Get consistent cold-morning diesel starts with the Standard Ignition Engine Air Intake Heater DIH4. This intake-air heater warms the incoming air before it reaches the cylinders, helping the V8-6.6L engine light off and run smoothly during cold-weather starts. It installs as a direct-fit replacement for the 2001-2004 Chevrolet Silverado 2500 HD, 2001-2004 Chevrolet Silverado 3500, 2003-2004 Chevrolet C4500 Kodiak and C5500 Kodiak, 2001-2004 GMC Sierra 2500 HD, 2001-2004 GMC Sierra 3500, and 2003-2004 GMC C4500 Topkick and C5500 Topkick — all with the V8-6.6L engine (see the Buyer's Guide tab for the full application list).
If a failed or weak intake air heater is behind hard cold starting, rough cold running, or excessive startup smoke, this DIH4 replaces that component. Diagnose the cause before ordering, since those symptoms can have other sources. One heater is supplied per package.
What does the DIH4 air intake heater do?
It warms the air entering the intake before it reaches the cylinders, helping the diesel engine start and run more smoothly during cold-weather starts.
Which vehicles does this fit?
It's cataloged for the 2001-2004 Chevrolet Silverado 2500 HD/3500, GMC Sierra 2500 HD/3500, and 2003-2004 Chevrolet/GMC C4500 and C5500 Kodiak/Topkick, all with the V8-6.6L. See the Buyer's Guide tab.
How many heaters do I need?
The listed applications use one heater, and one unit is supplied per package.
What are signs the intake air heater may need replacing?
Hard cold starting, rough running when cold, or extra smoke at startup can be signs. Diagnose the cause first, since those symptoms can have other sources.
Is this a direct-fit replacement?
Yes, it's designed to replace the original air intake heater on the listed V8-6.6L applications.
WARNING: These products can expose you to chemicals including lead and phthalates, which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.
