Maintenance and Fluid Information for 2006 GMC C6500 Topkick 200/210/230/250/275/300 HP Isuzu 6HK1
For the 2006 GMC C6500 Topkick 200/210/230/250/275/300 HP 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.
When should I change the oil in my 2006 GMC C6500 Topkick 200/210/230/250/275/300 HP 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.
What oil filter number is listed for my 2006 GMC C6500 Topkick 200/210/230/250/275/300 HP Isuzu 6HK1?
The oil-filter part numbers listed for this vehicle include P559128-EA.
What oil weight does my 2006 GMC C6500 Topkick 200/210/230/250/275/300 HP Isuzu 6HK1 take?
The engine-oil viscosities listed for this vehicle are 15W-40, 5W-40.

