Shift Speed
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Shift Speed - 5.3L and 4.8L, 3.42:1 Final Drive
| 5.3L (LY5, LMG, LC9) 4.8L (LY2) 3.42:1 Final Drive | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Percent Throttle | ||||||||||
| Trans Cal. | 12.5 | 25 | 50 | 75 | 100 | |||||
| Normal (Default) | Km/h | mph | Km/h | mph | Km/h | mph | Km/h | mph | Km/h | mph |
| 1-2 Upshift | 18 | 11.1 | 25 | 15.5 | 45 | 28.0 | 58 | 36.0 | 62 | 38.5 |
| 2-3 Upshift | 31.5 | 19.5 | 41 | 25.5 | 75 | 46.6 | 102 | 63.4 | - | - |
| 3-4 Upshift | 44 | 27 | 62 | 38.5 | 114 | 70.8 | - | - | - | - |
| 2-1 Down Shift | 13.5 | 8.4 | 13.5 | 8.4 | 13.5 | 8.4 | 13.5 | 8.4 | 52 | 32.3 |
| 3-2 Down Shift | 26.5 | 16.5 | 30 | 18.6 | 44 | 27.3 | 67 | 41.6 | 122 | 75.8 |
| 4-3 Down Shift | 38 | 23.6 | 41 | 25.5 | 71 | 44.1 | 121 | 75.2 | - | - |
| TCC Apply 4th Gear | 66 | 41.0 | 73 | 45.4 | - | - | - | - | - | - |
| GMT 900 5.3L/4.8L 4L60-E (M30) N/V = 23.20 |
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Shift Speed - 5.3L and 4.8L, 4.10:1 Final Drive
| 5.3L (LY5, LMG, LC9) 4.8L (LY2) 4.10:1 Final Drive | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Percent Throttle | ||||||||||
| Trans Cal. | 12.5 | 25 | 50 | 75 | 100 | |||||
| Normal (Default) | Km/h | mph | Km/h | mph | Km/h | mph | Km/h | mph | Km/h | mph |
| 1-2 Upshift | 16 | 9.9 | 21.5 | 13.4 | 38 | 23.6 | 51 | 31.7 | 53 | 32.9 |
| 2-3 Upshift | 26 | 16.2 | 35 | 21.7 | 64 | 39.8 | 89 | 55.3 | 106 | 65.9 |
| 3-4 Upshift | 37 | 23.0 | 52 | 32.3 | 97 | 60.3 | - | - | - | - |
| 2-1 Down Shift | 12 | 7.5 | 12 | 7.5 | 12 | 7.5 | 12 | 7.5 | 45 | 28.0 |
| 3-2 Down Shift | 22 | 13.7 | 25 | 15.5 | 37 | 23.0 | 56 | 34.8 | 102 | 63.4 |
| 4-3 Down Shift | 32 | 19.9 | 37 | 23.0 | 67 | 41.6 | 103 | 64.0 | - | - |
| TCC Apply 4th Gear | 55 | 34.2 | 61 | 37.9 | 118 | 73.3 | 121 | 75.2 | 121 | 75.2 |
| GMT 900 5.3L/4.8L 4L60-E (M30) N/V = 27.81 |
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Shift Speed - 5.3L and 4.8L, 3.23:1 Final Drive
| 5.3L (LY5, LMG, LC9) 4.8L (LY2) 3.23:1 Final Drive | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Percent Throttle | ||||||||||
| Trans Cal. | 12.5 | 25 | 50 | 75 | 100 | |||||
| Normal (Default) | Km/h | mph | Km/h | mph | Km/h | mph | Km/h | mph | Km/h | mph |
| 1-2 Upshift | 19 | 11.8 | 26.4 | 16.4 | 47.6 | 29.5 | 61.4 | 38.1 | 69.2 | 39.8 |
