Transmission? Electrical? Help!


Asked by Oct 07, 2012 at 01:01 AM about the 2000 Chevrolet Blazer LT 4-Door 4WD

Question type: Maintenance & Repair

OK, so I was having this problem with my
tranny. 1st and 2nd shifted fine, then at
around 20-30 MPH(2000 rpms) the rpms
would drop to 600, go back up to 2k, back
down, back up, back down, back up, then
shift in to third. Eventually, it stopped, but
would no longer shift past 2nd gear. I took it
to a shop, they rebuilt it, but I'm still having
the problem. It does the same thing, but
does it 4 times now before shifting to 3rd.
The only code that's come up is for my 4WD
relay being bad, but it was doing it before I
had replaced the TCCM with the current one
that has the relay problem(old TCCM had a
broken/corroded pin that wouldn't allow
meinto 4WD). Any ideas as to what could
cause this so I can take it back to the shop
with some ideas?

6 Answers


camshaft position sensor


Seems like a shift solenoid problem, these transmissions have electrical shift solenoids. There are 2. If solenoid A fails then you have no 1st or 4th gear. If B fails then you lose 2nd and 3rd. Sounds like B is going out. I had one where A failed and before i completly lost 1st and 4th if started with hard shifts, then would fluctuate back and forth from 1st to 2nd. See if solemoids were included in the trans rebuild

2 of 2 people found this helpful.

Yes, they replaced the solenoids saying both were fried when I bright it in. When I brought it in, it wouldn't shift into third, but first and second worked just fine and shifted in/out just fine. I'm bringing it back to them tomorrow, so hopefully they can figure it.

1 of 1 people found this helpful.

I figured it out. It was the TCCM. I disconnected the fuse and it started driving fine. The shop verified this asit kept trying to engage 4wd. Thanks for the suggestions though. They ultimately helped me find the problem.

2 of 2 people found this helpful.

My transmission is getting sticking in first gear

5 of 5 people found this helpful.

I have 97 blazer no power wont go into to neutral even with key turned what could this be

Your Answer


Looking for a Used Blazer in your area?

CarGurus has 731 nationwide Blazer listings starting at $900.


Chevrolet Blazer Experts

  • #1
    Andrew Olsen
  • #2
  • #3
View All

Related Models For Sale

Used Chevrolet Tahoe
590 Great Deals out of 37,467 listings starting at $1,699
Used Chevrolet S-10
8 Great Deals out of 995 listings starting at $999
Used Chevrolet Silverado 1500
2,175 Great Deals out of 151,474 listings starting at $1,995
Used GMC Jimmy
153 listings
Used Ford F-150
2,521 Great Deals out of 220,358 listings starting at $1,222
Used Ford Explorer
847 Great Deals out of 64,621 listings starting at $2,000
Used Chevrolet C/K 1500
731 listings starting at $2,995
Used Chevrolet Camaro
236 Great Deals out of 30,155 listings starting at $4,980
Used Jeep Grand Cherokee
843 Great Deals out of 74,143 listings starting at $500
Used GMC Yukon
375 Great Deals out of 19,007 listings starting at $2,500
Used Chevrolet Suburban
421 Great Deals out of 22,354 listings starting at $2,495

Used Cars For Sale

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use.