My dealer recommended a fuel injection service because of possible carbon buildup. The truck seems to run fine now and I think they are just trying to sell stuff.
Fuel Injection cleaning on 2002 GMC Sonoma
In my personal opinion, you are right to question this! If the vehicle runs fine, and not exhibiting driveability problems I wouldn't recommend it. Many shop receive kickbacks from the companies that sell these flush products, and this no doubt clouds their judgment as to when this service is needed.
IS THEIR ANY SUGGESTION YOU COULD GIVE ME . I REPLACED MY 3RD DOOR OPEN HANDEN TWO TIMES, AN IT BROOK AGAIN. BUT NOE ICAN NOT GET IT TO OPEN TO REPLACE IT.....ANY HELP I WOULD GREATLY APPRECIATE firstname.lastname@example.org