| 2-3 Upshift | 33.3 | 20.6 | 43.4 | 26.9 | 77.7 | 48.2 | 108 | 67.1 | - | - |
| 3-4 Upshift | 46.5 | 28.8 | 65.6 | 40.7 | 120.7 | 74.9 | - | - | - | - |
| 2-1 Down Shift | 14.2 | 8.8 | 14.2 | 8.8 | 14.2 | 8.8 | 14.2 | 8.4 | 55 | 34.1 |
| 3-2 Down Shift | 28 | 17.3 | 31.7 | 19.6 | 46.5 | 28.8 | 70.9 | 44 | - | - |
| 4-3 Down Shift | 40.2 | 24.9 | 43.4 | 26.9 | 75 | 46.6 | - | - | - | - |
| TCC Apply 4th Gear | 69 | 42.8 | 77.2 | 47.9 | - | - | - | - | - | - |
| GMT 900 5.3L/4.8L 4L60-E (M30) | ||||||||||
Shift Speed - 5.3L and 4.8L, 3.73:1 Final Drive
| 5.3L (LY5, LMG, LC9) 4.8L (LY2) 3.73:1 Final Drive | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Percent Throttle | ||||||||||
| Trans Cal. | 12.5 | 25 | 50 | 75 | 100 | |||||
| Normal (Default) | Km/h | mph | Km/h | mph | Km/h | mph | Km/h | mph | Km/h | mph |
| 1-2 Upshift | 17.5 | 10.8 | 23.6 | 14.6 | 41.7 | 25.9 | 56 | 34.7 | 58.2 | 36.1 |
| 2-3 Upshift | 28.5 | 17.7 | 38.4 | 23.8 | 70 | 43.4 | 110.5 | 68.6 | 116.5 | 72.3 |
| 3-4 Upshift | 40.6 | 25.2 | 57.1 | 35.4 | 106.6 | 66.2 | - | - | - | - |
| 2-1 Down Shift | 13 | 8 | 13 | 8 | 13 | 8 | 13 | 8 | 49.4 | 30.6 |
| 3-2 Down Shift | 24.1 | 14.9 | 27.4 | 17 | 40.6 | 25.2 | 61.5 | 38.2 | 112.1 | 69.6 |
| 4-3 Down Shift | 35.1 | 21.8 | 40.6 | 25.2 | 73.6 | 45.7 | 113.2 | 70.0 | - | - |
| TCC Apply 4th Gear | 60.4 | 37.5 | 67 | 41.6 | - | - | - | - | - | - |
| GMT 900 5.3L/4.8L 4L60-E (M30) | ||||||||||
Shift Speed - 6.0L, 4.10:1 Final Drive
| 6.0L (L76) 4.10:1 Final Drive | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Percent Throttle | ||||||||||
| Trans Cal. | 12.5 | 25 | 50 | 75 | 100 | |||||
| Normal (Default) | Km/h | mph | Km/h | mph | Km/h | mph | Km/h | mph | Km/h | mph |
| 1-2 Upshift | 17.3 | 10.7 | 23.9 | 14.8 | 47.3 | 29.3 | 59.5 | 37 | 63.6 | 39.5 |
| 2-3 Upshift | 28 | 17.3 | 40 | 24.8 | 73.6 | 45.7 | 100.2 | 62.2 | 107.0 | 66.5 |
| 3-4 Upshift | 39.3 | 24.4 | 54.5 | 33.8 | 106 | 65.8 | - | - | - | - |
| 2-1 Down Shift | 11.5 | 7.1 | 11.5 | 7.1 | 11.5 | 7.1 | 11.5 | 7.1 | 53.1 | 33 |
| 3-2 Down Shift | 20 | 12.4 | 20 | 12.4 | 39.4 | 24.5 | 62.7 | 39 | 100.5 | 62.4 |
| 4-3 Down Shift | 33 | 20 | 33 | 20 | 65.1 | 40.4 | 123.1 | 76.5 | - | - |
| TCC Apply 4th Gear | 57.9 | 36 | 66.7 | 41 | 120.6 | 74.9 | 120.6 | 74.9 | 120.6 | 74.9 |
| GMT 900 GMT 931 6.0L (L76) 4L70-E (M70) | ||||||||||