Maintenance and Fluid Information for 2007 GMC T7500 Isuzu 6HK1
For the 2007 GMC T7500 Isuzu 6HK1, you will find 15W-40 and 5W-40 in the engine-oil listings. The matching product listings include Heavy-Duty Synthetic Diesel Oil 15W-40, Heavy-Duty Synthetic Diesel Oil 5W-40, Signature Series Max-Duty Synthetic Diesel Oil 15W-40. Those are product matches, not proof that every listed oil meets every requirement for this engine. Check the manufacturer’s oil specification before choosing one.
What oil weight does my 2007 GMC T7500 Isuzu 6HK1 take?
The engine-oil viscosities listed for this vehicle are 15W-40, 5W-40.
What oil filter number is listed for my 2007 GMC T7500 Isuzu 6HK1?
The oil-filter part numbers listed for this vehicle include P559128-EA.
When should I change the oil in my 2007 GMC T7500 Isuzu 6HK1?
Use the manufacturer’s maintenance schedule for this engine and operating conditions. The available application data does not establish an exact oil-change interval.

