No Second, Third, Fourth, Fifth, Seventh, Ninth, or Tenth Gear

WARNING: This page is about a different car, the 2023 GMC Sierra 3500 HD and 2023 GMC Sierra 2500 HD. However, it is still accessible from the selected car via links, so may be relevant.

Checks	Causes
2 - 3 - 4 - 5 - 7 - 9 - 10 Clutch Assembly	Inspect for damaged or worn 2 - 3 - 4 - 5 - 7 - 9 - 10 clutch plates (507, 508). Inspect for damaged 2 - 3 - 4 - 5 - 7 - 9 - 10 clutch piston (515), return spring (514), piston dam (511). Inspect for damaged 2 - 3 - 4 - 5 - 7 - 9 - 10 clutch piston dam retaining ring (510). Inspect for cut, worn or damaged 2 - 3 - 4 - 5 - 7 - 9 - 10 clutch piston seal (513, 516, 517), and dam seal (512). Inspect for improper selective 2 - 3 - 4 - 5 - 7 - 9 - 10 clutch backing plate retaining ring (505). Inspect for damaged 2 - 3 - 4 - 5 - 7 - 9 - 10 clutch backing plate (506). Inspect for worn splines on backing plate. Inspect for damaged triple clutch housing (518).

Checks

Causes

2 - 3 - 4 - 5 - 7 - 9 - 10 Clutch Assembly

Inspect for damaged or worn 2 - 3 - 4 - 5 - 7 - 9 - 10 clutch plates (507, 508).
Inspect for damaged 2 - 3 - 4 - 5 - 7 - 9 - 10 clutch piston (515), return spring (514), piston dam (511).
Inspect for damaged 2 - 3 - 4 - 5 - 7 - 9 - 10 clutch piston dam retaining ring (510).
Inspect for cut, worn or damaged 2 - 3 - 4 - 5 - 7 - 9 - 10 clutch piston seal (513, 516, 517), and dam seal (512).
Inspect for improper selective 2 - 3 - 4 - 5 - 7 - 9 - 10 clutch backing plate retaining ring (505).
Inspect for damaged 2 - 3 - 4 - 5 - 7 - 9 - 10 clutch backing plate (506). Inspect for worn splines on backing plate.
Inspect for damaged triple clutch housing (518).