Chevy Trailblazer Issue

Asked by Mar 11, 2016 at 08:23 PM about the 2003 Chevrolet TrailBlazer LT 4WD

Question type: Maintenance & Repair

Hi.. I have a 2003 Chevy Trailblazer LT and my rpm
is going crazy whenever I turn on the heat whether
it's full blast or just on setting 1. When it's not on it
doesn't do it. I just had my throttle body replaced
because the one I had on it was no good and I got it
from Chuck and Eddies. Any reason why it would
be doing that?

2 Answers

65,645

There is a ground wire not hooked up or bad,more than likely at heater switch,or dash board,should have nothing to do with throttle body replacement unless your engine is reving up and down all so.

The rpm actually only goes crazy when the defroster is on, just discovered this morning.

Your Answer

Add photo

Related Questions

  • Chevy Trailblazer Issue 2 answers

    Hi.. I have a 2003 Chevy Trailblazer LT and my rpm is going crazy whenever I turn on the heat whether it's full blast or just on setting 1. When it's not on it doesn't do it. I just had my throttle...

    2003 Chevrolet TrailBlazer LT 4WD

    -

    Maintenance & Repair

  • trailblazer transmission issue 1 answer

    Hi, I drive a 2003 trailblazer, 172 k miles on it, it has shifted hard from 3rd to 4th for a while now, not to bad though. Now, while in 4th, approx 60 mph the trans. seems like it isn't sure what ...

    2003 Chevrolet TrailBlazer LTZ

    -

    Maintenance & Repair

  • Chevy trailblazer 1 answer

    My trailblazer is driving fine one minute then about to stall out the next. It takes forever to accelerate. I almost have to push the pedal to the floor. Jus had an oil change so i dont know what's...

    2007 Chevrolet TrailBlazer LS

    -

    Maintenance & Repair

  • 2004 chevy trailblazer 1 answer

    When driving at 50 mph to 70mph my rpm revs up and then goes down . wandering if its the trottle sensor .need help. 2004 chevy trailblazer

    2004 Chevrolet TrailBlazer LT 4WD

    -

    Maintenance & Repair

  • Won't start chevy trailblazer 9 answers

    So my 02 chevy trailblazer wont start on first turn of the key sometimes multiple times. Gauges read funny on the dash when it does fire. once it starts running though the voltage jumps back to nor...

    2002 Chevrolet TrailBlazer LS 4WD

    -

    Maintenance & Repair

Search Chevrolet TrailBlazer Questions

Chevrolet TrailBlazer Experts

#1 Tom Demyan
Tom Demyan
Reputation 800
#2 bigdogracer
bigdogracer
Reputation 790
#3 dandyoun
dandyoun
Reputation 620
View All

Related Models For Sale

Used Chevrolet Tahoe
558 Great Deals out of 31,371 listings starting at $1,500
Used Jeep Grand Cherokee
1,022 Great Deals out of 72,251 listings starting at $700
Used GMC Envoy
62 Great Deals out of 2,161 listings starting at $850
Used Chevrolet Silverado 1500
1,777 Great Deals out of 181,195 listings starting at $250
Used Chevrolet TrailBlazer EXT
26 Great Deals out of 977 listings starting at $800
Used Ford Explorer
926 Great Deals out of 70,249 listings starting at $997
Used Chevrolet Impala
591 Great Deals out of 34,068 listings starting at $899
Used Chevrolet Camaro
242 Great Deals out of 31,193 listings starting at $369
Used Chevrolet Blazer
3 Great Deals out of 1,188 listings starting at $1,820
Used Ford F-150
2,064 Great Deals out of 207,332 listings starting at $1,499
Used Dodge Durango
266 Great Deals out of 21,290 listings starting at $1,499
Used Ford Escape
1,438 Great Deals out of 90,835 listings starting at $900

Used Cars For Sale

2007 Chevrolet TrailBlazer LT 4WD For Sale
10 Great Deals out of 152 listings starting at $2,800
2006 Chevrolet TrailBlazer LT 4WD For Sale
7 Great Deals out of 122 listings starting at $1,995
2005 Chevrolet TrailBlazer LT 4WD For Sale
6 Great Deals out of 135 listings starting at $2,450

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.