2004 trailblazer ls 4x4

Asked by Jun 01, 2015 at 09:21 PM about the 2004 Chevrolet TrailBlazer LS 4WD

Question type: Maintenance & Repair

car was running great then all of out of the blue was baily running   stop at oreillys pulled 22 codes out all electrical  po300 po128 u13101 b2725 bo790 bo785 bo780bo775 bo770  co 550 co379 co374 co359 co327 co321 co 306 co 305 co 300 co040 co035 v 1064 v1255

2 Answers

68,865

With this many code,s showing,there is and issue with the ECM.

1 of 1 people found this helpful.
70,815

The two codes to be concerned with are the P0300 (random/multi-cylinder misfire) and the P0128 (coolant temp below thermostat temp). If your Trailblazer has over 100,000 miles on it you're overdue for a tune up. That could be the reason for the P0300 code. The spark plugs and spark plug wires are worn out. Replace the thermostat with a 195°F one. Sounds like the thermostat is stuck open (P0128). On a computer controlled engine the coolant must reach operating temp (195°F) within a certain time after a cold start or the P0128 code will be triggered. HTH. -Jim

2 of 2 people found this helpful.

Your Answer

TrailBlazer

Looking for a Used TrailBlazer in your area?

CarGurus has 4,593 nationwide TrailBlazer listings starting at $1,300.

ZIP:

Chevrolet TrailBlazer Experts

  • #1
    bigdogracer
    Reputation
    910
  • #2
    Tom Demyan
    Reputation
    890
  • #3
    tennisshoes
    Reputation
    700
View All

Related Models For Sale

Used Chevrolet Tahoe
719 Great Deals out of 41,288 listings starting at $1,995
Used Jeep Grand Cherokee
836 Great Deals out of 70,386 listings starting at $700
Used GMC Envoy
58 Great Deals out of 2,147 listings starting at $1,482
Used Chevrolet Silverado 1500
2,235 Great Deals out of 168,218 listings starting at $995
Used Ford Explorer
856 Great Deals out of 67,261 listings starting at $1,000
Used Chevrolet Impala
549 Great Deals out of 35,119 listings starting at $1,250
Used Chevrolet TrailBlazer EXT
13 Great Deals out of 1,048 listings starting at $1,999
Used Chevrolet Equinox
975 Great Deals out of 61,863 listings starting at $999
Used Dodge Durango
247 Great Deals out of 22,341 listings starting at $895
Used GMC Yukon
423 Great Deals out of 22,409 listings starting at $1,995
Used Ford F-150
2,531 Great Deals out of 193,412 listings starting at $799
Used Chevrolet Blazer
5 Great Deals out of 1,090 listings starting at $950

Used Cars For Sale

2007 Chevrolet TrailBlazer LS 4WD For Sale
10 Great Deals out of 216 listings starting at $2,500
2005 Chevrolet TrailBlazer LS 4WD For Sale
8 Great Deals out of 322 listings starting at $1,950

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.