2005 Chevy trailblazer
L6 4200
dash lights = no
codes = no
Repairs done = none
tech = mw
question = how to change idler pulley
MW:
The belt tensioner is held on by 1 bolt. Just release the tension of the belt
by installing a long 3/8 ratchet in the tensioner arm and turn it clockwise,
then slide the belt off. Bolt for the tensioner is either a 13mm or 15mm head
bolt. The idler pulley is held by 3 bolts that go in the side of the block.
Other related articles:
Other Repair
Questions
Chevrolet trailblazer 2006 check engine light.
GM tech = MW
question = If my fuel sending unit is bad does that mean that my fuel pump is in trouble?
GM Tech:
The answer is simply no.
The level sensor is part of the fuel module. Which is comprised of the fuel
pump, housing, pipes, filter, and the level sensor. The sensor can be replaced
separately.
Different fuels have been causing problems with this part and cause it fail. This
has no effect on the fuel pump.
Although, it is kind of up to you to have the pump replaced during level sensor
replacement, since the whole module need to be removed. It is a good practice
to replace the pump on high mileage vehicles, since a pump can fail at any time
and cause the truck to not start


2005 Chevy Trailblazer 4.2 Inline 6 cylinder.
Check engine light code P0014.
Question: I have no driveability problems and have erased the code but it eventually comes back. Should I
replace the cam phaser actuator solenoid to play it safe? Is the correct part number 12615873? It seems that
the power steering unit would be in the way of removing the solenoid, should I remove it and is there anything
else I would have to do? Thanks this is a very impressive site !
Answer: Yes, i would replace the actuator solenoid first, and also
change the oil. The power steering pump needs to be removed or
loosened enough. Three bolts through the pulley. Then clear the
codes. Check that the connector is not full of oil. If it is, clean it out with
brakes clean and apply a little di-electric grease. A 'Crank position
variance re-learn' may need to be done after replacement. This can
only be done with a computer diagnostic tool.
If the code returns, you may have an internal engine problem. There is
a detailed description in out site for crankshaft thrust bearing problem
that causes the crank pulley to walk in and out. Engine replacement
may be required. But these instances are rare.