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Chevrolet Silverado 2500

Transmission parameters

The Chevrolet Silverado 2500 has 40 transmission parameters.

● Confirmed◆ In testing○ Supported× Not supported

How to read a parameter card

Transmission fluid temperature, filtered CHEVROLET_TF_T_FLTED_V2Confirmed

Pelican can show this parameter as the transmission fluid temperature.

  • Request22 29 5A
  • Service 22DID 295A
  • ModuleDA18 → 2AF118
  • Every1 s
  • Testing

Example reply from a 2025 Chevrolet Silverado 2500.

Bits 0 to 7 of the reply, 8 bits.

0x42 = 66 → (66 − 40) = 26 °C

Formula
(val − 40)
Range
-40 to 215 °C
Unit
°C

Confirmed for 2024 to 2025. In testing for 1999 to 2009, 2011, 2013 to 2014, 2018 to 2020, 2022 to 2023, 2026. Not supported for 2010, 2012, 2015 to 2017, 2021.

  1. The parameter's name and its ID in the OBDb. Confirmed shows when a response from a real car confirms the parameter.
  2. The clutch mark shows a Connectable, a parameter that Pelican surfaces in its interface.
  3. The service and PID/DID asked for, the control module it's sent to, and how often Pelican asks.
  4. The reply's bytes. The parameter's bytes are blue. Bytes for other parameters in the same reply are grayed out. Hover over a byte to see the parameter it represents.
  5. Where the parameter is in the response, and how Pelican converts the raw value into a value.
  6. A real reply, decoded. The raw value comes first, then the reading.
  7. Which model years have tested this parameter.

Clutch slip, AT C1, ring CHEVROLET_CLU_SLIP_C1_RING

  • Request22 28 51
  • Service 22DID 2851
  • Module7E2 → 7EA
  • Every1 s
  • Testing

Bits 0 to 15 of the reply, 16 bits. The value is signed.

Formula
(val ÷ 4)
Range
-8192 to 8191 rpm
Unit
rpm

In testing for 1999 to 2014, 2016 to 2026. Not supported for 2015.

Clutch slip, AT C3, ring CHEVROLET_CLU_SLIP_C3_RINGConfirmed

  • Request22 19 D4
  • Service 22DID 19D4
  • Module7E2 → 7EA
  • Every1 s
  • Testing

Example reply from a 2015 Chevrolet Silverado 2500.

Bits 0 to 15 of the reply, 16 bits. The value is signed.

0x0000 = 0 → (0 ÷ 4) = 0 rpm

Formula
(val ÷ 4)
Range
-8192 to 8191 rpm
Unit
rpm

Confirmed for 2015. In testing for 1999 to 2014, 2016 to 2026.

Current gear CHEVROLET_CURRENT_GEAR

  • Request22 1B 30
  • Service 22DID 1B30
  • Module7E2 → 7EA
  • Every250 ms
  • Testing

Bits 0 to 7 of the reply, 8 bits.

Formula
(val − 3)
Range
-3 to 252
Unit
Number

In testing for 1999 to 2014, 2016 to 2026. Not supported for 2015.

Current gear CHEVROLET_CURRENT_GEAR_7E0

  • Request22 19 9A
  • Service 22DID 199A
  • Module7E0 → 7E8
  • Every250 ms
  • Testing

Bits 0 to 7 of the reply, 8 bits.

Formula
val
Range
0 to 255
Unit
Number

In testing for 1999 to 2014, 2016 to 2026. Not supported for 2015.

Current gear CHEVROLET_CURRENT_GEAR_DA18

  • Request22 1B 30
  • Service 22DID 1B30
  • ModuleDA18 → 2AF118
  • Every1 s
  • Testing

Bits 0 to 7 of the reply, 8 bits.

Formula
(val − 3)
Range
-3 to 252
Unit
Number

In testing for 1999 to 2014, 2016 to 2026. Not supported for 2015.

Current gear CHEVROLET_CURRENT_GEAR_V2

  • Request22 19 9A
  • Service 22DID 199A
  • ModuleDA11 → 2AF111
  • Every250 ms
  • Testing

Bits 0 to 7 of the reply, 8 bits.

