer

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Wich is the best performance chip to mount in my 99 blazer lt

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Go to the web site below, they are the best by far.
http://www.hypertech.com/

Posted on Jun 26, 2009

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I need a color code for the brake light wiring diagram for a 2000 s10 blazer


The S10 and the Blazer are identified as two different vehicles. The left stop light wire is YEL; the right is DK GRN. The center high mount stop lamp wire is LT BLU.

Oct 30, 2016 | 2000 Chevrolet Blazer

1 Answer

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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Sep 30, 2015 | Cars & Trucks

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99 blazer security light stays on


The security light means the computer is not reading the chip in the key.
You should have a sensor in the key lock and a chip on the key programmed for the security system.
I would try a spare key first. If you don't have one, you can get one from the dealer or some locksmiths.
If you know you have a good key, the problem may be with the sensor in the lock cylinder.

Jul 23, 2012 | 1999 Chevrolet Blazer

1 Answer

Where is the overdrive is located on the 1999 blazer


I had a 99 S-10 it didnt have overdrive. It had 1st 2nd 3rd and Drive. Drive is the 4th gear wich is equivilent to an overdrive in other makes.

Jan 17, 2011 | 1999 Chevrolet Blazer

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'99 chevy blazer 4x4 LT


the heater issue is probaly a short in wiring. the tire is a wheel bearing needing replaced.

Apr 06, 2010 | 1999 Chevrolet Blazer

1 Answer

I´AM THINKING ABOUT GETTING A PERFORMANCE CHIP FOR MY 2005 350 SUPER DUTY FORD 6 LT DIESEL ENGINE WHAT IS YOUR ADVICE


Do your research. Don't rely on one manufacturer's claims. Diesel's work on precision. Any time you change something in a diesel engine it affects everything else, for example, shoving more fuel through the injectors can push them beyond the built in tolerances and lead to premature wear. One of the best authorities on diesel performance is Banks. They have been at it for a long time, GM recognized them as such in the early 80's. Trust what they tell you.If they don't offer that type of chip or performance chances are there is a reason.Hope this helps.

Oct 28, 2009 | 2005 Ford F 350 Super Duty

3 Answers

No Heat! 1999 chevy blzr lt 4.3 radiator full, blower works,


Your '99 Blazer does not have a water valve. Just a temp. blend door. In other words, hot water should be flowing through the core at all times. Like the other techs said, make sure you are getting the whole system full of coolant. You might even try disconnecting one hose, and pouring water into the heater core itself. On most of these year models, if you listen, you can hear the rush of water through the core when you lightly rev the eng. I have replaced 3 heater cores just last year on '96-'99 Blazers. They clog easily. YOu can blow or flow water through them, but if they don't flow freely, I mean without any restriction whatsoever, they will not get as hot as you want. The thing is tiny!

Here's an easy test: Run engine until temp gauge reaches normal: around 180-200 degrees. Reach back to the firewall and grab both heater core hoses. Are they both about the same temp. and HOT? THey should be. If one is much warmer than the other. You are clogged enough to suffer in the winter. And from what you said: "Brrrrrr" You are getting poor performance out of your heater.

BE sure to check that the blend door is working. Is it cool when you set temp to cool? Blazers go through way more heater cores than they do blend doors, so I'm betting your core is either empty, or clogged. TaterTodd

Jan 25, 2009 | 1999 Chevrolet Blazer

1 Answer

Cant find the iat sensor on 91 s10


The IAT or MAT sensor (as equipped), is a thermistor (resistor which changes value based on temperature) mounted either in the air intake snorkel or the manifold (depending on the application).

Dec 25, 2008 | 1994 Chevrolet S-10 Blazer

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