Glow Plug System Inhibit Switch - Installation
Number: 83-137Section: 6D (VI)
Date: June, 1984
Subject: INSTALLATION OF GLOW PLUG SYSTEM
INHIBIT SWITCH - 6.2L DIESEL ENGINES
Model and Year: 1982-83 "C-K-P" TRUCK 10-30 SERIES AND 1983 "G" VAN 10-30 SERIES
TO: ALL CHEVROLET DEALERS
Many times, a 6.2L diesel will not require glow plugs to start, such as a warm engine or warm climate.
To inhibit glow plug system function when engine coolant temperature is above 125~F, the following parts can be installed.
Figure 3 - GLOW PLUG INHIBIT WIRE ASSEMBLY:
Inhibit wire assembly; should be assembled per attached drawing (Figure 3).
Figure 1A:
Figure 1B:
GLOW PLUG INHIBIT TEMPERATURE SWITCH INSTALLATION
1. Disconnect batteries.
2. Replace cover on R.H. rear head (Figure 1A) with cover, P/N 14028949 (same as on L.H. head) (Figure 1B). Use new gasket, P/N 14028951. Drain coolant as required.
3. Install new temperature switch, P/N 15599010 (with socket wrench, do not use open end wrench) using appropriate pipe thread sealer. Tighten to 19-27 N-m (13-20 ft.lb.). Replace any lost coolant.
4. Connect glow plug inhibit wire assembly to temperature switch.
5. Route the wire assembly toward the left side of the vehicle, strap to the engine harness as required.
Figure 2 - ENGINE HARNESS CONNECTOR:
6. Disconnect the 4-way engine harness connector from its mate on the glow plug relay extension harness, P/N 12031493 (Figure 2).
7. Remove the light blue wire female terminal from the engine harness 4-way connector and install connector body, P/N 6288704, on this terminal. Plug mating connector on new jumper wire assembly (light blue/black stripe) to P/N 6288704.
8. Insert female terminal (light blue wire) of jumper wire assembly into empty cavity of 4-way connector. Reconnect 4-way connectors.
9. Reconnect batteries.