Question about 2004 GMC Sierra Denali

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04 trailblazer with inline 6 engine missing, sets off code

Last spring I had the check engine light come on after the engine started missing.
I found that #4 cylinder was misfiring from reading the code at my local napa.
I cleared the code and drove home (35 mi.) without any parts.
I pulled off the plastic over the engine and found that rain water was shorting out #4 spark plug.
After vacuming out that area around the spark plug, put everything back together, The trailblazer ran fine.
No more missing.
No more codes.

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There is a TSB (technical service bulletin) on this issue , with directions to install foam weatherstrip to the AIP.(air intake panel) . TSB #06-06-04-048b
J5

Posted on Jan 21, 2009

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6ya6ya
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Posted on Jan 02, 2017

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Why does my service engine soon light stay on for 18 seconds just long enough to make check engine light come on.


have code checked for check engine -the service light and the check engine may be a coincidence but the service are just reminders and the check engine is a problem that the vehicle onboard diagnostics computer found and is letting you know about so most auto stores can scan your vehicle for free and the code will be your start point towards repairing or solving your problem

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I have a 04 trailblazer check engine light was ongot it checkednumber 1 misfireI just replaced the cords and plugs so I took me 1 off put it on 2 the check engine light went off got home put the code...


code p0128 refers to coolant thermostat--coolant below thermostat regulating temperature==causes mechanical fault. ( thermostat stuck open --replace it) If you are experiencing cold weather then there is a problem with the ecm settings as the ecm should be compensating for the cold ambient temperature and setting the fuel mixture to richer than normal ( same as using a choke). Check the fault codes again and check for a coolant sensor fault.

Oct 31, 2014 | 2004 Chevrolet TrailBlazer

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2002 envoy code co550


you need to replace the tccm and get it programmed.


2-04-21-006E: Inoperative 4WD/AWD Lamps, Inoperative 4WD/AWD System, DTC C0550 Set No Communication with TCCM (Reprogram Transfer Case Control Module) - (Jul 20, 2006)
999999995.gif Subject: Inoperative 4WD/AWD Lamps, Inoperative 4WD/AWD System, DTC C0550 Set, No Communication with TCCM (Reprogram Transfer Case Control Module) Models: 2004 Buick Rainier 2002-2004 Chevrolet TrailBlazer, TrailBlazer EXT 2003-2004 Chevrolet Avalanche, Silverado, Suburban, Tahoe 2002-2004 GMC Envoy, Envoy XL 2003-2004 GMC Sierra, Yukon, Yukon XL 2004 GMC Envoy XUV 2002-2004 Oldsmobile Bravada with Electronic Shift or Active Transfer Case (RPOs NP1, NP4 or NP8)

This bulletin is being revised to add Subject information and change the labor operation. This bulletin cancels and supersedes Bulletin Number 03-04-21-006. Please discard Corporate Bulletin Numbers 02-04-21-006D and 03-04-21-006 (Section 04 -- Driveline/Axle).
ConditionSome customers may comment that the 4WD/AWD indicator lights on the selector switch do not work, or the 4WD/AWD system may be inoperative and/or the service 4WD light is illuminated. The condition is typically intermittent and always occurs at key-up. Upon investigation, the technician may find DTC C0550 set.
CauseThe Transfer Case Control Module (TCCM) has not received the wake-up call during key-up and has remained in the "sleep mode".
When the TCCM is in the "sleep mode", it will not communicate with the class II bus or the Tech 2®.
Correction
  1. Try to communicate with the TCCM. If no communication, go to step 2. If communication is possible, go to step 5.
  2. Remove the underhood (ATCM or TREC) TCCM fuse.
  3. Wait 30 seconds.
  4. Reinstall the fuse. The module should "wake up" and communicate with the Tech 2®.
  5. Check for codes in the TCCM. If a C0550 is found current or in history with or without other codes, replace the module and go to step 6.
  6. Reprogram the TCCM with the latest TIS software using normal SPS procedures.
  7. Verify operation and that no codes are present.
Important: For the 2002 model year, the TCCM must be replaced and reprogrammed.
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1 Answer

2006 chevy trail inline 6. Change engine oil light came on all of sudden. I changed the oil just 2000 miles ago. What does it mean? How do I reset ?


{: ) It could be that it was not reset properly and successfully when you last changed your oil. A scan tool can reset it better. Also, double check for oil level and leaks.

May 29, 2011 | 2006 Chevrolet Trailblazer

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We have an 04 Trailblazer that won't start. When


Well my friend, my first opinion would be to have your ECM checked out. You might know the slang name of it "the brain" and it runs your vehicle. Now if it malfunctioned/went bad, it won't be able to give you any codes. I would suggest starting there. That could be why your having trouble with your neutral saftey switch also. Good Luck.

May 07, 2010 | 2004 Chevrolet TrailBlazer

1 Answer

Miss fire on #3 cylinder ,im assuming #3 cylinder is 3rd from front to back,because #3 cylinder is the same either way you look at it on a inline 6 cylinder.thanx cal


Unless GM has changed things the front always #1 and counts up.1-2-3-4-5-6.None of my books show inline 6.Well hope this helps and good luck.

Mar 15, 2010 | 2005 Chevrolet TrailBlazer

3 Answers

Is there a hidden 'inline' fuse on a 04/6 cy


There are seperate "trailer" fuses in the fuse box in the engine compartment. Separate fuses for trailer left, right and running lights.

Check all fuses, I had the same issue before.

Good luck.

Aug 24, 2009 | 2004 Chevrolet TrailBlazer

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Service engine soon light flashing on acceleration


When the service engine soon light is flashing there is a miss fire in the motor if you look in your owners manual it will tell you that.The same thing happend to me and it endid up to be the cat...

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