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2005 Chevrolet Chevrolet TrailBlazer EXT LS Questions & Answers
What are the probable causes of DTC PO128?
P0128- Coolant Temp below Thermostat. Sounds like the thermostat is stuck open. Do you get heat from the heater when the car is at operating temp. if not I would start there. Hope this helps.
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I have a 2005 Trailblazer that dies out when you come to a stop. It starts back up with no problem
The alternator wouldn't have anything to do with either of the problems your having ! The key getting stuck in the ignition could be a problem developing with the lock cylinder . Can you turn the key to the off position an then it won't come out ? Or it won't turn to the off position an then not come out ? There are safety devices in place that won't let the key come out if not in gear an foot on the brake pedal etc... electronic an they do fail . Electronic Park Lock (EPL)/Ignition Lock Cylinder Control Actuator:Linear Shift Assembly: If the vehicle is equipped with a column mounted gear shift, it has a linear shift assembly on the steering column. The linear shift assembly has a cable that runs from the linear shift assembly to the ignition lock cylinder case. The purpose of this cable is to prevent the ignition key from being turned to the OFF position when the transmission is in gear and the vehicle may still be moving. The linear shift assembly cable contains a pin that is spring loaded to mechanically prevent the ignition key cylinder from being turned to the lock position when the vehicle transmission is not in the PARK position. If vehicle power is lost, and/or the transmission is not in the PARK position the operator will not be able to turn the ignition key to the lock position and will not be able to remove the ignition key from the column.
Now for the stall at stops , Your vehicle has Throttle Actuator Control (TAC) System ,electronic throttle control or drive by wire ! It is electronical controlled .
There are sensors in the gas pedal an on the throttle body ,they are connected to the PCM/ECM - engine computer with wiring ! There is a DC electric motor on the throttle body , this is what opens the throttle plate . Throttle plates do become dirty with varnish an stuff that can cause idle problems ! There are videos on youtube showing how to clean a throttle plate .
How to Clean Throttle Body 2007 Chevy Trailblazer
Can not back up or even push it backwards in neutral running or not.
The right rear brake on my Granddaughters car was so worn that the pad jammed when turning backwards stopping any backwards motion. When going forward it did not jam and could be pushed or driven forward. Tell everyone that if you hear scraping noises when applying brakes to get them checked right away.
Changed alt battery light stays on all the time
The warning light means the alternator is not producing power to send to the battery. The light is grounded thru the alternator and once the alternator starts charging the voltage reverses and the light goes out.
You should test the alternator output on the truck and there may be a problem with the wiring.
Y would there be no communication to trans
A bad CAN data circuit , no power or ground to the module ! Do you have any DTC'S
DTC U0001 High Speed CAN Communication Bus
Modules connected to the high speed GMLAN serial data circuits monitor for serial data communications on the high speed GMLAN network during normal vehicle operation. Operating information and commands are exchanged among the modules. When a module detects a bus-off condition, a DTC U2100 will be set. This DTC can be retrieved as history only.
2005 Chevy Trail Blazer fan won't shut off
Are you talking about radiator fan, my info shows electro/viscous fan clutch. Can you check for applicable trouble codes? Around here some of the national brand auto stores will check codes for free. My info shows a list of codes for that fan system as long as my arm.
You should be able to pull fan fuse in under hood fuse block, so the battery doesn't run down, till you find out what is going on.
My brake lights aren't working and fuses, switch and lamps are new. Help?
Before you get too far, did you check applicable fuse circuits for voltage? Even if the fuse is good, if no voltage, the circuit is still dead. Use a testlight to check voltage. My info showed two fuses for brake circuit. One is in the rear seat fuse block.
Your owners manual should have fuse location info.
No dims, just brights? Need lights or fuse? Is there more fuse boxes than the one under the hood?
Have you tried operating headlamps in manual mode, not automatic? Do they work correctly in manual mode?
You have a low beam fuse in under hood fuse box. With headlamps on, low beam, any voltage at that fuse circuit? Even if the fuse is good, if no voltage on fuse circuit, the circuit is still dead.
Any applicable trouble codes? Some of the national brand auto stores will check codes for free.
My info shows second fuse box under rear seat.
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