Sierra Classic 2500 4WD V8-6.0L (2007)
2. Pre-assemble the following parts:
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The reverse boost valve bushing
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A new reverse boost valve
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A new pressure regulator spring retainer
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The added isolator pressure regulator spring
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The pressure regulator spring
3. Install the pre-assembled parts into the pump bore.
4. Install the reverse boost valve bushing retainer ring while holding the reverse boost valve bushing in place. Ensure the retainer ring (2) is in the
groove.
5. Install the transmission filter. Refer to Automatic Transmission Fluid and Filter Replacement.
6. Fill the transmission to the proper level with DEXRON(r) VI transmission fluid. Refer to Transmission Fluid Check.
7. Important:
It is recommended that transmission adaptive pressure (TAP) information be reset.
Resetting the TAP values using a scan tool will erase all learned values in all cells. As a result, the engine control module (ECM), powertrain
control module (PCM) or transmission control module (TCM) will need to relearn TAP values. Transmission performance may be affected as new
TAP values are learned.
Reset the TAP values. Refer to Transmission Adaptive Functions.
