C 2500 Truck 2WD V8-350 5.7L (1988)
Air Cleaner Fresh Air Duct/Hose: All Technical Service Bulletins
Engine - Reduced Performance In Warmer Climates
Number: 91-139-6C
Section: 6C
Date: December 1990
Corporate Bulletin No.: 066001
Subject:
REDUCED ENGINE PERFORMANCE
Model and Year:
ALL 1988-91 C/K TRUCKS
TO: ALL CHEVROLET DEALERS
Figure 1
