20 Most Recent 2004 Chevrolet TrailBlazer - Page 3 Questions & Answers


Weak battery or bad connection

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


I agree with Enrique.
Just to add, Maybe you can take shift linkage loose and move tranny lever by hand, see if you can get it into park position? There are safety issues trying to do that, You don't want the vehicle to move. Safety is your responsibility. If the vehicle is on an incline, you may need to nudge it a little, so the tranny isn't holding the vehicle.
Can you check for applicable tranny codes, if there are any?
Just because the dash lites come on, doesn't mean the battery has a full charge. Just my opinion.

2004 Chevrolet... | Answered on Nov 20, 2017


Water is certainly getting into something electrical that should be sealed (maybe because of a windshield leak). You will have to find out where the water is getting in - under the dash, or if there is a loose electrical connector or the fuse cover is loose under the hood.

2004 Chevrolet... | Answered on Nov 02, 2017


I should guess it to be the electric fuel pump, although I thought those sounds had been eliminated by the manufacturers long ago. Perhaps you could raise the car in the air and get underneath it and see ( or I should say "hear")
That sound from the fuel pump should not mean it is bad or is going bad.
God bless your efforts.

2004 Chevrolet... | Answered on Oct 17, 2017


Possibly a defective ABS sensor, or low brake fluid. Recommend a reputable mechanic to assess the issue.

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


Are you on an incline? If so try rocking your vehicle forward and backward with others helping you. Your transmission may be bound. While the vehicle is rocking you should be able to shift the transmission into neutral.

2004 Chevrolet... | Answered on Sep 10, 2017


Get the trouble codes read. Otherwise you're totally in the dark about which wheel is causing the problem

2004 Chevrolet... | Answered on Sep 07, 2017


There are internal valve timing parts that are not operating correctly. Take it to a dealer to find out whether your warranty will cover the repairs.

2004 Chevrolet... | Answered on Sep 07, 2017


All those codes and such an easy fix. ALL of these codes point to your upstream 02 sensor. It's the one on the passenger side of the engine coming off the exhaust, very very easy to get to. Soak that puppy with PB Blaster then remove the electrical connector and remove and replace sensor. TRY to stay away from Bosch 02 sensors, have been known and reported problems with these. In my case, I didn't have a choice but to buy the Bosch, but I haven't had any problems with mine.

Hope this helps, look to get a tad more miles per gallon too.

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


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


Optra 5 2004 ls code 3241 worked for me . thankyou verymuch u guys saved me my time and money

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

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