Formula
val
Range
0 to 255
Unit
Number

In testing for 1999 to 2014, 2016 to 2026. Not supported for 2015.

Current gear, variant 2 CHEVROLET_CURRENT_GEAR_VAR_2Confirmed

  • Request22 19 9A
  • Service 22DID 199A
  • Module7E2 → 7EA
  • Every250 ms
  • Testing

Example reply from a 2015 Chevrolet Silverado 2500.

Bits 0 to 7 of the reply, 8 bits.

0x00 = 0 → 0

Formula
val
Range
0 to 255
Unit
Number

Confirmed for 2015. In testing for 1999 to 2014, 2016 to 2026.

Current gear, variant 3 CHEVROLET_CURRENT_GEAR_VAR_3

  • Request22 32 01
  • Service 22DID 3201
  • Module7E0 → 7E8
  • Every250 ms
  • Testing

Bits 0 to 7 of the reply, 8 bits.

Formula
val
Range
0 to 255
Unit
Number

In testing for 1999 to 2014, 2016 to 2026. Not supported for 2015.

Current gear, variant 3 CHEVROLET_CURRENT_GEAR_VAR_3_V2

  • Request22 32 01
  • Service 22DID 3201
  • ModuleDA11 → 2AF111
  • Every250 ms
  • Testing

Bits 0 to 7 of the reply, 8 bits.

Formula
val
Range
0 to 255
Unit
Number

In testing for 1999 to 2014, 2016 to 2026. Not supported for 2015.

Gear ratio CHEVROLET_GEAR_RAT

  • Request22 19 A1
  • Service 22DID 19A1
  • Module7E4 → 7EC
  • Every250 ms
  • Testing

Bits 0 to 7 of the reply, 8 bits.

Formula
val
Range
0 to 255
Unit
Number

In testing for 1999 to 2014, 2016 to 2026. Not supported for 2015.

Gear ratio CHEVROLET_GEAR_RAT_V2

  • Request22 19 A1
  • Service 22DID 19A1
  • Module7E2 → 7EA
  • Every250 ms
  • Testing

Bits 0 to 7 of the reply, 8 bits.

Formula
val
Range
0 to 255
Unit
Number

In testing for 1999 to 2014, 2016 to 2026. Not supported for 2015.

Gear, AT position CHEVROLET_GEAR_POS

  • Request22 28 89
  • Service 22DID 2889
  • ModuleDA18 → 2AF118
  • Every250 ms
  • Testing

Bits 0 to 7 of the reply, 8 bits.

Formula
val
Range
0 to 255
Unit
Number

In testing for 1999 to 2014, 2016 to 2026. Not supported for 2015.

Shift gear CHEVROLET_CURRENT_GEAR_2

  • Request22 1B 30
  • Service 22DID 1B30
  • ModuleDA18 → 2AF118
  • Every1 s
  • Testing

Bits 0 to 7 of the reply, 8 bits.

Unit
Named states
States
Raw valueStateMeaning
1NEUTRALNeutral
2PARKPark
3REVERSEReverse
4D1Drive, gear 1
5D2Drive, gear 2
6D3Drive, gear 3
7D4Drive, gear 4
8D5Drive, gear 5
9D6Drive, gear 6
10D7Drive, gear 7
11D8Drive, gear 8
12D9Drive, gear 9
13D10Drive, gear 10

In testing for 1999 to 2014, 2016 to 2026. Not supported for 2015.

Shift gear CHEVROLET_GEAR

  • Request22 1B 30
  • Service 22DID 1B30
  • ModuleDA18 → 2AF118
  • Every1 s
  • Testing

Bits 0 to 7 of the reply, 8 bits.

Unit
Named states
States
Raw valueStateMeaning
1NEUTRALNeutral
2PARKPark
3REVERSEReverse
4D1Drive, gear 1
5D2Drive, gear 2
6D3Drive, gear 3
7D4Drive, gear 4
8D5Drive, gear 5
9D6Drive, gear 6
10D7Drive, gear 7
11D8Drive, gear 8

In testing for 1999 to 2014, 2016 to 2026. Not supported for 2015.

