TrailBlazer 2002-2009
2023- The TrailBlazer, originally introduced as an upscale Blazer, was produced from 2002 to 2008 with a powerful I6 engine and with a monster V8 offered in the Trailblazer SS
Platform: GMT 305, 360, & 370.

Desparate --power / shift issues

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Old Jan 23, 2010 | 7:46 AM
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Question Desparate --power / shift issues

2002 Trailblazer automatic transmission --hesitates on acceleration, poor shifting (reaches 3000 RPMs at times with no shift). At what rpms would shifting occur? Where is the transmission control switch and could this be the problem?

PS. Code on OBD is PO171 (lean left bank)...where is this found and is there any kind of adjustment that the home mechanic can do?

I would appreciate any feedback....Thanks.

Mike
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