No Third, Fifth, and Reverse Gear

WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2011 GMC Yukon XL, 2011 GMC Yukon, 2011 Chevrolet Tahoe, 2011 Chevrolet Suburban, and 2011 Chevrolet Avalanche. However, it is still accessible from the selected car via links, so may be relevant.

Checks	Causes
A/Trans Fluid Pan Assembly (29)	Verify proper fluid level and condition, inspect transmission assembly for leaks.
Control Valve Upper Body Assembly (304)	Inspect for sticking, damaged, or worn 3-5-R regulator valve (336) and valve spring (326). Inspect for damaged or stuck #7 ball check valve.
Control Valve Lower Body Assembly (307)	Inspect for worn, damaged, or sticking clutch select solenoid valve 3 (352) and valve spring (353).
1-2-3-4 and 3-5-R Clutch Assembly (51)	Inspect for proper installation of 3-5-R clutch backing plate retaining ring (400). Inspect for worn, damaged, or leaking clutch bearing seal assembly (428). Inspect for damaged or worn 3-5-R clutch plates (401-404). Inspect for damaged 3-5-R clutch piston (421), apply ring (405), and spring (420). Inspect for cut, worn, or damaged 3-5-R clutch piston dam O-ring seal (418), inner seal (419), and outer seal (422). Inspect for improper selective 3-5-R clutch backing plate retaining ring (400).
Control Solenoid (w/Body and TCM) Valve Assembly (314)	Pressure control solenoid 2 commanded/failed HIGH (off) or leaking - Perform solenoid valve assembly function test. Refer to Control Solenoid Valve and Transmission Control Module Assembly Solenoid Performance Test .
A/Trans Fluid Pump (Transfer) Seal Assembly (19)	Inspect for damage or leaks.