GM Service Manual Online
For 1990-2009 cars only

Shift Speed 1-2 and 2-3 Shifts

 

1-2 Shift Output Shaft RPM

2-3 Shift Output Shaft RPM

Engine

% of TPS

12

25

50

100

12

25

50

100

Mode

 

 

L18

8.1L

Normal

462

636

1040

1300

867

1127

1792

2312

L18

8.1L

Tow/Haul

722

722

1040

1300

1445

1445

1792

2370

LBZ

6.6L

Normal

462

462

491

780

838

838

925

1503

LBZ

6.6L

Tow/Haul

607

607

607

809

1272

1272

1272

1618

Shift Speed 3-4, 4-5, 5-6, and CT Downshifts

 

3-4 Shift Output Shaft RPM

4-5 Shift Output Shaft RPM

5-6 Shift Output Shaft RPM

Closed Throttle Downshift Output Shaft RPM

 

 

 

 

6-5

5-4

4-3

3-2

2-1

Engine

% of TPS

12

25

50

12

25

50

12

25

50

0

0

0

0

0

Mode

 

 

 

 

L18

8.1L

Normal

1185

1474

2370

1647

2081

3237

2451

2451

3488

1994

1517

1243

766

202

L18

8.1L

Tow/Haul

2023

1965

2399

2875

2774

3352

2976

3038

3756

2514

2167

1532

1040

202

LBZ

6.6L

Normal

1127

1127

1199

1589

1589

1705

2225

2225

2688

1821

1387

1040

694

202

LBZ

6.6L

Tow/Haul

1676

1676

1676

2539

2539

2539

2630

2630

2890

2312

2110

1561

1098

202