There are some reports that LBZ pistons are cracking. Oil pressure drop is speculated as the cause, leaving the underpiston oil flow shorted. Someone measured his oil temperature when climbing a hill with his trailer, it was 360 degrees.
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04 LLY SRW SB
06 SRW SB
EFILive all conditions no smoke 100 HP tune, exhaust,
TD-EOC, alternative stock Cold Air Intake.