Chevrolet TrailBlazer - Answered Questions & Fixed Issues

Question edited for clarity, 'year make model', first 3 words. Anti-theft immobilizer? Battery only has 11 volts or less, so not enough to open the injectors. It needs 12.6 to 13.2 when cranking. Fuel Pump Pressure? https://www.google.com/search?q=2006+Chevy+Trailblazer+4.2+symptoms+of+a+bad+fuse+relay+box https://www.google.com/search?q=2006+Chevy+Trailblazer+4.2+shuts+off+at+idle ..

Yes, you can use an inline fuel filter canister. https://www.google.com/search?q=inline+fuel+filter+canister ..

When you disconnect a battery you have to reset the Engine Immobilizer. Also the Throttle body needs calibration, or a learning procedure. Reset Security https://www.google.com/search?q=2006+chevy+trailblazer+anti+theft+rese ETB Relearn Procedure https://www.google.com/search?q=2006+chevy+trailblazer+throttle+body+relearn+procedure Or an auto electrician with a pro grade scan tool computer can fix in 30 to 45 minutes https://www.google.com/search?q=auto+electrician+near+me ..

https://www.google.com/search?q=2006+Chevy+Trail+Blazer+Passenger+door+switch+panel+wiring+diagram ..

get computer codes, see if have any codes listed, could have faulty neutral switch computer not detecting in gear, or air by-*** valve, vacuum leaks, check pcv valve,

Question edited for clarity. Turned around and add CAPS. Question moved to model category. In the link https://www.google.com/search?q=2003+Chevy+Trailblazer+diagram+of+serpentine+belt ..

Question edited for clarity, year make model needs to be first. Question moved from Misc to model category. You appear to be guessing at what parts to swap out? Your vehicle is fully electronic and has diagnostics built in. You just need an auto electrician with a professional grade scan tool computer. All the sensors can be tested in place with the computer, the coils can also be tested with it. They all report back to the Engine Control Module. It is cheaper to hire a technician for 30 minutes than guessing parts, and replacing sensors that are fine. https://www.google.com/search?q=mobile+auto+electrician+near+me ..

I have a 2008 Chevy trailblazer. Hard time cranking then runs really rough. And my r p m gauge drops after running a minute and loses power

Question edited for clarity. Question moved to model category. If you get a 4 foot length of 1\4" clear plastic hose, you can put one end in you ear and use it as a stethoscope to track down the humming. The closer you get, the louder the noise will become. Coolant Flush or engine oil flush? https://www.google.com/search?q=2004+Chevy+trailblazer+coolant+flush ..

Question edited for clarity and add maker. Question moved to model category. No they won't, they are too big. https://www.google.com/search?q=2004+Chevy+Trailblazer.+Will+265%2F75+16+fit ..

try checking for a 12v feed to the motor and iam sure you will find one ,i think the problem is the earth as the earth is the one that controls the speed via the reostat and the control knob ,so if its works with an earth then its either the reostat or the control switch

If CEL is on then you need to read the fault codes for direction. You've swapped a lot of parts unnecessarily and likely created more problems than you solved.You won't be successful guessing.Keep your old GM original parts because after matket engine sensors/actuators are notorious for poor quality and usually create more problems than solved.

Question edited for clarity. Question moved to model category. Wiring diagram with colours. https://www.trailvoy.com/threads/wire-diagram-of-brake-lights.212025/ more here https://www.google.com/search?q=2003+Chevy+Trailblazer.+tail+light+wiring+diagram ..

