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

60,295

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

1 out of 1 people think this is helpful.
59,175

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.
655

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 5,213 nationwide TrailBlazer listings starting at $900.

ZIP:

Search Chevrolet TrailBlazer Questions

UK Questions

Are you a UK consumer? CarGurus now has a discussion forum in the UK.

Chevrolet TrailBlazer Experts

#1 Tom Demyan
Tom Demyan
Reputation 740
#2 bigdogracer
bigdogracer
Reputation 600
#3 dandyoun
dandyoun
Reputation 550
View All

Related Models For Sale

Used Chevrolet Tahoe
819 Great Deals out of 27,811 listings starting at $1,700
Used Jeep Grand Cherokee
901 Great Deals out of 66,335 listings starting at $1,500
Used GMC Envoy
52 Great Deals out of 2,291 listings starting at $2,500
Used Chevrolet TrailBlazer EXT
9 Great Deals out of 1,248 listings starting at $1,900
Used Chevrolet Silverado 1500
2,513 Great Deals out of 152,116 listings starting at $1,500
Used Ford Explorer
1,072 Great Deals out of 71,554 listings starting at $1,000
Used Chevrolet Impala
902 Great Deals out of 35,274 listings starting at $1,700
Used Chevrolet Equinox
1,432 Great Deals out of 67,225 listings starting at $1,600
Used Chevrolet Blazer
1,342 listings starting at $2,000
Used Dodge Durango
365 Great Deals out of 23,168 listings starting at $1,500
Used Ford F-150
3,021 Great Deals out of 207,756 listings starting at $1,000
Used GMC Yukon
556 Great Deals out of 17,134 listings starting at $1,875

Used Cars For Sale

2007 Chevrolet TrailBlazer LS 4WD For Sale
8 Great Deals out of 249 listings starting at $2,990
2006 Chevrolet TrailBlazer LS 4WD For Sale
8 Great Deals out of 395 listings starting at $1,700