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

3 Answers

58,275

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

1 out of 1 people think this is helpful.
56,575

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 out of 2 people think this is helpful.
645

Hello, Clear the codes, and see which one (s) return, but Jim is Spot-On... ECM looks for fast increase in coolant temp to norm, and a few °'s difference makes all the difference in the world to the ECM... Good Luck-- AskTrannyMan

1 out of 1 people think this is helpful.

Your Answer

Add photo

Related Questions

TrailBlazer

Looking for a Used TrailBlazer in your area?

CarGurus has 5,376 nationwide TrailBlazer listings starting at $650.

ZIP:

Search Chevrolet TrailBlazer Questions

Chevrolet TrailBlazer Experts

#1 Tom Demyan
Tom Demyan
Reputation 680
#2 dandyoun
dandyoun
Reputation 550
#3 bigdogracer
bigdogracer
Reputation 520
View All

Related Models For Sale

Used Chevrolet Tahoe
1,067 Great Deals out of 32,280 listings starting at $1,495
Used Jeep Grand Cherokee
1,115 Great Deals out of 69,516 listings starting at $1,500
Used GMC Envoy
74 Great Deals out of 2,280 listings starting at $1,500
Used Chevrolet TrailBlazer EXT
21 Great Deals out of 1,286 listings starting at $1,850
Used Chevrolet Silverado 1500
2,622 Great Deals out of 148,534 listings starting at $1,800
Used Ford Explorer
1,432 Great Deals out of 71,888 listings starting at $985
Used Chevrolet Blazer
1,364 listings starting at $1,295
Used Chevrolet Impala
950 Great Deals out of 36,334 listings starting at $884
Used Chevrolet Equinox
1,720 Great Deals out of 70,642 listings starting at $1,500
Used Dodge Durango
455 Great Deals out of 23,004 listings starting at $1,200
Used Ford F-150
3,392 Great Deals out of 203,566 listings starting at $1,273
Used GMC Yukon
539 Great Deals out of 17,748 listings starting at $1,777

Used Cars For Sale

2007 Chevrolet TrailBlazer LS 4WD For Sale
13 Great Deals out of 222 listings starting at $1,900
2006 Chevrolet TrailBlazer LS 4WD For Sale
5 Great Deals out of 363 listings starting at $1,995