Our Professional Auto-Electrics Technician Jeff Armer writes. Jul 03, 2023 Engine coolant fan circuit malfunction 1 ? What code P0*** what ? How do you know it needs a new fan clutch ? Before you go hacking up your wiring. Do you know how this fan clutch works ? Cooling Fan Control The purpose of the electro-viscous (EV) fan clutch is to maintain powertrain cooling requirements. The powertrain control module (PCM) monitors the following sensors to regulate the fan speed; • Engine coolant temperature sensor • A/C refrigerant pressure sensor • Vehicle speed sensor • Intake air temperature sensor • Transmission fluid temperature sensor • Ambient air temperature sensor The PCM controls the electro-viscous fan clutch engagement. The PCM regulates a 12-volt pulse width modulated signal (PWM) to the cooling fan relay. The PWM signal determines the ON time of the relay. As the commanded state of the fan clutch increases, so does the ON time of the relay. This ON time directly effects the amount of time the solenoid, which is internal to the fan clutch, is energized. When the solenoid in the fan clutch is energized, it opens the spring loaded valve and allows fluid to flow from the storage chamber to the fluid coupling of the cooling fan clutch, increasing the fan speed. When the solenoid is de-energized, the spring loaded valve closes, and blocks the path of the fluid to the fluid coupling of the fan clutch, reducing fan speed. The fan has the ability to create a feedback signal, so the PCM has an actual fan speed input. This is done with a hall effect sensor internal to the fan clutch. The PCM supplies a 5-volt reference and a low reference to the hall effect sensor. The hall effect sensor returns a signal pulse through the cooling fan speed signal circuit in response to the reluctor track passing by the magnetic field of the hall effect sensor. The PCM commands the cooling fan to 100% under the following conditions: • Engine coolant temperature exceeds approximately 129°C (264°F). • The transmission oil temperature exceeds approximately 151°C (304°F). • A/C refrigerant pressure exceeds 1655 kPa (240 psi). • When certain DTC's set. These include P0116, P0117, P0118, P0125, P1481, P1482, and P1484. The scan tool can engage the cooling fan clutch. This is done with the engine controls special function menu screen. To engage the cooling fan, It can take up to 2 minutes for a 100% command with the engine at 2000 RPM. The lower the engine speed, the longer it will take the fan to engage. To disengage the cooling fan, it can take up to 2 minutes with the engine at 2000 RPM. The lower the engine speed, the longer it will take to disengage. In lower ambient air temperatures the cooling fan will engage in less time, however, it will take longer to disengage due to the properties of the fluid vs. temperature. Under certain conditions the cooling fan may be engaged at engine restart. They are as follows; • The cooling fan was engaged at the time the engine was turned off • The fluid may bleed from the storage chamber into the fluid coupling of the cooling fan Although the fan is commanded off at this time due to a cold start condition. This is the most likely time a vehicle driver will notice that the fan noise is excessive compared to normal engine starts with out cooling fan engaged. As the engine speed is increased the fan noise will be louder than before. These are normal conditions that can be very intermittent. Do you know how many DTC'S this system can set an what they are for ? DTC P0480 DTC P0483 or P0493 DTC P0495 DTC P0526 DTC P1258 DTC P1481 DTC P1482 DTC P1484 DTC P0480 Cooling Fan Relay 1 Control Circuit ,this wouldn't have anything to do with a bad clutch fan. ==================================== Basically, you are attacking the problem the wrong way and your solution won't work. The answer is in the electronics and you need an auto electrician with a professional grade scan tool computer to scan for the analytical data which will dictate the fix. https://www.google.com/search?q=auto+electrician+near+me ..

there are like 1billion cars noW doing this.

1. the gas cap was loose or bad !!!
2. theN the driver did not know it takes 30 driving cycles to clear the CEL lamp. OOPS 30? OBD2 DOES THAT. PER SERVICE MANUAL RULES, IF YOU READ THEM.
3. the fuse did not blow, or you'd have not asked where it is, I get that.!

99% of the time the cap was just loose or bad my car the 1% time, the purge solenoid stuck and my walmart silicon spray'd there (INSIDE IT) ended FAILURE for 50,000 more miles. learn to buy AND USE a scan tool (borrow, rent ,buy) tighten the cap again scan the pCM see the cel lamp reasons./ push reset on the toll (CEL goes off if lucky and not 100 other DTC errors set) and drive 3 times or more and the CEL stays off. the other resets are(NO SCAN TOOL,. REALLY?) 1: PULL BATTERY LUG FOR 15MIN AND PUT BACK OOPS RADIO GOES DEAD. dang 2: PULL ALL IOD FUSES. THE PCM MEMORY FUSE ONLY. Ecm F29 IS IT(MEM) (PCM) 10AMPS ALL DTCS NOW GONE, STORED. THE DATA FELL; INTO THE BIT BUCKET AS THEY SAY IF ALL TESTS AND WILD GUESSING REPLACING ALL EVAP; VALVES. THEN COMES THE SMOKE MACHINE TESTS. TO FIND THE LEAK THIS IS AND EPA MANDATED MONITOR IN USA. FOR SURE. THE 2 FUSES FOR BOTH EVAP VALVES ARE HERE.

This seems to cover it. Found from here https://www.google.com/search?q=Chevy+Trailblazer+Flash+computer+to+make+a+2006+with+24+teeth+to+work+in+my+2008+with+58+teeth

04 Trailblazer Engine Swap

https://www.trailvoy.com > ... > Engine Tunes/Mods Jun 7, 2011 - The 08 crank has a 56 tooth reluctor wheel on it. The 08 PCM needs this signal to run. Instead of getting 58 pulses per rev, it is getting 7 ... ..

Make sure you replace it after removal. It is part of the safety system and prevents you getting a broken neck in a crash. Depress the large button on the head restraint guide and raise the head restraint to the full up position. Depress the smaller button on the opposite head restraint guide and pull upward to remove from the seat.Jan 16, 2022

Rear headrest removal ' Trailblazer Forum

I would begin by looking at the fuses. Check for one labeled ECM or PCM... Those are the computers that control engine management. There are also fuses for the coil packs and fuel injectors.

I would check the turn signal switch. The cruise and turn signal are on the same switch. The brake lights go through the switch before going to the brake lights. And the turn signals don't work with the ignition off.