NEED HELP 2005 tb wheres the filter????

#1
hello to all, newbie to the forum,... now a little background I have a 2005 trailblazer 4x4 that I bought 5 years ago had 89.000 on 4.2 now it's got 109.000 and it's been bulletproof no problems till now.......

Now its starting to have problems starting on the cold mornings 32- it will start but it takes some cranking and it acts like you lost a cylinder on start up then clears up, last year in the freezing cold it would fire right up no issues...now the first thing is to replace the plugs I am assuming they are the factory originals...what else to look at??fuel pump pressure??

the other thing is, does it have a fuel filter??? and where is it?? I have looked but nothing..also finding one, nothing at auto zone, oreillys, advance, rock auto claims to have 3....

thanks in advance.........
 

Mike534x

Well-Known Member
#2
In 05 GM started putting the fuel filters on the Envoy/Trailblazer in the tank itself. So if you want to replace the filter, you have to replace the entire pump/sending unit as they are one whole assembly.
 

freddyboy61

Well-Known Member
#3
Might look into the Intake Air Temperature sensor. If the PCM doesn't see the actual temperature it will not call for the correct air/fuel mixture.
 
#4
Check the fuel pressure. Be careful attaching the fuel pressure tester to the port on the fuel rail as it can crack at the weld and leak. (Ask me how I know :worried:)
 

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