GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 GMC_Truck 🢒 2007 🢒 Sierra Classic - 4WD 🢒 Transmission/Transaxle 🢒 Automatic Transmission - 4L60-E/4L65-E/4L70-E 🢒 Secondary Fluid Pump Noise

Secondary Fluid Pump Noise M33 Only

Secondary Fluid Pump Noise (M33 Only)

Checks

Causes

    • Inspect transmission fluid level. Refer to Transmission Fluid Check .
    • Transmission bottom pan damage.

Incorrect fluid level.

    • Secondary Fluid Pump contracting oil pan due to damage.
    • Secondary Fluid Pump is loose.
    • Secondary Fluid Pump overheating.
    • Pump motor high current draw.
    • High transmission fluid temperatures.

Secondary Fluid Pump.