Shifter position indicator CHEVROLET_SHIFTER_POS

  • Request22 1B 1A
  • Service 22DID 1B1A
  • Module7E3 → 7EB
  • Every1 s
  • Testing

Bits 0 to 7 of the reply, 8 bits.

Formula
(val − 146)
Range
-146 to 109
Unit
Number

In testing for 1999 to 2014, 2016 to 2026. Not supported for 2015.

Shifter X position sensor 1 duty cycle CHEVROLET_SHIFTER_X_POS_SENS_1

  • Request22 1B 1B
  • Service 22DID 1B1B
  • Module7E3 → 7EB
  • Every1 s
  • Testing

Bits 0 to 7 of the reply, 8 bits.

Formula
val
Range
0 to 255
Unit
Number

In testing for 1999 to 2014, 2016 to 2026. Not supported for 2015.

Shifter X position sensor 1 frequency CHEVROLET_SHIFTER_X_POS_SENS_1_FREQUENCY

  • Request22 1B 1F
  • Service 22DID 1B1F
  • Module7E3 → 7EB
  • Every1 s
  • Testing

Bits 0 to 7 of the reply, 8 bits.

Formula
val
Range
0 to 255
Unit
Number

In testing for 1999 to 2014, 2016 to 2026. Not supported for 2015.

Shifter X position sensor 2 duty cycle CHEVROLET_SHIFTER_X_POS_SENS_2

  • Request22 1B 1D
  • Service 22DID 1B1D
  • Module7E3 → 7EB
  • Every1 s
  • Testing

Bits 0 to 7 of the reply, 8 bits.

Formula
val
Range
0 to 255
Unit
Number

In testing for 1999 to 2014, 2016 to 2026. Not supported for 2015.

Shifter X position sensor 2 frequency CHEVROLET_SHIFTER_X_POS_SENS_2_FREQUENCY

  • Request22 1B 21
  • Service 22DID 1B21
  • Module7E3 → 7EB
  • Every1 s
  • Testing

Bits 0 to 7 of the reply, 8 bits.

Formula
val
Range
0 to 255
Unit
Number

In testing for 1999 to 2014, 2016 to 2026. Not supported for 2015.

Shifter Y position sensor 1 duty cycle CHEVROLET_SHIFTER_Y_POS_SENS_1

  • Request22 1B 1C
  • Service 22DID 1B1C
  • Module7E3 → 7EB
  • Every1 s
  • Testing

Bits 0 to 7 of the reply, 8 bits.

Formula
val
Range
0 to 255
Unit
Number

In testing for 1999 to 2014, 2016 to 2026. Not supported for 2015.

Shifter Y position sensor 1 frequency CHEVROLET_SHIFTER_Y_POS_SENS_1_FREQUENCY

  • Request22 1B 20
  • Service 22DID 1B20
  • Module7E3 → 7EB
  • Every1 s
  • Testing

Bits 0 to 7 of the reply, 8 bits.

Formula
val
Range
0 to 255
Unit
Number

In testing for 1999 to 2014, 2016 to 2026. Not supported for 2015.

Shifter Y position sensor 2 duty cycle CHEVROLET_SHIFTER_Y_POS_SENS_2

  • Request22 1B 1E
  • Service 22DID 1B1E
  • Module7E3 → 7EB
  • Every1 s
  • Testing

Bits 0 to 7 of the reply, 8 bits.

Formula
val
Range
0 to 255
Unit
Number

In testing for 1999 to 2014, 2016 to 2026. Not supported for 2015.

Shifter Y position sensor 2 frequency CHEVROLET_SHIFTER_Y_POS_SENS_2_FREQUENCY

  • Request22 1B 22
  • Service 22DID 1B22
  • Module7E3 → 7EB
  • Every1 s
  • Testing

Bits 0 to 7 of the reply, 8 bits.

