Last post on Oct 25, 2013 at 7:32 AM
You are in the Chevrolet Blazer
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Chevrolet Blazer, Transmission, SUV
#335 of 384 Re: 97 Blazer transmission problem [slickfitz]
Jun 11, 2010 (3:04 pm)
The problem is caused by worn contacts in the electrical part of the key switch. There are several contacts in it and one of them provides power to the transmission, which has several electronic controls and also solenoids on the valve body. The transmission does really strange things when the power is intermittent or not there, including not going into 1st and 3rd gear, shifting really hard, and more.
There is a small solenoid on the mechaical part of the key switch that prevents the key from being removed when not in the unlocked position. If it does not get power, it prevents the key from being removed in any position.
I've had the exact same problems you have and more, and all of them went away immediately when I replaced the electrical part of the key switch. The cable to the switch is captive on the switch unit, and connects to the harness at the lower end of the steering column.
You have to remove the lower part of the dash and the plastic housing from around the upper end of the steering column where the switch is. To remove the switch itself, you need s really small star screwdriver or a small flat-bladed screwdriver that will fit in the star-head screws and turn them.
The switch costs from $80 to $110 depending on where you get it.
#336 of 384 Re: 97 Blazer transmission problem [dgcaller]
Feb 19, 2011 (7:15 pm)
I had all the same symptoms with the slow start and no first or fourth gear. The key wouldn't come out of the ignition so I knew when I read this I found my solution. This is my second one so taking it out was a breeze and orielly has a lifetime warranty, this time it was free. The first time the blazer would die while driving and stall out at lights. The last one lasted two years and since they pack so much control into one switch this model seems to chew them up. Thanks for the diagnosis, I fixed it on the first try!
Mar 23, 2011 (7:08 am)
how long is the trans dip stick in a 1998 chevy blazer 3.1 v6 4wd?
#338 of 384 Re: 97 Blazer transmission problem [slickfitz]
Apr 02, 2011 (12:19 pm)
I have a 97 blazer i put a new motor in it when i got it running the trans would shift hard i plugged it into the computer because the check engine light was on it was the throttle position sensor changed it and the trans shifted properly as soon as that was done , hope this helps.
#339 of 384 Re: ?????help [hilljay]
Apr 16, 2011 (12:56 pm)
3.1 L in a 98? Do you really have a 60 degree 3.1L that looks like a short, small SBC 350? Because if you do, it must not be stock. That would make it difficult to answer your question.
#340 of 384 Re: 97 Blazer transmission problem [joesgarage]
May 28, 2011 (1:18 am)
i had that problem got it fixed now 3 gear its wont catch and just wines out. everything else works awesome. is it the tranny or can it be fixed someone let me know thanks
#341 of 384 97 Blazer Transmission
Sep 08, 2011 (2:34 pm)
I have a 97 Chevy Blazer that has ran pretty good for the most part. The transmission has been fault free since I've owned it. The other day, I was in cruise control at 75 mph, and just like someone flipped a switch, there was no 3rd or 4th gear. Also the speedo crashed to 0 as soon as it happened. After I got pulled off the road, I ran it through the gears. It engaged perfectly into 1st and reverse. It didn't want to shift into 2nd very well, and 3rd and overdrive were not an option. After a few hours of sitting, I decided to try it again on a cool motor and transmission. Sure enough, everything worked like normal. Transmission fluid was fine (didn't smell burnt and levels were good). Could this be some kind of solenoid issue? Cost?
#342 of 384 97 Chevy S-10 Blazer Tranny Issue
Sep 16, 2011 (3:15 pm)
The vehicle shifts through the gears normally, but will not shift into the higher gears. Does not shift into the passing gear when you give it gas. It also acts like it is restricted. What could be the problem(s)?
#343 of 384 Re: 97 Blazer Transmission [tony_7991]
Sep 16, 2011 (11:56 pm)
The problem is not likely in the transmission but in the key switch, even if you get DTCs that indicate the solenoids. The transmission is electronically controlled. If the voltages to the solenoids are low or power is interrupted, the transmission exhibits all kinds of shift problems. The power to the solenoids is routed through the key switch, which has 6 contacts in it. If the contacts are dirty or worn, the voltage to the tranny is low and the solenoids do not work. My trans had some similar symptoms and when I replaced the key switch, they all went away instantly.
#344 of 384 Re: 97 Blazer Transmission [dgcaller]
Sep 18, 2011 (2:51 am)
This key switch that you are talking about where is it located at on the vehicle?