1978 GMC Truck 1500 Series Diesel Engine Model Owner's and Driver's Manual Supplement. Original.

You have joined a small but growing number of people who have chosen the dependability and fuel economy of a diesel powered vehicle. This manual is a supplement to the 1978 Light Duty Truck Owner's and Driver's Manual and is provided to acquaint you with your diesel engine. It gives operating and maintenance recommendations, as well as important safety information.

Contents:

Starting and Operating

Starting Indicator Lights
Starting Your Diesel Engine

If Engine Fails to Start

Emergency Starting
"Break-In" Schedule
Trailer Towing
Brake Pedal Travel

Service and Maintenance

Fuel Requirements
Engine Oil and Filter Recommendation
Engine Cleaning
Air Cleaner
Batteries

Specifications
Service Station Information

Condition: These are often shoved in a glovebox and end up showing a decent amount of wear over the years. It does shows some wear/use.