I am likely to catch heat for asking here. I have a customer with a GP GXP with a 5.3 and they said the transmission went out in it. No forward or reverse gears. Fluid has a slight burn smell to it.

This vehicle has the paddle shifters on it and I would likely know what different cues there are, if any, between this transmission and other 4T65e transmissions other than being an HD unit.

Input is greatly appreciated and thanks in advance

The 4t65e just can't handle being behind the 5.3. They are an extremely common failure point.

According to interchange, it has to be from another 2005 GP GXP. I'm not sure what the actual differences are between the years, likely electronic differences.

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Andrew - owner/operator of Bonnevilles Unlimited

2004 Bonneville GXP | 60k | White Gold Tricoat | custom built supercharged 3800 hot rod | garage queen
1997 Corvette | 57k | Silver Metallic | Z06 wheels | Date-night Hauler/Parts runner
2014 Town & Country Limited | Cashmere Pearl | 110k | Family Hauler
2002 Ram 1500 Quad Cab Sport | Black| 270k | Official Bonneville Hauler