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Engine Operation - Except 4.5L “270” Engines
OURGP11,0000078 –19–27JUL06–2/2
NOTE: Air intake heaters (275 engines) and glow plugs
(475 engines) operate automatically through the
ECU. The Engine Preheater Indicator light on
these engines, located above the key switch,
should always illuminate when the switch is turned
ON. In warm weather, the light illuminates briefly
as a light check. In cold weather, the light remains
on during the automatic operation of the air intake
heater or glow plugs. Operating time depends on
temperature. Do not crank engine until light turns
off.
275-Series Engines with Air Intake Heaters and
475-Series Engines with Glow Plugs: Turn key ON,
but DO NOT crank engine until Engine Preheater
Indicator light turns off.
3. Follow remaining steps 5—6 as listed under earlier in
this section.
Additional information on cold weather operation is
available from your authorized servicing dealer.
19-10
080706
PN=108