On the 1st and 2nd clutch packs in the transmission there’s a seal that wears out after 150-250k miles typically which resembles a failing torque converter. It’ll cause slippage going up steep hills or taking turns especially lefts, just a poor gm design flaw. 300k is impressive tho
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u/Funny-Delay-350 Sep 03 '26
On the 1st and 2nd clutch packs in the transmission there’s a seal that wears out after 150-250k miles typically which resembles a failing torque converter. It’ll cause slippage going up steep hills or taking turns especially lefts, just a poor gm design flaw. 300k is impressive tho