Possible causes
– Faulty Throttle Actuator Control (TAC) module
– Throttle Actuator Control (TAC) module harness is open or shorted
– Throttle Actuator Control (TAC) module circuit poor electrical connection (loose or broken wires)
– Throttle Actuator Control (TAC) module harness is open or shorted
– Throttle Actuator Control (TAC) module circuit poor electrical connection (loose or broken wires)
Tech description
There is a factory service bulletin for the P2108 code on following Cadillac vehicles:
2006-2007 GMC Savana 1500/2500/3500
2006-2007 GMC Sierra
2006-2007 GMC Sierra Flex Fuel
2006-2007 GMC Sierra Hybrid
2006-2007 GMC Sierra Performance Edition
2006-2007 GMC Sierra 2500/3500 HD
2006-2007 GMC Yukon
Factory Service Bulletin GMC OBDII Code P2108
When is the obd code mean?
The Throttle Actuator Control (TAC) module is unable to write or read data from the Random Access Memory (RAM)
Symptoms
– Engine Light ON (or Service Engine Soon Warning Light)
– No throttle response
– No throttle response
P2108 GMC OBD Code Description