One problem related to windshield wiper/washer motor has been reported for the 1999 GMC Sierra. The most recently reported issues are listed below.
While traveling windshield wipers would work intermittently during usage, causing poor visibility.
| Power Window problems | |
| Side/rear Glass problems | |
| Windshield Wiper/washer problems | |
| Windshield problems | |
| Windshield Wiper/washer Motor problems | |
| Windshield Wiper/washer Linkages problems | |
| Exterior Rearview Mirror problems |