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Old 07-05-2023, 02:45 PM   #524
snizzle
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Drives: '12 Camaro SS, '18 Colorado Z71
Join Date: Mar 2009
Location: Richmond, VA
Posts: 3,547
My 2018 Z71 V6 is at 18.9, 47k miles, heavy city driving slant. I can get mid 20s pretty easily on the highway. I would note both of your vehicles are lifted, wider stance, etc. I am guessing the WT/LT Colorado might do better.

Btw, I had to take mine back to the shop for the dreaded trans shudder, the flush cleared it up (again). I hope a torque converter is not in my future after powertrain warranty expires. I also hope for your sake that this new revised 8spd was truly revised/fixed.
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2012 2SS 45th AE LS3 M6

Borla ATAK Catback
Kooks Stepped LT Headers
CAI Intake
Hexvents
VMAX CNC Ported Throttle Body
RX Catch Can
Hurst Short Throw Shifter
Pfadt ZL-Spec Stage 3 Suspension
Forgestar F14
Tuned by Frost
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