Engine - Block Heater Availability

Bulletin No. T 84-4
File In Group 6A
Number 43
Date Oct. '83

SUBJECT: ENGINE BLOCK HEATER

MODELS AFFECTED: ALL MODELS EQUIPPED WITH HT4100

FIGURE 1 - Block Heater Installation:

Engine block heater parts have been released for all HT4100 engines through GMWDD. The parts required to install the block heater are as listed below, and should be installed as shown in Figure 1.

Quantity Per Engine Name P/N

2 Engine Block Heaters 1627549
2 Engine Block Heater Cords 1627550

When connecting the heater cords to an electrical outlet, an outdoor extension cord with two female connections, capable of carrying 300 watts of current, must be used. These extension cords are readily available through automotive part and tool suppliers.