20 Most Recent 2004 Chevrolet TrailBlazer - Page 4 Questions & Answers

the po740 is a torque converter, clutch malfunction alarm
the po753 the PCM has detected an electrical problem in the shift solenoid (usually faulty shift solenoid.
the p1860 TCC, PWM solenoid electrical circuit
If it was my Blazer buy new solenoids and replace them.

2004 Chevrolet... | Answered on Aug 19, 2017

Low beams don't work ??????? But high beams do ????? DRL - daytime running lamps ?

HDM relay # 46 low beam relay , under hood fuse box.

2004 Chevrolet... | Answered on Aug 18, 2017

could be a big end or main bearing but there are a few simple checks that can be done first
1--have the oil pressure checked using a mechanical gauge
if there is a bad bearing there will be low pressure at idle
2 --check the exhaust for smoke under load
if there is a bad bearing , the escaping oil will overload the oil ring and produce smoke
( if smoke comes after idling at lights and on taking off that is valve stem seals)
3--- run the fault codes and check for knock sensor problems
the noise could be detonation under load from lean fuel mixture or incorrect timing
4---check the ignition timing
5-- run the engine when it is knocking and remove a plug wire and see if the knocking stops
bearings will stop knocking if there is no combustion to place load on the crankshaft
That will also indicate which big end you have to check if you have to pull the sump
Too far advanced will cause the pistons to slap the cylinder walls hard for too far advanced ignition
you statement that the noise goes after 40 indicates that it is not a bearing as the high the rpm the louder the noise
taking the foot off the pedal indicates detonation
lastly if all the checks prove good , you could always have the sump removed and check each big end and main individually for damage
sometimes a failing cam chain if fitted ( no motor identified) will knock as the chain hits the timing cover

2004 Chevrolet... | Answered on Jul 23, 2017

I am surprised the AAMCO techs have no ideas about this. This "slipping" could be caused by the overdrive system having a mechanical problem (e.g. sticking solenoid, leaking seal) when trying to engage or disengage.
The overdrive solenoid locks the torque converter when activated, and releases when deactivated, both starting to happen when the vehicle is above about 40 mph and depending on what the vehicle is doing at the time (accelerating, decelerating or coasting). When you depress the accelerator and the solenoid is engaged at close to this speed, it should immediately release, and then re-engage when you stop accelerating, and you should immediately feel a light "bump" each time, not a "fish bite".

2004 Chevrolet... | Answered on Jul 16, 2017

as a florida resident for over 30 yrs and a mechanic I'm Not a big fan of sunroofs I'm a convertible man. a sunroof can be a real problem and costly to repair. may I suggest pulling the fuse and not using the this feature as they are prone to leaking. this situation sounds dangerous and should be off line until a solution is found.

2004 Chevrolet... | Answered on Jul 14, 2017

The first thing to do get it checked for DTC'S - diagnostic trouble codes . Not at auto zone or any other parts store , you want to have full scan of all the modules on the car. Don't know how much you know about automotive electronics , computer controlled systems etc.... Your vehicle has at least 10 modules (computers ) on board , there all talk to each other on a serial data network . C.A.N - controller area network . Or in the case of GM it has it's own . GMLAN -
How to Diagnose Controller Area Network CAN When you turn that ignition switch to start it is an input to the computer ,be it the PCM or BCM ..

2004 Chevrolet... | Answered on Jul 01, 2017

You need to have your insturment cluster repaired !
How to repair GM Instrument Cluster Speedometer Gauge Stepper
Beside stepper motor problems the solder used on these clusters have a problem called silver migration . Can cause all kind of problems ! What this video from eric at south main auto .
Chevrolet Truck Battery Dies Overnight Part II YouTube
Chevrolet Truck Battery Dies Overnight Part

2004 Chevrolet... | Answered on Jun 27, 2017

check power steering pump --fluid level and operation ==also check the steering rack

2004 Chevrolet... | Answered on Jun 21, 2017

Gotta tell you, this question had me a little confused. Below are 2 wiring diagrams for you. One is for the cruise control circuit and the other is for the air conditioning circuit. The reason I gave you those is because it seems according to the wiring diagram in the cruise control that the fuse for the cruise control goes to the HVAC (air conditioning). According to the wiring diagram for the A/C yes that fuse also controls the ignition power for the A/C controller. In any case the fuse that would cover the cruise control is the number 30 fuse in the fuse panel located under the hood of the vehicle. Below is a picture of the location of the fuse panel and also fuse layout diagrams for the 6 cylinder and 8 cylinder engine vehicles as they have different layouts depending on the engine size. I hope this helps you and good luck.

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2004 Chevrolet... | Answered on May 29, 2017

Hi Eabyrd05.
It's possible that you have a Starter or Flywheel/Flex-plate issue. Your starter Bendix may not be completely disengaging from the flywheel like it should. I would take it to a mechanic that you trust and have them pull the starter and look at both the Flywheel/Flex-plate, Starter Bendix and solenoid. Hope this helps.

2004 Chevrolet... | Answered on May 23, 2017

Check that the wire connectors are clean and completely plugged together. No electric, no run, no sound.

2004 Chevrolet... | Answered on May 12, 2017

Check your linkeage bushing (plastic). Dorman makes a replacement, these tend to break. In the mean time, you can Jerry rig it. I've seen people use zip ties to get by.

2004 Chevrolet... | Answered on May 11, 2017

0.45 millimeter intake and exhaust cold engine.

2004 Chevrolet... | Answered on May 09, 2017

when was the last oil change --check and test the and or clean the camshaft position actuator solenoid its on passenger next to the powering steering pump the connection sometimes gets oil soaked and or the screen get clogged --if oil is old or low effects the sensor check and test the camshaft position sensor also it also is affected by oil ---other problems can be a plug or coil failing

2004 Chevrolet... | Answered on Apr 27, 2017

Ali, there is a recall for the drivers side door master switch. I believe 04' was included in the recall, regardless this problem affects ALL years of our platform. Water is able to penetrate the switch, say you open your door when it's raining out. Eventually the switch will start to melt out and can be a fire concern. 2 ways you can do this, call the dealer give them your vin # to see if 04 is included in the recall. OR pull one out of a wrecking yard, BUT, have the dealer on the phone when you do to give them the serial # off the master switch. Some of the newer TB's already had the problem fixed.

2004 Chevrolet... | Answered on Apr 25, 2017

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