Maintenance and Fluid Information for 2003 GMC T6500 Isuzu 6HK1
If you are planning an oil change on a 2003 GMC T6500 Isuzu 6HK1, the product lookup gives you two useful starting points: the engine-oil grades listed are 15W-40 and 5W-40. 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. Before buying oil, confirm that the product also meets the applicable manufacturer specification.
Which synthetic engine oils are listed for my 2003 GMC T6500 Isuzu 6HK1?
Synthetic engine-oil listings for this vehicle include 15W-40, 5W-40. A synthetic listing does not by itself mean the vehicle manufacturer requires full synthetic oil.
What oil filter number is listed for my 2003 GMC T6500 Isuzu 6HK1?
The oil-filter part numbers listed for this vehicle include P559128-EA.
Does severe driving affect oil-change timing for my 2003 GMC T6500 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.