Formula
val
Range
0 to 255
Unit
Number

In testing for 1999 to 2014, 2016 to 2026. Not supported for 2015.

Transmission fluid pump, auxiliary CHEVROLET_TRANS_FLUID_PMP_AUX

  • Request22 2C 05
  • Service 22DID 2C05
  • Module7E1 → 7E9
  • Every1 s
  • Testing

Bits 0 to 7 of the reply, 8 bits.

Formula
(val × 20 ÷ 51)
Range
0 to 100 %
Unit
%

In testing for 1999 to 2014, 2016 to 2026. Not supported for 2015.

Transmission fluid temperature CHEVROLET_TFT

Pelican can show this parameter as the transmission fluid temperature.

  • Request22 19 40
  • Service 22DID 1940
  • ModuleDA18 → 2AF118
  • Every1 s
  • Testing

Bits 0 to 7 of the reply, 8 bits.

Formula
(val − 40)
Range
-40 to 215 °C
Unit
°C

In testing for 1999 to 2014, 2016 to 2026. Not supported for 2015.

Transmission fluid temperature, filtered CHEVROLET_TF_T_FLTED

  • Request22 29 5A
  • Service 22DID 295A
  • Module7E2 → 7EA
  • Every5 s
  • Testing

Bits 0 to 7 of the reply, 8 bits.

Formula
(val − 40)
Range
-40 to 215 °C
Unit
°C

In testing for 1999 to 2014, 2016 to 2026. Not supported for 2015.

Transmission fluid temperature, filtered CHEVROLET_TF_T_FLTED_DA18Confirmed

  • Request22 29 5A
  • Service 22DID 295A
  • ModuleDA18 → 2AF118
  • Every1 s
  • Testing

Example reply from a 2025 Chevrolet Silverado 2500.

Bits 0 to 7 of the reply, 8 bits.

0x42 = 66 → (66 − 40) = 26 °C

Formula
(val − 40)
Range
-40 to 215 °C
Unit
°C

Confirmed for 2024 to 2025. In testing for 1999 to 2009, 2011, 2013 to 2014, 2018 to 2020, 2022 to 2023, 2026. Not supported for 2010, 2012, 2015 to 2017, 2021.

Transmission fluid temperature, filtered CHEVROLET_TF_T_FLTED_V2Confirmed

Pelican can show this parameter as the transmission fluid temperature.

  • Request22 29 5A
  • Service 22DID 295A
  • ModuleDA18 → 2AF118
  • Every1 s
  • Testing

Example reply from a 2025 Chevrolet Silverado 2500.

Bits 0 to 7 of the reply, 8 bits.

0x42 = 66 → (66 − 40) = 26 °C

Formula
(val − 40)
Range
-40 to 215 °C
Unit
°C

Confirmed for 2024 to 2025. In testing for 1999 to 2009, 2011, 2013 to 2014, 2018 to 2020, 2022 to 2023, 2026. Not supported for 2010, 2012, 2015 to 2017, 2021.

Transmission gear position CHEVROLET_TRANS_GEAR_POS

  • Request22 28 89
  • Service 22DID 2889
  • Module7E1 → 7E9
  • Every250 ms
  • Testing

Bits 0 to 7 of the reply, 8 bits.

Formula
val
Range
0 to 255
Unit
Number

In testing for 1999 to 2014, 2016 to 2026. Not supported for 2015.

Transmission input shaft speed CHEVROLET_TRANS_INPUT_SHFT_SPD

  • Request22 19 41
  • Service 22DID 1941
  • Module7E4 → 7EC
  • Every1 s
  • Testing

Bits 0 to 7 of the reply, 8 bits.

Formula
val
Range
0 to 255 rpm
Unit
rpm

In testing for 1999 to 2014, 2016 to 2026. Not supported for 2015.

Transmission input shaft speed, 2 CHEVROLET_TRANS_ISSConfirmed

  • Request22 19 41
  • Service 22DID 1941
  • Module7E2 → 7EA
  • Every1 s
  • Testing

Example reply from a 2015 Chevrolet Silverado 2500.

