Manual Update - DTC's 17 and 18

File In Section: 6E - Engine Fuel & Emission

Bulletin No.: 51-65-09

Date: March, 1995

SUBJECT:
Section 3 - Driveability and Emissions - Diagnostic Update for DTCs 17 and 18

MODELS:
1994 Chevrolet and GMC Truck C/K, G, P Models
with 6.5L Diesel Engine (VINs F, P, 5 - RPOs L65, L49, L56)

This information should be inserted in the facing pages of DTCs 17 and 18 under Diagnostic Aids.

DIAGNOSTIC AIDS

With the Electronic Harness Filter removed from the vehicle, it should be checked for opens, terminal contact/tension and for high resistance. Resistance on circuit 474 (terminal "A" gray wire) should be no more than 2.0 Ohm. A "suspect" Electronic Harness Filter can also be checked for failures at higher temperatures or by applying pressure with your fingers to the protective rubber casing while the voltmeter is still connected.