Chevy TrailBlazer, TrailBlazer SS and GMC Envoy Forum banner
1 - 4 of 4 Posts

3 Posts
Discussion Starter · #1 ·
2004 Chevy Trailblazer LS 4.2lt vortex . 269,564 as of 10/12/2021.
Codes: P1071 ,P0405 ,P0902???
P0107 , P1060 , P0023,
Help . I'm very sad 馃槶

It goes into this mode out of nowhere . But if I pull over and switch the ignition off. It will crank back up fine, then it may or may not do it again .

2002 Pewter ls with automatic trans. 4x2, gray cloth interior.
173 Posts
I think P0023 is the VVT and is around $80 from a parts store. Can't say thats the cause but I'd at least inspect it, especially if it's original and with all those miles.

2004 chevy trailblazer_lt
110 Posts
Seems like you have a common thread among the codes
Reading Codes here > OBDII Codes Engine Light Definitions Diagnostic Repair | AutoCodes
Without firing the parts cannon i would look at the PCM and related connectors and harness`s for corrosion or damaged wiring causing a communication issue

Most read the following from that site >>
Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector's pins.
1 - 4 of 4 Posts