GMC: 1977: Jimmy K1500, 5.0L Eng VIN U, Part Time T/Case Control

Download the full database via torrent (~1.1 TB) | Download Brad's custom LEMON patches

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