Bits 0 to 15 of the reply, 16 bits. The value is signed.

0x0000 = 0 → (0 ÷ 4) = 0 rpm

Formula
(val ÷ 4)
Range
-8192 to 8191 rpm
Unit
rpm

Confirmed for 2015. In testing for 1999 to 2014, 2016 to 2026.

Transmission park position switch 1 CHEVROLET_TRANS_PARK_POS_1

  • Request22 1B 23
  • Service 22DID 1B23
  • Module7E3 → 7EB
  • Every1 s
  • Testing

Bits 0 to 7 of the reply, 8 bits.

Formula
val
Range
0 to 255
Unit
Number

In testing for 1999 to 2014, 2016 to 2026. Not supported for 2015.

Transmission park position switch 2 CHEVROLET_TRANS_PARK_POS_2

  • Request22 1B 24
  • Service 22DID 1B24
  • Module7E3 → 7EB
  • Every1 s
  • Testing

Bits 0 to 7 of the reply, 8 bits.

Formula
val
Range
0 to 255
Unit
Number

In testing for 1999 to 2014, 2016 to 2026. Not supported for 2015.

Transmission pressure CHEVROLET_TRANS_P

  • Request22 28 62
  • Service 22DID 2862
  • Module7E2 → 7EA
  • Every1 s
  • Testing

Bits 0 to 15 of the reply, 16 bits. The value is signed.

Formula
val
Range
-32768 to 32767
Unit
Number

In testing for 1999 to 2014, 2016 to 2026. Not supported for 2015.

Transmission pressure CHEVROLET_TRANS_P_V2

  • Request22 28 62
  • Service 22DID 2862
  • Module7E1 → 7E9
  • Every1 s
  • Testing

Bits 0 to 15 of the reply, 16 bits. The value is signed.

Formula
val
Range
-32768 to 32767
Unit
Number

In testing for 1999 to 2014, 2016 to 2026. Not supported for 2015.

Transmission pressure CHEVROLET_TRANS_P_V3

  • Request22 28 62
  • Service 22DID 2862
  • ModuleDA18 → 2AF118
  • Every1 s
  • Testing

Bits 0 to 15 of the reply, 16 bits. The value is signed.

Formula
val
Range
-32768 to 32767
Unit
Number

In testing for 1999 to 2014, 2016 to 2026. Not supported for 2015.

Transmission RPM CHEVROLET_TRANS_RPM

  • Request22 19 42
  • Service 22DID 1942
  • Module7E1 → 7E9
  • Every250 ms
  • Testing

Bits 0 to 15 of the reply, 16 bits.

Formula
(val ÷ 8)
Range
0 to 8191 rpm
Unit
rpm

In testing for 1999 to 2014, 2016 to 2026. Not supported for 2015.

Transmission shift interlock switch 1 CHEVROLET_TRANS_SHIFT_1

  • Request22 1B 25
  • Service 22DID 1B25
  • Module7E3 → 7EB
  • Every1 s
  • Testing

Bits 0 to 7 of the reply, 8 bits.

Formula
val
Range
0 to 255
Unit
Number

In testing for 1999 to 2014, 2016 to 2026. Not supported for 2015.

Transmission shift interlock switch 2 CHEVROLET_TRANS_SHIFT_2

  • Request22 1B 26
  • Service 22DID 1B26
  • Module7E3 → 7EB
  • Every1 s
  • Testing

Bits 0 to 7 of the reply, 8 bits.

Formula
val
Range
0 to 255
Unit
Number

In testing for 1999 to 2014, 2016 to 2026. Not supported for 2015.

Transmission torque requested CHEVROLET_TRANS_TQ_REQ

  • Request22 28 8A
  • Service 22DID 288A
  • Module7E1 → 7E9
  • Every250 ms
  • Testing

Bits 0 to 15 of the reply, 16 bits.

Formula
(val − 22534)
Range
-22534 to 43001 N·m
Unit
N·m

In testing for 1999 to 2014, 2016 to 2026. Not supported for 2015.

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