October 30: LEMON manuals on a temporary server, it is slow and having issues, download the manuals you need! Later in November we will switch back to the fast server.

GMC: 1978: Magnavan 4.8L Eng VIN T, Automatic Trans

This is a LEMON manual, retrieved in 2025.

Repair and Diagnosis
Repair and Diagnosis, all links on one page (may load slowly, but easier to search)
Labor Times
Download .zip for offline use