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

67,575

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

Chevrolet TrailBlazer Experts

  • #1
    bigdogracer
    Reputation
    880
  • #2
    Tom Demyan
    Reputation
    860
  • #3
    tennisshoes
    Reputation
    660
View All

Related Models For Sale

Used Chevrolet Tahoe
646 Great Deals out of 37,041 listings starting at $1,800
Used Jeep Grand Cherokee
894 Great Deals out of 71,205 listings starting at $995
Used GMC Envoy
68 Great Deals out of 2,205 listings starting at $1,500
Used Chevrolet Silverado 1500
2,148 Great Deals out of 181,181 listings starting at $1,900
Used Ford Explorer
787 Great Deals out of 62,835 listings starting at $1,495
Used Chevrolet TrailBlazer EXT
13 Great Deals out of 1,040 listings starting at $1,500
Used Chevrolet Impala
589 Great Deals out of 34,530 listings starting at $1,250
Used Dodge Durango
261 Great Deals out of 20,328 listings starting at $999
Used Chevrolet Camaro
408 Great Deals out of 31,584 listings starting at $2,395
Used Chevrolet Blazer
3 Great Deals out of 1,144 listings starting at $950
Used GMC Yukon
425 Great Deals out of 20,778 listings starting at $2,495
Used Ford F-150
2,129 Great Deals out of 181,967 listings starting at $1,000

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
4 Great Deals out of 138 listings starting at $2,400
2005 Chevrolet TrailBlazer LT 4WD For Sale
6 Great Deals out of 128 listings starting at $1,650

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.