Hi everyone.
2008 Yukon with 120k.
Oil change done every 4-5k miles. Transmission oil was replaced a year ago by GMC dealership, I constantly check it to make sure it's full and clean.
Here's my problem.
Every now and then I get a hard shift from 1st to 2nd, it's not a slip, it's more like a...
Picked these up on EBay, thought I'd share.
(Truck was dirty, it had rained for a couple of days)
Stock
Truck was off.
Truck was off.
This is without pressing on the brake, notice 3rd brake light is off.
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