Hummer H2. Manual - part 2433

2

1. Install a scan tool.  

2. Turn ON the ignition, with the engine 

OFF. 

3. Record the DTC Freeze Frame and Failure 

Records.  

4. Clear the DTC.  

5. Drive the vehicle in D4 range under the 

following conditions: 

Accelerate the vehicle, ensuring that the 
PCM commands 1st, 2nd, 3rd and 4th 
gears. 

Did you detect a 4-3-3-4 shift pattern?

IMPORTANT:

Before clearing the DTC, use the scan 
tool in order to record the Freeze Frame 
and Failure Records. Using the Clear 
Info function erases the Freeze Frame 
and Failure Records from the PCM.

-

Go to Step 3

Go to Diagnostic 

Aids

3

1. Inspect the shift solenoid/hydraulic circuit 

for the following conditions: 

z

Debris or chips in the AFL oil 
passage.  

z

Debris or chips restricting oil flow 
in passage #29 of the case or 
through the spacer plate gasket into 
the valve body.  

z

A cracked 2-3 shift solenoid.  

z

A 2-3 shift valve which is stuck or 
hung up in the valve body bore.  

z

A 2-3 shuttle valve which is stuck or 
hung up in its bore.  

z

Damaged seals on the shift solenoid 
valves. 

Refer to Shift Solenoid Leak Test . 

2. Clean and inspect the related valves, bores 

and the valve body for debris or 
contamination.  

-

-

 

2004 Hummer H2 

2004 TRANSMISSION Automatic Transmission - 4L60-E/4L65-E Diagnosis (DTC P0218 To DTC P2771) - Hummer H2

 

DTC P0757 

Did you find and correct the condition?

Go to Step 4

4

Perform the following procedure in order to 
verify the repair: 

1. Select DTC.  

2. Select Clear Info.  

3. Drive the vehicle in D4 range under the 

following condition, only if traffic and 
road conditions permit: 

Hold the throttle at 40% and accelerate to 
64 km/h (40 mph). 

4. Select Specific DTC.  

5. Enter DTC P0756.  

 
Has the test run and passed?

-

Go to Step 5

Go to Step 2

5

With the scan tool, observe the stored 
information, capture info, and DTC Info. 
Does the scan tool display any DTCs that you 
have not diagnosed?

-

Go to Diagnostic 

Trouble Code 

(DTC) List in 

Engine Controls - 

6.0L (LQ4)

System OK

 

2004 Hummer H2 

2004 TRANSMISSION Automatic Transmission - 4L60-E/4L65-E Diagnosis (DTC P0218 To DTC P2771) - Hummer H2

 

Fig. 18: 1-2 Shift Solenoid (SS) & 2-3 Shift Solenoid (SS) Valve Fluid Diagram 
Courtesy of GENERAL MOTORS CORP. 

Circuit Description 

The 2-3 shift solenoid (SS) valve controls the fluid flow acting on the 2-3 shift valves. The 2-3 SS valve is a 
normally-open exhaust valve that is used with the 1-2 SS valve in order to allow four different shifting 
combinations. 

When the PCM detects a 1-2-2-1 shift pattern, then DTC P0757 sets. DTC P0757 is a type A DTC. 

Conditions for Running the DTC 

z

No TP sensor DTCs P0122 or P0123.  

z

No VSS assembly DTCs P0502 or P0503.  

z

No TCC solenoid valve DTC P0740.  

z

No TCC stuck ON DTC P0742.  

z

No 1-2 SS valve DTC P0753.  

z

No 2-3 SS valve DTC P0758.  

z

No 3-2 SS valve assembly DTC P0785.  

z

No TFP manual valve position switch DTC P1810.  

z

No TCC PWM solenoid valve DTC P2761.  

z

The engine speed is greater than 450 RPM for 5 seconds. 

 

2004 Hummer H2 

2004 TRANSMISSION Automatic Transmission - 4L60-E/4L65-E Diagnosis (DTC P0218 To DTC P2771) - Hummer H2

 

z

The engine is not in fuel cutoff.  

z

The gear range is D4.  

z

The TP angle is greater than 10 percent.  

z

The transmission fluid temperature is 20-130°C (68-266°F).  

z

The transmission output speed is 150 RPM or greater.  

z

The transfer case ratio in 4WD low is 0.9-1.2.  

z

The transfer case ratio in 4WD high is 2.6-2.85.  

Conditions for Setting the DTC 

DTC P0757 sets if both of the following conditions occur: 

Condition 1 

z

The PCM commands third gear for 1 second.  

z

The estimated gear ratio is 1.6-1.8.  

z

The engine torque is 36-368 N.m (50-500 lb ft).  

z

All conditions are met for 2 seconds.  

Condition 2 

z

The PCM commands fourth gear for 1 second.  

z

The estimated gear ratio is 1.8-3.3.  

z

The engine torque is 0-295 N.m (50-400 lb ft).  

z

All conditions are met for 2 seconds.  

Action Taken When the DTC Sets 

z

The PCM illuminates the malfunction indicator lamp (MIL).  

z

The PCM commands third gear only.  

z

The PCM commands maximum line pressure.  

z

The PCM inhibits TCC engagement.  

z

The PCM freezes transmission adapt functions.  

z

The PCM records the operating conditions when the Conditions for Setting the DTC are met. The PCM 
stores this information as Freeze Frame and Failure Records.  

z

The PCM stores DTC P0757 in PCM history.  

Conditions for Clearing the MIL/DTC 

z

The PCM turns OFF the MIL during the third consecutive trip in which the diagnostic test runs and 
passes.  

z

A scan tool can clear the MIL/DTC.  

 

2004 Hummer H2 

2004 TRANSMISSION Automatic Transmission - 4L60-E/4L65-E Diagnosis (DTC P0218 To DTC P2771) - Hummer H2