Last post on May 10, 2013 at 1:58 PM
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Chevrolet Blazer, GMC Jimmy, SUV
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#3658 of 3674 Re: 99 Blazer 4x4 4.3 L poss. transmission problem? [miss_jessica]
by Mr_Shiftright HOST
Jan 02, 2012 (3:57 pm)
NO! Don't get a "flush" but you could certainly opt for a transmission fluid drop, with a new filter. This is also a good time to examine the old fluid for signs of metal debris. Also, don't use additives. Do the fluid change and see how it goes from there. This is an old transmission so don't do anything drastic to it.
#3659 of 3674 Re: 99 Blazer 4x4 4.3 L poss. transmission problem? [miss_jessica]
Jan 04, 2012 (10:49 am)
I agree with Mr. Shiftright, a flush is only good for the shop doing it, not for the transmission.
This kind of hard shifting is almost always due to the line pressure in the transmission being too high. There are several possible causes. The PCM computer is supposed to regulate the pressure based on the driving conditions. For example, more pressure for high RPM shifts, less pressure for slow speed shifts. so it could be a computer issue or a pressure regulator valve issue, or something else.
I think your first step should be to take it to a local (not chain) transmission shop for a filter and fluid change. Ask them to read the codes associated with the trans. Then you will have some knowledge of what to do next.
The design life of these transmissions is 70,000 miles, to last through the 50,000 mile warranty period and then a little more, so be prepared since you are already into the third life.
#3660 of 3674 Re: 4 WHEEL DRIVE LIGHTS BLINK WHEN I PUSH THEM [smileyfedex]
Feb 12, 2012 (9:01 am)
I have had the same problem!! It's not the computer or the push-button 4x4, it's the 4x4 "Diaphragm" "Accuator" for the 4x4 under the "Battery" Plate. Remove the "Battery" then remove the "Battery" "Plate", under it is a round rubber "Diaphragm" that has a really thin rubber outside. Sometimes Salt, Battery Acid, or Weathering can cause this part to crack and loose it's suction. (And sometimes it could just be the vacuum hose connected to the bottom of the Diaphragm has popped off.) If thats the case just put the hose back on and put a tie wrap around it. Or the metal clip that holds the 4x4 cable to the "Diaphragm" has rusted and needs to be replaced. It's very easy to do and a new "Diaphragm" isn't alot of money. I hope this helps!!!
#3661 of 3674 Re: 1994 blazer HELP!!!!!!! [robmonahan]
Mar 06, 2012 (12:52 pm)
I know this is a little late on a possible answer, but this may help. First off the advice to wiggle wires with an ammeter in line won't really help much since the fuse blows and you don't get an indication. Since you are blowing the ignition/gauges fuse it IS a primary wire. A primary wire is a large gauge wire, usually red. Do this at night since blowing this type of fuse will cause the problem wire to flash where it is rubbing. Use an old fiberglass fishing rod or a dowel and push the wires around under the hood with the ignition on but without the engine running. Hopefully you will find the offending wire rubbing on some assembly where you may not have to tease the wire out of a bundle going through the fire wall.
#3662 of 3674 Re: Fuse & Electrical Prblems - UPDATE!! [leoandme]
Mar 25, 2012 (11:56 am)
OMG!!! Wish we would have found this article a month and $$'s earlier. My husband was having the same exact issues with his 96 Jimmy. I told him about your aritcle and the solution. He went out unplugged the plug and presto everything works and no more blown fuses!! Thank you for all the help this has given us!!!!!
#3663 of 3674 Re: 2001 chevy Blazer brake pedal [rgraham2]
May 08, 2012 (10:32 am)
Did you find a solution to this problem? My 2001 blazer is doing exactly the same thing, except the right blinker doesn't work either.
#3664 of 3674 Re: 2001 chevy Blazer brake pedal [rgraham2]
May 08, 2012 (11:36 am)
I had the same thing on my 2000 Jimmy. It turned out to be the multifunction switch on the steering column. It's the one that has the turn signal, cruise control, emergency flashers and high beam switches. It developed an internal short that not only caused the power to remain on, but also turned on the brake lights constantly. The switch is readily available but replacement is not so easy. Good luck.
#3665 of 3674 Re: 2001 chevy Blazer brake pedal [fixitman]
May 08, 2012 (12:53 pm)
Thank you. We will try that.
#3667 of 3674 Re: 2001 chevy Blazer brake pedal [fixitman]
May 11, 2012 (12:19 pm)
OK, the multifunction switch has fixed the problems. They do tell me that the right blinker is blinking too fast (this is the one that didn't work at all prior to the multifunction switch replacement). Thank you again for your help.