Table 1 shows eleven common power train related problems of the 2003 GMC Sierra. The number one most common problem is related to the automatic transmission (nine problems). The second most common problem is related to the transfer case (five problems).
The transmission clunks when shifting from 2nd - 3 rd and at times the engine will rev and finally it will take off, this has caused an issue when going through an intersection. The dealership attempted four repairs and it is not fixed. Read details...
The contact owns a 2003 GMC Sierra. While the contact was examining his vehicle he noticed that there was oil dripping from the transfer case under the vehicle. The vehicle was taken to the dealer where the contact was informed that a cover should be put on the transfer case to stop the leaking. Read details...
I have a 2003 GMC Sierra pickup. My problem is the transmission does not work properly. I had 150 miles on the vehicle when the trans blew,now a clunkling noise every time the vehicle shifts. Gm calls this a downshift clunk noise and has issued a TSB requesting dealers not to attempt repair. Read details...