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2002 Chevrolet Blazer won't accelerate past 30mph

The car was working great till placed in 4 wheel drive low, at the desert. Then when placed back in 2 wheel drive, it won't accelerate past 30mph and the check engine light flashes

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  • 354 Answers

A flashing check engine light means the engine is misfiring. This flashing light will eventually set a code in the low 300's. When you get the code it will tell you which cylinder. If you get a straight 300 it means multiple misfires. Right now if the light is only flashing, check the secondary ignition for loss of integrity. It's more than likely there. I hope this helps.

Posted on Mar 30, 2014

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Posted on Jan 02, 2017

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SOURCE: 4 wheel drive wont swich back to 2 wheel drive

For a temporary fix so the car can drive, remove the fuse for the four wheel drive. it won't actuate the four wheel. The car is always in 2wheel drive. the fuse is located under the hood, the very right side of the of the fuse box, the third fuse up from the bottom. This can be checked in the owners manual. When I need four wheel dr I place the fuse back in. I haven't fixed the problem yet but can drive it 2wheel on the road. think it is the control module for the four wheel dr located under the dash board behind the glove box. Dealer part for $450, I would rather install and remove a 10cent fuse

Posted on Jul 29, 2008

  • 124 Answers

SOURCE: 2002 chevy blazer fuel pump (4 door)

yes you have to drop the tank. you will also need a fuel line tool to unhook the fuel lines. before you drop the tank see if tou can reach and wiggle the electrical connection on the top of the tank. these pumps have a pigtail issue. please rate

Posted on Dec 08, 2008

  • 1 Answer

SOURCE: 1999 chev blazer 4x4 system

I have a 1999 chevy blazer that stuck in 4 wheel drive. How do you get it out.

Posted on Dec 18, 2008

  • 2 Answers

SOURCE: My 98 s10 is stuck in 4 wheel drive low.

Pull the kick panel on the passenger side. there is a small box mounted there that is the computer that controls the actuator for the 4wd system. this is notorious for problems due in fact that the connector likes to pull out and away from the module. I had the same problem and the solution is simple.. take a long zip tie and get it between a few of the wires and around the module. tie it in and have a nice day.. it wont come off or try to pop out anymore and you should have no issues getting into 2wd, 4wd h, 4wd L.


Posted on Jun 21, 2009

  • 303 Answers

SOURCE: Noise in front end 2002 zr2 blazer

Two things maybe your problem:1 .Front axle actuator to engage 4wd is not releasing. 2. Front axle u-joint needs replacing. Lift car on jacks with front end off ground. Then spin tires by hand as fast as you can and see if you hear the noise and where it is coming from ( spin in both directions).

Posted on Feb 05, 2010

Testimonial: "Thank you! It was the actuator that was causing the problem."

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I have a 2002 blazer 4.3 4X4 288,000 + miles automatic transmission was replaced at 204,000. this winter when i needed 4 wheel drive I had to go into 4 low first then switch to 4 high so I could drive to...


Sounds some what like a transfer case problem. Call up some tranny shops or the one u went to and see if they would do a free diagnostic just to be sure.

May 05, 2011 | Chevrolet Blazer Cars & Trucks

1 Answer

My 4 wheel drive will not ingage into 4 wheel high, only 4 wheel low. I have replaced the dash switches and the thing on the transfer case . what else can I do ?


If you can't get 4 high, then you can't get 4 low either. You can get the transfer case to go into 4 low, but unless the front axle is engaged, you will still be in 2 wheel drive. There is a vacuum switch that engages the right front wheel. The left wheel is engaged full time. On earlier models, this vacuum switch is located unerneath the battery tray. It is prone to become disconnected from the vacuum line. Check this and all other vacuum lines that are connected to the 4wd system. The way I test my 4wd Jimmy is to find a dirt or gravel road or parking lot and accelerate hard from a standing start in both 4hi and 4lo. If 4wd is not engaged your back wheels will spin.

Dec 16, 2010 | 2003 Chevrolet Blazer

1 Answer

1991 S-10 Blazer 4x4 4.3


you need to pull the switch out of the dash and look behind the swict hfor the actuator, chances are the stud that touchs the actual relay is broken use a pen or something slender and long to push it to the desiref position, other than thats go to a junk yard and look for that switch, should just pop out with a lil prying..

May 19, 2009 | 1986 Chevrolet S-10 Blazer

3 Answers

My truck is stuck in 4 lo


pull atc 25 amp fuse in underhood fuse center and 10 amp 4wd fuse inside cars fuse box,your problem is in control box behind kick panel on pass. side ,corrosion build up,

Mar 06, 2009 | 2000 Chevrolet Blazer

1 Answer

4 wheel drive not working


Vacume lines or vacume switch on transfer case,or vacume pod to front axle.

Jan 05, 2009 | 1993 Chevrolet S-10 Blazer

1 Answer

1993 4X4 BLASER 4WHEEL DRIVE


Your blazer is equipped with a shift on the fly four wheel drive. That means that at speeds less than fifteen miles per hour you can shift into or out of four wheel drive by simply pushing the four wheel high button. If you wish to shift into four wheel low. Stop, put the transmission into park or neutral, and push the four wheel low button. Same procedure for shifting back out. Never shift into or out of four wheel low while moving. And be careful in four wheel low. At full throttle your still barely moving, you don't want to blow your engine up!

Dec 31, 2008 | 1994 Chevrolet S-10 Blazer

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