Technical Service Bulletin 21NA214 — 2020 GMC SIERRA 3500
EQUIPMENT
Bulletin Details
| TSB ID | 21NA214 |
| Manufacturer | |
| Vehicle | 2020 GMC SIERRA 3500 |
| Component | EQUIPMENT |
| Communication Date |
Bulletin Summary
This technical bulletin provides repair information to correct a customer concern of Service Engine Soon Lamp Illuminated, Harsh or Delayed Transmission Shifts Including Slip, Surge, Shudder, Noise, Whine, Growl, Shake and/or Vibration, DTCs P2002, P2463, P2459, P144E, P0421, P0422, P0106 and/or P20EE Set Current or in Recent History.
About Technical Service Bulletins
A Technical Service Bulletin (TSB) is a document issued by a vehicle manufacturer to its dealers, describing a known issue with a specific vehicle or set of vehicles and the recommended procedure to fix it. Unlike recalls, TSBs are not mandatory and are typically only performed if an owner reports the related issue. However, TSBs can be an indicator of common problems with a vehicle.
Other TSBs for the 2020 GMC SIERRA 3500
PIT6240
UNKNOWN OR OTHER
23-NA-073
ENGINE
23-NA-053
EQUIPMENT
PIE0665A
ELECTRICAL SYSTEM
N212354170-02
ELECTRICAL SYSTEM
21-NA-214
POWER TRAIN
PIT5746B
EQUIPMENT
21NA214
POWER TRAIN:AUTOMATIC TRANSMISSION
21NA214
ENGINE AND ENGINE COOLING
N212342980
ELECTRICAL SYSTEM