For 1990-2009 cars only

Makes 🢒 GMC_Truck 🢒 2006 🢒 GMC Sierra Denali 🢒 Transmission/Transaxle 🢒 Automatic Transmission - Allison 🢒 Transmission Will Not Stay in Forward or Reverse

Transmission Will Not Stay in Forward or Reverse for GMC Truck GMC Sierra Denali 2006

Condition	Action
Low fluid	Adjust the fluid level. Refer to Transmission Fluid Check .
Leaking at solenoid assembly	Replace the solenoid assembly. Refer to Control Valve Solenoid Replacement .
Low pressure	Repair the transmission.
Faulty solenoid - leaking	Replace the solenoid. Refer to Control Valve Solenoid Replacement .